HTML Site Map

Homepage Last updated: 2017, November 17
Total pages: 2029

1 [2] 3
    
blog1340 pages
xmlrpc.php?rsd
A flexible test panel for microcontroller based power control projects – #2 – owenduffy.net
Australian amateur population trends 1998 – 2017 – owenduffy.net
Is a ham transmitter conjugate matched to its load? – owenduffy.net
KL7AJ on the Conjugate Match Theorem – analytical solution – owenduffy.net
KL7AJ on the Conjugate Match Theorem – owenduffy.net
UHF series coaxial connector characteristic impedance – owenduffy.net
Review of the Amidon AB_200_10 balun – owenduffy.net
Tuned Plate Tuned Grid oscillator – a simple, but complete explanation – owenduffy.net
A flexible test panel for microcontroller based power control projects – owenduffy.net
What is a Ground Plane Antenna? – owenduffy.net
A low Insertion VSWR high Zcm Guanella 1:1 balun for HF – more detail – owenduffy.net
A low Insertion VSWR high Zcm Guanella 1:1 balun for HF – owenduffy.net
G3LNP balun with symmetric ‘matched’ load – owenduffy.net
G3LNP balun – owenduffy.net
Fixes #1: magnetic stirrer with heating plate and digital display XB 85-2 – owenduffy.net
First full month of Amaysim broadband broadband Internet access – owenduffy.net
A little programming adapter for 4 x 2mm pitch pads – owenduffy.net
A low cost 50Ω termination for measurement purposes – owenduffy.net
DL4YHF 50MHz counter on a Chinese TB-244746 PCB – owenduffy.net
“No short antenna is more efficient than a resonant-length antenna” – owenduffy.net
Small untuned loop with MMIC LNA on 80m – owenduffy.net
Review: magnetic stirrer with heating plate and digital display XB 85-2 – owenduffy.net
Failure to treat impedance as a complex quantity leads to… – owenduffy.net
Demonstration of the GR1606B for antenna Z measurement and calcs – owenduffy.net
First full week of Amaysim broadband Internet access – owenduffy.net
4-20mA Pt100 input for the generic heating / cooling controller – owenduffy.net
ESP8266 remote power display for energy monitor – EV3 – 5V display – owenduffy.net
ESP8266 remote power display for energy monitor – EV3 – owenduffy.net
Inside the YHDC SCT013 current transformer – owenduffy.net
BG7TBL noise source – owenduffy.net
ESP8266 remote power display for energy monitor – EV2 – owenduffy.net
ESP8266 remote power display for energy monitor – owenduffy.net
Inductance of a loop of CAT5 pair – owenduffy.net
Calibrating the Elecraft N-GEN – owenduffy.net
Calculation of received noise power given ENB and ENR – owenduffy.net
Effective noise bandwidth – IC-7300 SSB Rx Filter2 (2400Hz) – owenduffy.net
GPS antenna plot – owenduffy.net
Inductance of sensorless brushless DC motors – owenduffy.net
Messi & Paoloni Ultraflex 10 coax cable – owenduffy.net
True balanced tuner – owenduffy.net
SCT-010-000 current transformer protection – owenduffy.net
Standardised processing of instrument screen captures – owenduffy.net
WSPR – data mining 40m 01/08/2017 – owenduffy.net
WSPR checkout on 30m – owenduffy.net
A WSPR experiment for station evaluation – owenduffy.net
Come-along from the past – owenduffy.net
Review of 10 months of iiNet broadband Internet access – owenduffy.net
Chinese batteries – 5 x 2/3A 1.6Ah NiMH cells – owenduffy.net
Chinese BN-V11U NiMH replacement battery – owenduffy.net
Review of Hantek DSO8102E hand held oscilloscope – owenduffy.net
Measurement – owenduffy.net
RPi – owenduffy.net
Digital document signatures – owenduffy.net
Listings – owenduffy.net
My Listings – owenduffy.net
Search Results – owenduffy.net
Exploiting your antenna analyser – owenduffy.net
Exploiting your antenna analyser #12 – owenduffy.net
November 2017 – owenduffy.net
October 2017 – owenduffy.net
September 2017 – owenduffy.net
August 2017 – owenduffy.net
July 2017 – owenduffy.net
June 2017 – owenduffy.net
May 2017 – owenduffy.net
April 2017 – owenduffy.net
March 2017 – owenduffy.net
February 2017 – owenduffy.net
January 2017 – owenduffy.net
December 2016 – owenduffy.net
November 2016 – owenduffy.net
October 2016 – owenduffy.net
September 2016 – owenduffy.net
August 2016 – owenduffy.net
July 2016 – owenduffy.net
June 2016 – owenduffy.net
May 2016 – owenduffy.net
April 2016 – owenduffy.net
March 2016 – owenduffy.net
February 2016 – owenduffy.net
January 2016 – owenduffy.net
December 2015 – owenduffy.net
November 2015 – owenduffy.net
October 2015 – owenduffy.net
September 2015 – owenduffy.net
August 2015 – owenduffy.net
July 2015 – owenduffy.net
June 2015 – owenduffy.net
February 2015 – owenduffy.net
owenduffy.net – Page 82 – Mostly electronics…
ESP8266 IoT DHT22 temperature and humidity – evolution 3 – owenduffy.net
Implementation of G5RV inverted V using high strength aluminium MIG wire – impedance measurements – owenduffy.net
EME Calc v11.11 reconciliation issues – owenduffy.net
Implementation of G5RV inverted V using high strength aluminium MIG wire – owenduffy.net
G3CWI’s ground wave tests Jul 2017 using WSPRlite – owenduffy.net
owenduffy.net – Page 81 – Mostly electronics…
Exploiting your antenna analyser #29 – owenduffy.net
Cheap and nasty 50Ω SMA terminations – owenduffy.net
Exploiting your antenna analyser #28 – owenduffy.net
Ground plane ham myth – inclined radials – owenduffy.net
Folding back the ends of a wire dipole – owenduffy.net
MFJ-225 – sign of reactance – owenduffy.net
Matching a 5/8λ ground plane – owenduffy.net
Common mode impedance of W2DU baluns – owenduffy.net
STL propaganda indeed: QW vertical – dipole – STL model pattern comparison – owenduffy.net
A check load for antenna analysers with UHF series socket – owenduffy.net
owenduffy.net – Page 80 – Mostly electronics…
STL propaganda indeed: dipole – STL pattern comparison – owenduffy.net
STL propaganda indeed – owenduffy.net
Extrapolating VSWR of a simple series resonant antenna – owenduffy.net
High gain external antenna for Wemos ProMini – owenduffy.net
Typical zinc thickness on zinc coated products used for antennas – owenduffy.net
Finding the inductance of the outside of LDF4-50A – owenduffy.net
Loss components in an NEC model of a Small Transmitting Loop – owenduffy.net
Measuring SSB telephony Peak Envelope Power – owenduffy.net
Exploiting waveguide mode of the loop conductor in a small transmitting loop – owenduffy.net
IC-7300 S-meter calibration accuracy – owenduffy.net
owenduffy.net – Page 79 – Mostly electronics…
Kenwood R5000 thermals – owenduffy.net
4NEC2 plots of STL VSWR – owenduffy.net
Estimating the voltage impressed on the tuning capacitor of a small transmitting loop – owenduffy.net
A QRP small transmitting loop evaluation – owenduffy.net
Precise RF small transmitting loop – owenduffy.net
The sign of reactance – SM6WHY’s take – owenduffy.net
A search for some mid power white wide angle LEDs – owenduffy.net
A Demagnetisation Risk Index for a sensorless brushless DC drive – owenduffy.net
Messi & Paoloni Ultraflex 7 coax cable – owenduffy.net
Shunt matching a loaded HF whip – discussion – owenduffy.net
Power in a mismatched transmission line – owenduffy.net
Shunt matching a loaded HF whip with just a VSWR meter – owenduffy.net
G4JNT’s observation of bandwidth effects on WSPR SNR – owenduffy.net
owenduffy.net – Page 78 – Mostly electronics…
W3LPL’s paired WSPRlite test – test 2 – owenduffy.net
Small untuned loop for receiving – NEC model – owenduffy.net
W3LPL’s paired WSPRlite test – test 1 – owenduffy.net
Small untuned loop for receiving – is an amplifier necessary? – owenduffy.net
ESP8266 relay module review – Yunshan WiFi relay – owenduffy.net
ESP8266 IoT DHT22 temperature and humidity – evolution 2 – owenduffy.net
Amateur Radio – Page 26 – owenduffy.net
Antenna Tuners (ATU) – Page 2 – owenduffy.net
Transmission lines – Page 9 – owenduffy.net
Transmit performance of 2m hand held transceivers – owenduffy.net
Fox flasher MkII #2 – owenduffy.net
Matching a quarter wave monopole with two variable caps – owenduffy.net
Fox flasher MkII #3 – owenduffy.net
Accuracy of AIMuhf system – AIM910A vs several recent versions on a ferrite cored inductor – owenduffy.net
owenduffy.net – Page 36 – Mostly electronics…
Owen – Page 36 – owenduffy.net
RC4 thermistor characterisation. – owenduffy.net
An experience with STC 8051 microcontrollers – owenduffy.net
Computing – Page 2 – owenduffy.net
July 2015 – Page 2 – owenduffy.net
An interesting case study – in service evaluation of coax loss – owenduffy.net
Slot.it orange CA20Z build – owenduffy.net
Transmit performance of 2m hand held transceivers – absolute gain estimates – owenduffy.net
Arduino thermistor thermometer – a tutorial – owenduffy.net
I2C – LCD interface – Type 2 – owenduffy.net
Maker – Page 5 – owenduffy.net
Small transmitting loop – gamma match – owenduffy.net
Arduino HMC5883 magnetometer – a tutorial – owenduffy.net
Arduino stepper motor – a tutorial – owenduffy.net
owenduffy.net – Page 37 – Mostly electronics…
Owen – Page 37 – owenduffy.net
Arduino – Page 2 – owenduffy.net
Solar power supply for foxflasher2 – owenduffy.net
Effect of ground on HF horizontal dipole efficiency – more detail – owenduffy.net
Cooling an FT2800M – owenduffy.net
Electronics – Page 7 – owenduffy.net
A tale of two USB-RS232 adapters – owenduffy.net
USBTiny – owenduffy.net
Small transmitting loop – ground loss relationship to radiation resistance – owenduffy.net
Antennas – Page 15 – owenduffy.net
Accuracy of estimation of radiation resistance of small transmitting loops – owenduffy.net
NEC-4 vs NEC-2 on a low small transmitting loop – owenduffy.net
An A/B comparison of a low G5RV with a MobileOne M40-1 – owenduffy.net
Amateur Radio – Page 27 – owenduffy.net
An A/B comparison of a low G5RV with a MobileOne M40-1 – statistical analysis – owenduffy.net
APRS trial Bowral – Wilton – Wollongong – Macquarie Pass – Bowral – owenduffy.net
owenduffy.net – Page 38 – Mostly electronics…
Designing a Guanella 1:1 balun using the ‘unknown’ ferrite toroid – owenduffy.net
End fed matching – PA3HHO design review – owenduffy.net
Amateur Radio – Page 28 – owenduffy.net
Antennas – Page 16 – owenduffy.net
owenduffy.net – Page 39 – Mostly electronics…
Owen – Page 39 – owenduffy.net
Interesting Links – owenduffy.net
Helical loading and Calculate small transmitting loop gain from bandwidth measurement – owenduffy.net
Review of G3LDO STL (Radcom Sep 2010) – owenduffy.net
Differential flux leakage in a Guanella 1:1 balun – an experiment – owenduffy.net
Differential flux leakage in a Guanella 1:1 balun – owenduffy.net
September 2015 – Page 2 – owenduffy.net
Some tools for designing a Guanella 1:1 balun using ferrite toroids – owenduffy.net
Are copper clad VHF whips a marketing ploy – owenduffy.net
Some thoughts on the popular Carolina Windom antenna – owenduffy.net
Adjusting KISS TNC AFSK tx level using an improved isochronous test packet – owenduffy.net
APRS – Page 7 – owenduffy.net
A cheap and cheerful data logger – owenduffy.net
Test equipment – Page 6 – owenduffy.net
October 2015 – Page 2 – owenduffy.net
Trombone capacitors in Small Transmitting Loops – owenduffy.net
OpenLog for TinyTrak – owenduffy.net
DK7ZB’s balun – owenduffy.net
Australian amateur population trends 1998 – 2015 – owenduffy.net
owenduffy.net – Page 41 – Mostly electronics…
Owen – Page 41 – owenduffy.net
OpenLog for TinyTrak – drive test – owenduffy.net
Electronics – Page 8 – owenduffy.net
Maker – Page 6 – owenduffy.net
NBN is coming… it seems – owenduffy.net
Zig zags in APRS tracks – owenduffy.net
The BLHeli sojourn is over – owenduffy.net
RC models – Page 5 – owenduffy.net
Mapping trips from APRS archives – owenduffy.net
Return Loss sweep using IC7410, RL bridge, and RFPM1 – owenduffy.net
An NEC-4.2 model of VK5BR’s 1m square loop for 20m – owenduffy.net
Underhill on Small Transmitting Loop efficiency – owenduffy.net
Small Transmitting Loops – Page 4 – owenduffy.net
Calculation of equivalent self capacitance of Small Transmitting Loop – owenduffy.net
Antennas – Page 17 – owenduffy.net
Calculation of equivalent self capacitance of Small Transmitting Loop – ARRL – owenduffy.net
owenduffy.net – Page 42 – Mostly electronics…
Owen – Page 42 – owenduffy.net
Dipole mode component of VK5BR’s 1m square loop for 20m – owenduffy.net
Dipole mode of Small Transmitting Loop per King – owenduffy.net
Amateur Radio – Page 30 – owenduffy.net
Small Transmitting Loops – Page 5 – owenduffy.net
Backtracking in APRS – owenduffy.net
Review of Austin et al paper “Loss mechanisms in the electrically small loop antenna” – owenduffy.net
November 2015 – Page 2 – owenduffy.net
NEC study of Small Transmitting Loop Q vs frequency – owenduffy.net
K4PP’s 1m Small Transmitting Loop – owenduffy.net
On ignoring capacitor losses in Small Transmitting Loops – owenduffy.net
Belrose field strength measurements of his 80m mobile whip – owenduffy.net
Reconciling W5QJR’s loop formulas – owenduffy.net
Reconciliation of field strength to efficiency calculator with Boswell’s loop measurements – owenduffy.net
owenduffy.net – Page 43 – Mostly electronics…
Antennas – Page 18 – owenduffy.net
Owen – Page 43 – owenduffy.net
Trial of prototype stand alone GPS logger – owenduffy.net
Small Transmitting Loops – Page 6 – owenduffy.net
QRP antennas – owenduffy.net
Proposed 60m amateur band power limit – owenduffy.net
Amateur Radio – Page 31 – owenduffy.net
RC PWM – ON/OFF switch – owenduffy.net
Computing – Page 3 – owenduffy.net
Transmitters – Page 8 – owenduffy.net
AUT – MobileOne M40-1 40m helical – owenduffy.net
VSWR=1 and X≠0 – owenduffy.net
Revised thinking on STC chips – owenduffy.net
Transmission lines – Page 10 – owenduffy.net
Win 10 Threshold 2 issues – owenduffy.net
Expression of VSWR as a simple decimal real number – owenduffy.net
Exploiting your antenna analyser #1 – owenduffy.net
owenduffy.net – Page 44 – Mostly electronics…
Owen – Page 44 – owenduffy.net
NEC model of the quarter size G5RV – owenduffy.net
WSPR version confusion – owenduffy.net
Evolution of WSPR – owenduffy.net
Is maximum power transfer and conjugate matching simultaneously possible – owenduffy.net
Exploiting your antenna analyser #10 – owenduffy.net
Exploiting your antenna analyser #9 – owenduffy.net
Graphic demonstration of loss under standing waves #2 – owenduffy.net
Exploiting your antenna analyser #8 – owenduffy.net
Walter Maxwell’s teachings on system wide conjugate matching – owenduffy.net
Exploiting your antenna analyser #7 – owenduffy.net
Can the magnitude of the complex reflection coefficient (ρ) be greater than 1 – owenduffy.net
18650 Lithium Ion cells on eBay – owenduffy.net
Quiet solar radio flux interpolations calculator – owenduffy.net
Graphic demonstration of loss under standing waves – owenduffy.net
Exploiting your antenna analyser #6 – owenduffy.net
Exploiting your antenna analyser #5 – owenduffy.net
Exploiting your antenna analyser #4 – owenduffy.net
It has been two years already… – owenduffy.net
Exploiting your antenna analyser #3 – owenduffy.net
On negative VSWR – owenduffy.net
Exploiting your antenna analyser #11 – owenduffy.net
Some thoughts on noise on 6m (50MHz)… – owenduffy.net
Canberra trip – APRS / GPS logger – owenduffy.net
Panasonic NCR18650B Lithium Ion cells on eBay – owenduffy.net
ANS T1.523-2001, Telecom Glossary 2000 and Return Loss – owenduffy.net
Update for FSM software (v1.11.0) – owenduffy.net
Exploiting your antenna analyser #2 – owenduffy.net
Search Results for “qsrf” – owenduffy.net
Graphic demonstration of loss under standing waves #3 – owenduffy.net
VSWR expressed as 1:n – owenduffy.net
Some thoughts on a two turn small transmitting loop – owenduffy.net
Ultrafire XML-T6 LED torch – a fix for the dysfunctional mode memory ‘feature’ – owenduffy.net
Chinese AD8307 power measurement module #2 – owenduffy.net
Analysis of a certain dipole animation – owenduffy.net
On copper loss in transmitting baluns – owenduffy.net
MultiStar 5200mAh 3S Lipo – initial tests – owenduffy.net
Exploiting your antenna analyser #20 – owenduffy.net
Review of Dunlavy’s STL patent gain claims – owenduffy.net
Expected ambient noise – in practice – owenduffy.net
Australian Lime Marmalade – owenduffy.net
Exploiting your antenna analyser #21 – owenduffy.net
Chinese AD8307 power measurement module #4 – owenduffy.net
Silver vs alkaline button cells – owenduffy.net
Atten APS3005S – a better thermostatic fan control – owenduffy.net
A drive test of RTKLIB accurate GPS – owenduffy.net
New hosting service – 2016/08/10 – owenduffy.net
Apologies for service disruption – owenduffy.net
Time to get some experience with 32bit microcontrollers – some progress – owenduffy.net
Exploiting your antenna analyser #23 – owenduffy.net
End fed half wave – NEC models for 20m – owenduffy.net
Mandarin & Lime Marmalade – owenduffy.net
Accuracy of AIMuhf system – AIM910B vs several recent versions on a ferrite cored inductor – owenduffy.net
Australian Lime & Lemon Marmalade – owenduffy.net
Another chapter in the NBN debacle – Jul 2016 – owenduffy.net
Tahitian Lime Marmalade – owenduffy.net
InsertionVSWR of Red Dot 2016A – owenduffy.net
InsertionVSWR of Grebenkemper’s Tandem Match – owenduffy.net
Fan controlled by humidity sensor – design technique – owenduffy.net
InsertionVSWR of Revex W560 on HF – owenduffy.net
KG-UV920P repair / modification for driver FET failure – owenduffy.net
Fan controlled by humidity sensor – owenduffy.net
Thinking about vibration forces from a bent prop adapter – owenduffy.net
Cleanflight and PPM – owenduffy.net
Review of inexpensive Chinese thermostat – STC-1000 – owenduffy.net
Optimal Zo for TLT sections challenge – a solution – owenduffy.net
Optimal Zo for Guanella balun sections – owenduffy.net
Comparison of SimonK and BLHeli 14.6 on an Afro30 ESC – owenduffy.net
Can a hand held analyser be used to evaluate Insertion VSWR of a VSWR meter? – owenduffy.net
Dataflash on NAZE32 – owenduffy.net
U-BLOX LEA-6T GPS module – for experiments – owenduffy.net
Coax switches – is shorting unused port necessary for isolation? – owenduffy.net
Ratings of coax antenna switches – owenduffy.net
Seriously Pro F3 flight controller gyro/acc failure – owenduffy.net
Flashing SeriouslyProF3 Cleanflight using ST-LINKV2 – owenduffy.net
Cleanflight – initialisation failure beeps – owenduffy.net
Exploiting your antenna analyser #22 – owenduffy.net
End Fed Half Wave / Inverted L / Half Wave Dipole – owenduffy.net
Chinese counterfeiters at it again – EZP2013 – owenduffy.net
Some automation to supplement Cleanflight-configurator – owenduffy.net
The magic of End Fed Half Waves (EFHW) – owenduffy.net
UV cure adhesive for temperature sensors – owenduffy.net
W2AU 1:1 voltage balun – owenduffy.net
PAROT with transformerless power supply and 230V AC relay – owenduffy.net
Expected ambient noise – owenduffy.net
PAROT with transformerless power supply and 10A SSR – owenduffy.net
owenduffy.net – Page 59 – Mostly electronics…
Arduino app to set DS1307 Real Time Clocks. – owenduffy.net
Analysis of a certain dipole animation – OCF implications – owenduffy.net
Search Results for “IC2200H cooling” – owenduffy.net
Exploiting your antenna analyser #19 – owenduffy.net
Voltage withstand of Vero strip board – owenduffy.net
owenduffy.net – Page 58 – Mostly electronics…
The old wheelbarrow will not die – owenduffy.net
Transformerless power supply for PAROT – owenduffy.net
Variac refurb – owenduffy.net
An Emergency Stop switch for the mill – owenduffy.net
Chinese AD8307 power measurement module #3 – owenduffy.net
Chinese AD8307 power measurement module #1 – owenduffy.net
Exploiting your antenna analyser #18 – owenduffy.net
Exploiting your antenna analyser #17 – owenduffy.net
owenduffy.net – Page 57 – Mostly electronics…
Fox flasher MkII – high power 2 LED solar powered beacon – owenduffy.net
Exploiting your antenna analyser – contents – owenduffy.net
Exploiting your antenna analyser #16 – owenduffy.net
Improved cooling for the ATR-30 – owenduffy.net
On use of enamelled wire in transmitting baluns – owenduffy.net
Exploiting your antenna analyser #15 – owenduffy.net
Assessing the Q of a half wave dipole antenna system – a real world example – owenduffy.net
Assessing the Q of a half wave dipole antenna system – owenduffy.net
Field strength survey of an M40-1 short helical vertical on 40m – owenduffy.net
USB-A to DC 5.5/2.1mm power cable – current carrying capacity – owenduffy.net
owenduffy.net – Page 56 – Mostly electronics…
PIK – owenduffy.net
Counterfeit FTDI – owenduffy.net
Low power Guanella 1:1 balun with low Insertion VSWR using a pair of Jaycar LF1260 suppression sleeves – owenduffy.net
Making sense of LED output figures – owenduffy.net
A tale of three tuners – owenduffy.net
HC-500 – owenduffy.net
A generic run on timer using an ATTINY25 – owenduffy.net
Design / build project: Guanella 1:1 ‘tuner balun for HF’ – #6 – owenduffy.net
Precision GPS experiment #1 – owenduffy.net
Design / build project: Guanella 1:1 ‘tuner balun for HF’ – #5 – owenduffy.net
owenduffy.net – Page 55 – Mostly electronics…
CH340, CH341 USB to RS-232 chip compatibility – owenduffy.net
End fed Zepp – owenduffy.net
Fridge / freezer setup – owenduffy.net
A tutorial on initial design of operating conditions for a valve amplifier – owenduffy.net
Thinking about SOTA, EFHW and EMR safety – owenduffy.net
SPICE model of Zcm of a Guanella 9:1 current balun – owenduffy.net
Ultrafire XML-T6 torch review – owenduffy.net
APRS duplicate removal – trial #3 – owenduffy.net
Chinese 18650 Li-ion cells – Ultrafire capacity test – owenduffy.net
owenduffy.net – Page 54 – Mostly electronics…
End fed matching – analysis of VK3IL’s measurements – owenduffy.net
ATU efficiency – owenduffy.net
RG-6/U for lower HF – owenduffy.net
Elitech RC-4 logging thermometer – owenduffy.net
KL7AJ quick quiz 21/02/2016 – owenduffy.net
Measuring common mode choke Zcm using a two port VNA – owenduffy.net
Rigexpert’s Antscope takes a step backwards – owenduffy.net
Review of N6PAA’s 40m STL – owenduffy.net
Review of KK5JY’s 40m STL – owenduffy.net
owenduffy.net – Page 53 – Mostly electronics…
Design / build project: Guanella 1:1 ‘tuner balun for HF’ – #4 – owenduffy.net
Exploiting your antenna analyser #14 – owenduffy.net
End fed matching – PA3HHO design review #2 – owenduffy.net
Updated: Calculate initial load line of valve RF amplifier – owenduffy.net
Red Ironbark picnic table – owenduffy.net
Identifying ferrite materials #2 – owenduffy.net
Reconciling my #52 choke design tool with G3TXQ’s measurements – owenduffy.net
Identifying ferrite materials – owenduffy.net
A prototype data logger for RFPM1 – owenduffy.net
Low Insertion VSWR HF Guanella 1:1 balun for instrumentation – owenduffy.net
owenduffy.net – Page 52 – Mostly electronics…
A little rigging this week (20160204) – owenduffy.net
APRS duplicate removal – trial #2 – owenduffy.net
Lithium battery – 1S protection boards – owenduffy.net
Low noise Yagis and 50MHz noise – owenduffy.net
A low cost home made USB CI-V interface with open collector and solid Windows drivers – owenduffy.net
Small untuned loop for receiving – optimal loop load resistance – owenduffy.net
NodeMCU devkit V1 deep sleep – owenduffy.net
Voltage and current on a transmission line with standing waves – owenduffy.net
Reset helper for NodeMCU ESP8266 modules – owenduffy.net
Small untuned loop for receiving – Trask noise and gain analysis – owenduffy.net
Small untuned loop for receiving – owenduffy.net
Workup of G5RV inverted V using high strength aluminium MIG wire – owenduffy.net
owenduffy.net – Page 77 – Mostly electronics…
iiNet broadband Internet access – speed observations – owenduffy.net
The Mobius strip loop – ham benefits – owenduffy.net
The fraud of energy efficient lighting – LED lighting – owenduffy.net
Quiet HF antennas and E and H fields in the near field zone – owenduffy.net
LNR Precision small transmitting loop – owenduffy.net
Effect of shorting turns on a tapped air cored solenoid at RF – owenduffy.net
Current and voltage implications of a small transmitting loop power ratings – owenduffy.net
CHA P-Loop 2.0 small transmitting loop – owenduffy.net
80m half wave dipole made from 0.91mm steel MIG wire – owenduffy.net
80m half wave dipole made from galvanised fence wire – owenduffy.net
owenduffy.net – Page 76 – Mostly electronics…
Skin depth in copper at 1.8MHz according to QRZ – owenduffy.net
Reconciliation of Duffy CCS model with N7WS ladder line measurements – owenduffy.net
A model of current distribution in copper clad steel conductors at RF – owenduffy.net
QRP quarterly on small transmitting loop efficiency – owenduffy.net
DHT22 (AM2302) input for the generic heating / cooling controller – owenduffy.net
ESP8266 IoT DHT22 temperature and humidity – owenduffy.net
Review of Dodd’s WSPR based antenna comparison – owenduffy.net
owenduffy.net – Page 75 – Mostly electronics…
Review of 5 months of iiNet broadband Internet access – owenduffy.net
Loss of ladder line: copper vs CCS (DXE-LL300-1C) – owenduffy.net
EmonTx3 v3.4 ‘wired’ implementation – owenduffy.net
Loss in open wire + coax hybrid feed arrangements – owenduffy.net
Exploiting your antenna analyser #27 – owenduffy.net
Loss of windowed ladder line at MF/HF/VHF – owenduffy.net
WSPR checkout on new workstation – owenduffy.net
DS18B20 input for the generic heating / cooling controller – owenduffy.net
owenduffy.net – Page 74 – Mostly electronics…
ic9350 updated to support 3040 – owenduffy.net
Modifications for Jasic 200A TIG welder and pedal – owenduffy.net
NH7RO 7-foot diameter QRO STL for 40M – owenduffy.net
Check / calibrate frequency accuracy of IC-7300 – owenduffy.net
Demagnetisation in a sensorless brushless DC drive – owenduffy.net
Surecom SW-102 VSWR meter review – owenduffy.net
dB, dBi, and dBd – owenduffy.net
Hobbyking Multistar 4220-650Kv – owenduffy.net
Does common mode current flow inside coax? – owenduffy.net
Exploiting your antenna analyser #26 – owenduffy.net
PD7MAA’s BN43-202 matching transformer for an EFHW – full measurement set – owenduffy.net
Thoughts on binocular ferrite core inductors at radio frequencies – owenduffy.net
owenduffy.net – Page 73 – Mostly electronics…
Common failings of EFHW matching transformers – owenduffy.net
PD7MAA’s BN43-202 matching transformer for an EFHW – owenduffy.net
Earth electrodes in parallel – owenduffy.net
VY Commodore key repair – owenduffy.net
G4YDM balun – owenduffy.net
Another speaker mic modification to reduce RF interference – owenduffy.net
Rigexpert Antscope v4.3.1 dowload link? – owenduffy.net
owenduffy.net – Page 72 – Mostly electronics…
Regenerative braking and electronic power supplies – owenduffy.net
RCTimer 4215-530Kv BLDC motor checkout – owenduffy.net
End fed matching – VK3IL design on LO1238 – owenduffy.net
CC3D F4 fraud – owenduffy.net
LP-100A impedance measurement – owenduffy.net
Rigexpert Antscope v4.3.1 released – owenduffy.net
Tytera MD-390 DMR portable evaluation – owenduffy.net
Improving quadcopter stability at very low throttle using Complementary PWM – owenduffy.net
Max thrust: Hobbywing XRotor 40A (MkII) vs BLHeli Hobbywing XRotor 40A (MkII) vs SimonK Hobbyking 9261000003 40A – owenduffy.net
AU ordinary power plug, plug packs and extension cord sockets – owenduffy.net
Arduino 1.6.12 – adding Optiboard boards.txt – owenduffy.net
owenduffy.net – Page 71 – Mostly electronics…
BLHeli Hobbywing XRotor 40A (MkII) vs SimonK Hobbyking 9261000003 40A – owenduffy.net
BLHeli 14.8 damped light and active freewheeling – owenduffy.net
Hobbywing XRotor 40A (MkII) – owenduffy.net
Arduino 1.6.12 & 1.6.13 AVRDUDE issues – owenduffy.net
Robust programming of Silabs based BLHeli ESCs – owenduffy.net
Another RFI mod of a speaker mic (41-80K) for DMR use – owenduffy.net
APRS duplicate removal – owenduffy.net
APRS – APRS-IS latency – owenduffy.net
Ten-tec on the meaning of SWR – owenduffy.net
Retevis MD-380 speaker mic modification to reduce RF interference – owenduffy.net
owenduffy.net – Page 70 – Mostly electronics…
TYT (Tytera) MD-390 speaker mic plug compatibility issues – owenduffy.net
LED lighting woes – owenduffy.net
Icom IC-7410 – PTT tuner start doesn’t work – owenduffy.net
Anatomy of an F barrel (F81) – owenduffy.net
Speaker-microphones and DMR portables – owenduffy.net
Reflected power alarm for the MFJ-993B – owenduffy.net
Radio-Kits SWR meter – build and review – owenduffy.net
Grebenkember’s original Tandem match – owenduffy.net
KitsAndParts.com QRP SWR bridge – owenduffy.net
DMR distance limit – owenduffy.net
owenduffy.net – Page 69 – Mostly electronics…
First month of iiNet FTTN broadband Internet access – owenduffy.net
TV upgrade – MER optimisation – owenduffy.net
Coil32 inductance calculator – owenduffy.net
Walter Maxwell’s teachings on system wide conjugate matching – owenduffy.net
Some thinking on ground wave as we enter another solar minimum – owenduffy.net
ADS1115 ADC checkout – #1 – owenduffy.net
Polarisation of man made noise – an 80m case – owenduffy.net
Exploiting your antenna analyser #25 – owenduffy.net
Exploiting your antenna analyser #24 – owenduffy.net
TV upgrade – owenduffy.net
Polarisation of man made noise – owenduffy.net
Backup for NBN VDSL access – owenduffy.net
Small signal diode characteristics – owenduffy.net
owenduffy.net – Page 68 – Mostly electronics…
Queueing in data networks – owenduffy.net
Android and local IPv4 DNS name resolution – owenduffy.net
First week of iiNet FTTN broadband Internet access – owenduffy.net
Backup options for NBN VDSL access – owenduffy.net
mpd on a RPi, streamripper and sox – owenduffy.net
A prototype small 4:1 broadband RF transformer using medium µ ferrite core for receiving use – owenduffy.net
A method for design of small broadband RF transformers using medium µ ferrite core for receiving use – owenduffy.net
Turning 1kW into QRP – owenduffy.net
owenduffy.net – Page 51 – Mostly electronics…
Rigexpert Antscope v4.2.85 released – owenduffy.net
OCF short vertical dipole for HF – VY1GP – owenduffy.net
owenduffy.net – Page 67 – Mostly electronics…
Effective Radiated Power (ERP) – owenduffy.net
Adapting a 5V TTL GPS to RS232 – owenduffy.net
BN-43-2402 balun example – owenduffy.net
iinet – pre-connect experience – owenduffy.net
Hosting change – owenduffy.net
OCF short vertical dipole for HF – owenduffy.net
Cadweld Plus Control Unit – owenduffy.net
MFJ-993B internal balun review – owenduffy.net
Shack entry / ATU configuration for my G5RV with tuned feeder – owenduffy.net
Cheap Chinese compression connector tool – owenduffy.net
Zo of two wire line – owenduffy.net
The sign of Return Loss – owenduffy.net
Is the premises main earthing conductor ok as a lightning down conductor – owenduffy.net
owenduffy.net – Page 66 – Mostly electronics…
Rigexpert Antscope v4.2.83 released – owenduffy.net
Rationale for sizing of lightning down conductor – owenduffy.net
Command adapter for JRC NFG-170 NFG-230 ATU – owenduffy.net
Demonstration video of Cadweld Oneshot Plus ground rod connection – owenduffy.net
AD9850 / AD9851 initialisation using PllLdr – owenduffy.net
ADF4351 / PllLdr checkout – owenduffy.net
Effective RF resistance of a braided solenoid – Gilbert’s coil measurements – owenduffy.net
Toshiba alkaline AA leakage problems – owenduffy.net
Mast ground rework – owenduffy.net
MFJ-993B on my G5RV with tuned feeder – owenduffy.net
owenduffy.net – Page 65 – Mostly electronics…
NEC GM, GX tutorial – owenduffy.net
Post mortem review of a 144MHz combiner / splitter – owenduffy.net
Transmitter pulse generator for SSB RF PA adjustment – owenduffy.net
A certain formula for antenna system Q – owenduffy.net
Tuning combiner lines – owenduffy.net
Treatment of the -ve DC return path for transceivers in mobile installations – owenduffy.net
owenduffy.net – Page 64 – Mostly electronics…
Fan controlled by humidity sensor – pre implementation data gathering – owenduffy.net
Antenna analysers – the basics – QST Aug 2016 – owenduffy.net
RC electric drive noise – owenduffy.net
owenduffy.net – Page 63 – Mostly electronics…
Signed application programs – owenduffy.net
owenduffy.net – Page 62 – Mostly electronics…
owenduffy.net – Page 61 – Mostly electronics…
owenduffy.net – Page 60 – Mostly electronics…
owenduffy.net – Page 50 – Mostly electronics…
owenduffy.net – Page 49 – Mostly electronics…
End fed matching – design review – owenduffy.net
owenduffy.net – Page 48 – Mostly electronics…
owenduffy.net – Page 47 – Mostly electronics…
owenduffy.net – Page 46 – Mostly electronics…
owenduffy.net – Page 45 – Mostly electronics…
Test equipment – Page 7 – owenduffy.net
Antennas – Page 19 – owenduffy.net
December 2015 – Page 2 – owenduffy.net
Amateur Radio – Page 32 – owenduffy.net
Transmission lines – Page 11 – owenduffy.net
Owen – Page 45 – owenduffy.net
Transmitters – Page 9 – owenduffy.net
AIM use & issues – Page 3 – owenduffy.net
December 2015 – Page 3 – owenduffy.net
Amateur Radio – Page 33 – owenduffy.net
Bulk file rename using regular expressions on Windows – owenduffy.net
Characterising an unknown ferrite toroid – owenduffy.net
Mini60 antenna analyser – owenduffy.net
A method for initial ground loss estimates for an STL – owenduffy.net
Silicon Chip Collinear – owenduffy.net
Yet another dodgy coax collinear II – owenduffy.net
Owen – Page 38 – owenduffy.net
August 2015 – Page 2 – owenduffy.net
Antennas – Page 20 – owenduffy.net
Owen – Page 46 – owenduffy.net
owenduffy.net – Page 29 – Mostly electronics…
Test equipment – Page 8 – owenduffy.net
January 2016 – Page 2 – owenduffy.net
Receivers – Page 4 – owenduffy.net
Transmission lines – Page 12 – owenduffy.net
Exploiting your antenna analyser – Page 2 – owenduffy.net
Transmission line loss under mismatch explanations – the missing TWLLC model – owenduffy.net
Transmission line loss under mismatch explanations – owenduffy.net
DIY USB password generator – (USB PRC) enhanced #1 – owenduffy.net
DIY USB password generator – owenduffy.net
NAZE32 / Cleanflight trial – owenduffy.net
Does VSWR damage HF ham transmitters – owenduffy.net
Steel wire CF dipole on 160m – owenduffy.net
Amateur Radio – Page 29 – owenduffy.net
owenduffy.net – Page 40 – Mostly electronics…
Owen – Page 40 – owenduffy.net
Owen – Page 47 – owenduffy.net
AIM 865A produces inconsistent / incorrect results – owenduffy.net
Amateur Radio – Page 34 – owenduffy.net
APRS – Page 8 – owenduffy.net
January 2016 – Page 3 – owenduffy.net
Owen – Page 48 – owenduffy.net
Amateur Radio – Page 35 – owenduffy.net
Antennas – Page 21 – owenduffy.net
Electronics – Page 9 – owenduffy.net
Test equipment – Page 9 – owenduffy.net
Transmitters – Page 10 – owenduffy.net
February 2016 – Page 2 – owenduffy.net
Owen – Page 49 – owenduffy.net
Baluns – Page 5 – owenduffy.net
Transmission lines – Page 13 – owenduffy.net
Amateur Radio – Page 36 – owenduffy.net
February 2016 – Page 3 – owenduffy.net
Owen – Page 50 – owenduffy.net
Search Results for “end fed half wave” – owenduffy.net
Search Results for “end fed half wave” – Page 2 – owenduffy.net
Amateur Radio – Page 37 – owenduffy.net
Antennas – Page 22 – owenduffy.net
March 2016 – Page 2 – owenduffy.net
AIM 865A Refer to Antenna facility – owenduffy.net
Owen – Page 51 – owenduffy.net
Antennas – Page 12 – owenduffy.net
Test equipment – Page 10 – owenduffy.net
Transmitters – Page 11 – owenduffy.net
Electronics – Page 10 – owenduffy.net
Antenna Tuners (ATU) – Page 3 – owenduffy.net
Owen – Page 52 – owenduffy.net
April 2016 – Page 2 – owenduffy.net
Amateur Radio – Page 38 – owenduffy.net
Transmission lines – Page 14 – owenduffy.net
Antennas – Page 23 – owenduffy.net
Owen – Page 53 – owenduffy.net
Maker – Page 7 – owenduffy.net
Amateur Radio – Page 39 – owenduffy.net
Test equipment – Page 11 – owenduffy.net
Electrical – Page 2 – owenduffy.net
Interpreting temperature rise in ferrite cored RF transformers and inductors – owenduffy.net
May 2016 – Page 2 – owenduffy.net
Owen – Page 54 – owenduffy.net
Towards a reliable APRS iGate – #2 – owenduffy.net
Exploiting your antenna analyser – Page 3 – owenduffy.net
Transmitters – Page 12 – owenduffy.net
Baluns – Page 6 – owenduffy.net
owenduffy.net rework – owenduffy.net
A test run of the generic heating / cooling controller with 10k NTC thermistor sensor – owenduffy.net
TNC-X – channel access behaviour – owenduffy.net
Owen – Page 55 – owenduffy.net
Towards a reliable APRS iGate – owenduffy.net
VK3IL’s 3m circumference LDF4-50B loop on 40m – owenduffy.net
Electronics – Page 11 – owenduffy.net
Amateur Radio – Page 40 – owenduffy.net
2.4:1 balun design failure – owenduffy.net
Search Results for “end fed half wave” – Page 3 – owenduffy.net
June 2016 – Page 2 – owenduffy.net
Owen – Page 56 – owenduffy.net
Antennas – Page 24 – owenduffy.net
Transmission lines – Page 15 – owenduffy.net
TNC-X – DCD behaviour – owenduffy.net
Does anyone assess to their digi / iGate performance? – owenduffy.net
Electronics – Page 4 – owenduffy.net
Owen – Page 57 – owenduffy.net
Amateur Radio – Page 41 – owenduffy.net
Electronics – Page 12 – owenduffy.net
RC models – Page 6 – owenduffy.net
July 2016 – Page 2 – owenduffy.net
EMECalc v9.09 reconciliation issue – owenduffy.net
Owen – Page 58 – owenduffy.net
Test equipment – Page 12 – owenduffy.net
Transmission lines – Page 16 – owenduffy.net
July 2016 – Page 3 – owenduffy.net
Owen – Page 59 – owenduffy.net
Amateur Radio – Page 42 – owenduffy.net
Computing – Page 4 – owenduffy.net
Maker – Page 8 – owenduffy.net
Owen – Page 60 – owenduffy.net
August 2016 – Page 2 – owenduffy.net
Antennas – Page 25 – owenduffy.net
Transmitters – Page 13 – owenduffy.net
Amateur Radio – Page 43 – owenduffy.net
Owen – Page 61 – owenduffy.net
September 2016 – Page 2 – owenduffy.net
Amateur Radio – Page 44 – owenduffy.net
Owen – Page 62 – owenduffy.net
Transmission lines – Page 17 – owenduffy.net
September 2016 – Page 3 – owenduffy.net
Antennas – Page 26 – owenduffy.net
Test equipment – Page 13 – owenduffy.net
Amateur Radio – Page 45 – owenduffy.net
Owen – Page 63 – owenduffy.net
October 2016 – Page 2 – owenduffy.net
Owen – Page 64 – owenduffy.net
Electronics – Page 13 – owenduffy.net
October 2016 – Page 3 – owenduffy.net
Owen – Page 65 – owenduffy.net
Amateur Radio – Page 46 – owenduffy.net
Antennas – Page 27 – owenduffy.net
Owen – Page 66 – owenduffy.net
Electrical – Page 3 – owenduffy.net
Transmitters – Page 14 – owenduffy.net
Arduino – Page 3 – owenduffy.net
December 2016 – Page 2 – owenduffy.net
Owen – Page 67 – owenduffy.net
Amateur Radio – Page 47 – owenduffy.net
Test equipment – Page 14 – owenduffy.net
RC models – Page 7 – owenduffy.net
Owen – Page 68 – owenduffy.net
Transmission lines – Page 18 – owenduffy.net
Amateur Radio – Page 48 – owenduffy.net
January 2017 – Page 2 – owenduffy.net
Owen – Page 69 – owenduffy.net
Antennas – Page 28 – owenduffy.net
Owen – Page 70 – owenduffy.net
Amateur Radio – Page 49 – owenduffy.net
Owen – Page 71 – owenduffy.net
Computing – Page 5 – owenduffy.net
Electronics – Page 14 – owenduffy.net
March 2017 – Page 2 – owenduffy.net
Amateur Radio – Page 50 – owenduffy.net
Antennas – Page 29 – owenduffy.net
Owen – Page 72 – owenduffy.net
Transmission lines – Page 19 – owenduffy.net
April 2017 – Page 2 – owenduffy.net
Small Transmitting Loops – Page 7 – owenduffy.net
Antennas – Page 30 – owenduffy.net
Telecommunications – Page 2 – owenduffy.net
Owen – Page 73 – owenduffy.net
Amateur Radio – Page 51 – owenduffy.net
Maker – Page 9 – owenduffy.net
Owen – Page 74 – owenduffy.net
May 2017 – Page 2 – owenduffy.net
Amateur Radio – Page 52 – owenduffy.net
Antennas – Page 31 – owenduffy.net
Owen – Page 75 – owenduffy.net
June 2017 – Page 2 – owenduffy.net
Amateur Radio – Page 53 – owenduffy.net
Small Transmitting Loops – Page 8 – owenduffy.net
Antennas – Page 32 – owenduffy.net
Owen – Page 76 – owenduffy.net
Amateur Radio – Page 54 – owenduffy.net
Test equipment – Page 15 – owenduffy.net
Transmission lines – Page 20 – owenduffy.net
Transmitters – Page 15 – owenduffy.net
Owen – Page 77 – owenduffy.net
Antennas – Page 33 – owenduffy.net
July 2017 – Page 2 – owenduffy.net
Electronics – Page 15 – owenduffy.net
Amateur Radio – Page 55 – owenduffy.net
Owen – Page 78 – owenduffy.net
Measurement – Page 2 – owenduffy.net
Antenna Tuners (ATU) – Page 4 – owenduffy.net
Receivers – Page 5 – owenduffy.net
August 2017 – Page 2 – owenduffy.net
Owen – Page 79 – owenduffy.net
Electronics – Page 16 – owenduffy.net
Maker – Page 10 – owenduffy.net
Amateur Radio – Page 56 – owenduffy.net
Antennas – Page 34 – owenduffy.net
Owen – Page 80 – owenduffy.net
September 2017 – Page 2 – owenduffy.net
Measurement – Page 3 – owenduffy.net
InsertionLoss implies InsertionVSWR in lossless devices – owenduffy.net
Owen – Page 81 – owenduffy.net
Exploiting your antenna analyser #13 – owenduffy.net
Baluns – Page 7 – owenduffy.net
Amateur Radio – Page 57 – owenduffy.net
Electrical – Page 4 – owenduffy.net
October 2017 – Page 2 – owenduffy.net
Antennas – Page 35 – owenduffy.net
Owen – Page 82 – owenduffy.net
Improved cooling for the MFJ-949E – owenduffy.net
PD7MAA’s BN43-202 matching transformer for an EFHW – measurement of a prototype – owenduffy.net
Micro SD card premature failure – owenduffy.net
Electronics – Page 17 – owenduffy.net
Transmission lines – Page 21 – owenduffy.net
         
wp-includes1 page
wlwmanifest.xml
         
wp-content
              
uploads
                   
2014
                        
101 page
VHF-APRS-traffic-study-VK2OMD-3-11_10_2014-.pdf
                        
051 page
VSWRCurveDerivation.pdf
                        
011 page
RogerBeep.pdf
                   
2015
                        
021 page
VHF-APRS-traffic-study-VK2OMD-3-08_02_2015-.pdf
                        
101 page
config.txt
    
calc46 pages
Noise measurement uncertainty calculator
Field strength / receive power converter
Receiver sensitivity / noise figure / noise factor / noise floor converter
Noise Figure Y factor method calculator
Calculator to support Manual Testing of Field-Strength Levels Using Conventional Receivers
Ambient noise calculator
Antenna Factor of short tuned vertical with concentrated loading
SG / Brix / Plato / Baume calculator
Characteristic impedance of transmission line of two square conductors in air
RX1, RX2 Noise bridge calculator
Generic noise bridge calculator
Calculate initial load line of valve RF amplifier
Calculate RF amplifier pi coupler
Measuring RF impedance by the three voltmeter method
Convert Vpk-Vpp-Vrms-dBV-dBu-mW-dBm
Calculate braid coverage
T Match efficiency estimator
Calculate ferrite cored inductor - rectangular cross section
Calculate ferrite cored inductor - circular cross section
Calculate ferrite cored inductor (from Al)
Skin depth calculator
Student's t test calculator
Factorise integer
Convert Antenna Factor and Gain
Folded dipole step up ratio calculator
Calculate small loop Antenna Factor
Calculate small transmitting loop gain from bandwidth measurement
Calculate Antenna Q from VSWR bandwidth measurement
Calculate VSWR and Return Loss from Zload and Zo
Find R,|X| from VSWR,|Z|,Ro
Calculate cooking time for soft boiled egg
Two point thermistor calibration
Wire DC resistance calculator
Calculate efficiency of vertically polarised antenna from far field strength
Calculate VSWR and Return Loss from Zload (or Yload or S11) and Zo
Calculate Vmax, Vmin, Imax, Imin for lossless line from Zload (or Yload) and Zo
Calculate transmission line Matched Line Loss from Rin of o/c or s/c resonant section
Calculate luminous flux (lm) from luminous intensity (cd) and apex angle (°)
Find |Z|,R,|X| from VSWR,|Z|,R,X,Ro
Estimate Matched Line Loss from paired VSWR measurements
Calculate length of helix of round wire
Velocity factor solver
RTD tolerance calculator
Calculate shunt / beta / hairpin match
Measuring impedance using an oscilloscope
Calculate G/T from Sun noise Y measurement
         
qsrf2 pages
Quiet sun radio flux interpolations
Quiet sun radio flux interpolations
         
awcc1 page
Antenna wire catenary calculator
         
tl14 pages
VSWR calculator
Calculate Vpk and Irms for given power at complex load
RF Transmission Line Loss Calculator
RF Two Wire Transmission Line Loss Calculator
RF Arbitrary Transmission Line Loss Calculator
RF Coaxial Transmission Line Loss Calculator
RF Round Wire Inductance Calculator
ATLLC Examples
vswr.pdf
VSWR calculator help
TLLC help
TWLLC help
RF Arbitrary Transmission Line Loss Calculator
TLLC help
    
bpl15 pages
Theme page: Broadband over Power Lines
Theme page: Broadband over Power Lines
An introduction to Broadband over Power Lines
Are you ready for BPL enablement of your home and neighbourhood?
ManagementOfInterferenceFromBpl-OwenDuffy.pdf
Observations of ambient noise / emissions at Jerrabomberra - April 2007
Hobart BPL Trial -  11-12 January 2007
Country Energy BPL Trial Oct - Febuary 2004
Woomera BPL Trial Oct - Dec 2004
Queanbeyan BPL Trial Mar 2005
Queanbeyan BPL Trial Nov 2004
Ionospheric propagation of BPL emissions
How much radiated power does it take to create an S9 signal?
Comparison of the proposed CENELEC standard and existing US FCC 15.209 on HF Amateur Bands
Jerrabomberra-20070404-FSMData.xls
    
files13 pages
ATC.pdf
AmateurRadioLog.pdf
NoiseMeasurementUncertainty.pdf
EstimateZFerriteToroidInductor.pdf
GuanellaBalun01.pdf
AvoidingFlashoverInBalunsAndAtus.pdf
DirectionalWattmeter.pdf
An%20analysis%20of%20current%20flow%20at%20the%20end%20of%20shielded%20twin%20line%20at%20radio%20frequencies.pdf
MllFromZin.pdf
Counterpoise.pdf
SilverAlkalineCells.pdf
CoaxTrap01.pdf
NoiseAndReceivers.pdf
         
aprx21 pages
Index of /files/aprx
Index of /files/aprx
Index of /files/aprx
Index of /files/aprx
Index of /files/aprx
builds.txt
tncx-rst.expect
tncx-init.expect
tnc2-rst.expect
tnc2-init.expect
tf-rst.expect
tf-init.expect
log.expect
links
kiss-rst.expect
kiss-init.expect
Index of /files/aprx
Index of /files/aprx
Index of /files/aprx
Index of /files/aprx
aprx_2.09.652_armhf.changes
    
module
         
137700Osc2 pages
137.7kHz oscillator
137700.hex
         
QrssTx3 pages
QRP QRSS Beacon Transmitter - on air
QRSS observation utilities
QRP QRSS Beacon Transmitter
         
rb4 pages
Roger Beep
Roger Beep - tone waveform development
Roger Beep - older firmware versions
Roger Beep - kit contents and construction notes
              
SM81 page
Roger Beep - SM8 installation notes
              
IC70002 pages
Roger Beep - IC7000 + HM-151 installation notes
Roger Beep - IC7000 + Traveller headset installation notes
              
IC9101 page
Roger Beep - IC910 installation notes
              
MC801 page
Roger Beep - MC80 installation notes
              
TS20001 page
Roger Beep - TS2000 installation notes
         
CpldPll1 page
An experimental CPLD based PLL
         
ic93501 page
Icom - 9350 / 3040 Protocol Converter (ic9350)
         
dc2 pages
12V DC distribution in car for radio applications - 2005
Anderson Power Poles for 12VDC radio applications
         
PepAmp5 pages
Peak amplifier for an RF wattmeter
Peak amplifier for Drake W4 directional wattmeter
Peak amplifier for Bird 43 coupler directional wattmeter by F6DFZ
PeakAmp.xls
PeakAmpSchematic.pdf
         
hdt1 page
Heater Delay Timer
         
EA78Accukeyer1 page
EA 1978 Accu-keyer improvements
         
crd1 page
Coax Relay Driver
         
SoundCardPreamp2 pages
Sound card microphone preamplifier
SoundCardPreAmpDesign.xls
         
TuneMate3 pages
TuneMate for Icom transceivers
icah4e002.pdf
icah4e001.pdf
         
pik5 pages
PIK - PIC Iambic Keyer
PIK - PIC Iambic Keyer
PIK timing
pik011.pdf
pik001.pdf
              
VK3XU1 page
VK3XU's PIK with integral iambic paddles
         
rpi2 pages
Radio Programming Interface
rpipanel.pdf
         
TncAudioBob1 page
TNC Audio Break-Out-Box
         
Echolink1 page
Echolink interface unit
         
SpkrHiPass1 page
High Pass speaker filter for CTCSS suppression
         
g2c1 page
GPIB to Centronics Protocol Converter
         
SCAmmeter1 page
Silicon Chip Automotive Ammeter (June 2002) - mods
         
PhoneFilter1 page
Simple RF filter for telephone line
         
mdmrst1 page
Mdmrst
         
HAPN1 page
Fitting a HAPN 4800 board to a Paccomm Tiny 2 Mk II
         
FlashTnc2 pages
Flash TNC
flashtncartwork.pdf
         
VkPowermate1 page
VKPowermate II
         
AH4-AT3001 page
AH4-AT300 Protocol Converter
         
hdt21 page
Heater Delay Timer
         
1kHzRef2 pages
1kHz reference oscillator
1kHzRef.hex
         
137.700Beacon1 page
137.7kHz QRSS on one chip
              
files1 page
QRSS137-t25.hex
         
440HzRef2 pages
440Hz (A4, A440) reference oscillator
440HzRef.hex
         
PllLdr3 pages
MCU to load PLL configuration registers
PllLdr - EEPROM data structure
Synthesisers and external reference clocks
              
cs011 page
PllLdr application - AD9850
              
cs021 page
PllLdr application - AD9850/51 300Bd FSK
              
cs031 page
PllLdr application - BH1415F
              
Picaxe1 page
Picaxe PLL loaders
              
files2 pages
PllLdr.hex
PllLdr-tx5.hex
              
cs041 page
PllLdr application - Si4133G (VK3XDK Agile PLL)
              
cs051 page
PllLdr application - Si4133GT (VK3XDK Agile PLL V2)
         
DtrRtsInterface1 page
DTR / RTS interface unit
         
smbk8 pages
Simple Morse beacon keyer
Improving weak signal identification of FSK beacons
Another simple Morse beacon keyer - basic, but accurate
Simple Morse beacon keyer - using ATB
Simple Morse beacon keyer - EEPROM data structure
Another Morse beacon keyer - A/B RF switching
Morse beacon keyer for a cluster of transmitters
Simple Morse beacon keyer - onair
              
files4 pages
QrssBeacon-m168.hex
QrssBeacon-tx4.hex
QrssBeacon-tx5.hex
QrssBeacon-tx5x.hex
         
ESR1 page
Anatek ESR Meter - VK1OD implementation
         
RfCurrentSampler1 page
RF current sampler
         
atpa1 page
AVR ATTiny programming adapter
         
K3ngKeyer1 page
RS232 Morse keyer
         
gpsppsu1 page
GPS PPS Utility (gpsppsu)
              
files 7 pages
gpsppsu.hex
1 [2] 3