Last updated: 2018, November 16 11:11:17
Total pages: 1400 owenduffy.net Homepage

• /3 pages
• • blog/812 pages
  • QRP quarterly on small transmitting loop efficiency – owenduffy.net
  • Reconciliation of Duffy CCS model with N7WS ladder line measurements – owenduffy.net
  • ESP8266 relay module review – Yunshan WiFi relay – owenduffy.net
  • Small untuned loop for receiving – optimal loop load resistance – owenduffy.net
  • Small untuned loop for receiving – Trask noise and gain analysis – owenduffy.net
  • Reset helper for NodeMCU ESP8266 modules – owenduffy.net
  • Loss of JSC ladder line at 160m – owenduffy.net
  • TYT (Tytera) MD-390 speaker mic plug compatibility issues – owenduffy.net
  • Retevis MD-380 speaker mic modification to reduce RF interference – owenduffy.net
  • Ten-tec on the meaning of SWR – 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
  • Rigexpert Antscope v4.2.85 released – owenduffy.net
  • OCF short vertical dipole for HF – VY1GP – owenduffy.net
  • Effective Radiated Power (ERP) – owenduffy.net
  • Cadweld Plus Control Unit – 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
  • Post mortem review of a 144MHz combiner / splitter – owenduffy.net
  • Transmitter pulse generator for SSB RF PA adjustment – owenduffy.net
  • ?s=IC2200H+cooling&feed=rss2
  • Cooling an IC2200H – update #2 – owenduffy.net
  • Cooling an IC2200H – update – owenduffy.net
  • Cooling an FT2800M – owenduffy.net
  • Review of inexpensive Chinese thermostat – STC-1000 – owenduffy.net
  • Can a hand held analyser be used to evaluate Insertion VSWR of a VSWR meter? – owenduffy.net
  • Ratings of coax antenna switches – owenduffy.net
  • InsertionLoss implies InsertionVSWR in lossless devices – 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
  • Chinese AD8307 power measurement module #2 – owenduffy.net
  • UV cure adhesive for temperature sensors – owenduffy.net
  • PAROT with transformerless power supply and 10A SSR – owenduffy.net
  • Amateur Radio – Page 65 – 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
  • RC PWM – ON/OFF switch – owenduffy.net
  • Dipole mode component of VK5BR’s 1m square loop for 20m – owenduffy.net
  • An NEC-4.2 model of VK5BR’s 1m square loop for 20m – owenduffy.net
  • Dipole mode of Small Transmitting Loop per King – owenduffy.net
  • Calculation of equivalent self capacitance of Small Transmitting Loop – ARRL – owenduffy.net
  • Calculation of equivalent self capacitance of Small Transmitting Loop – owenduffy.net
  • G/T spreadsheet update (v1.09) – owenduffy.net
  • Does VSWR damage HF ham transmitters – 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
  • Some thoughts on the popular Carolina Windom antenna – owenduffy.net
  • Bulk file rename using regular expressions on Windows – owenduffy.net
  • Mini60 antenna analyser – owenduffy.net
  • Search Results for “collinear” – owenduffy.net
  • An experience with STC 8051 microcontrollers – owenduffy.net
  • Folding back the ends of a wire dipole – owenduffy.net
  • Capacitive loading device for fine tuning wire dipoles – owenduffy.net
  • Review of inexpensive Chinese thermostat – 8010F – owenduffy.net
  • Review of inexpensive Chinese thermostat – MH-1210 – owenduffy.net
  • VK3IL’s 3m circumference LDF4-50B loop on 20m – owenduffy.net
  • VK3IL’s 3m circumference LDF4-50B loop on 40m – owenduffy.net
  • Enhancement of Calculate small transmitting loop gain from bandwidth measurement – owenduffy.net
  • Review of Banggood digital clock kit #2 – owenduffy.net
  • Review of Banggood digital clock kit – owenduffy.net
  • VK3YE’s 3m circumference copper tube loop with RG213 stub tuning – owenduffy.net
  • BLDC ESC – effect of insufficient dead time – owenduffy.net
  • The half waves of coax rule for measuring VSWR accurately – owenduffy.net
  • Are gamma matches as bad as all that – owenduffy.net
  • TLW v3.24 checkout – owenduffy.net
  • Exploitation of NEC’s GM card – owenduffy.net
  • NEC – current or voltage source – owenduffy.net
  • Small Transmitting Dipole – owenduffy.net
  • LM386 audio power amplifiers – owenduffy.net
  • APRS: does pre-emphasis make much difference – owenduffy.net
  • APRS: how popular are Kenwood trackers – owenduffy.net
  • APRS: popularity of iGate system software – owenduffy.net
  • Paccomm Tiny-2 MK-II TNC review – owenduffy.net
  • A compact 3 element Yagi for 2m – owenduffy.net
  • Is the W5VJB J dipole novel – owenduffy.net
  • A response to VK3HZ’s comment on amateur licence trends – owenduffy.net
  • Australian amateur population trends 1998 – 2014 – owenduffy.net
  • The mobile APRS W2 digi left town this morning – owenduffy.net
  • Argent Data T3-135 review – owenduffy.net
  • Open squelch data carrier detect for TNC-2 – owenduffy.net
  • Foxtrak review – owenduffy.net
  • Interoperability of FoxTrak tracker and Argent Data’s OT3 – Part 1 – owenduffy.net
  • Interoperability of FoxTrak tracker and Argent Data’s OT3 – Part 2 – owenduffy.net
  • TinyTrak3 v1.42 review – owenduffy.net
  • Are inline RF wattmeters really averaging – owenduffy.net
  • Earth continuity testing of amateur equipment – owenduffy.net
  • Revision of FoxDelta null modem adapter – owenduffy.net
  • Adjusting Foxtrak tx audio using an SSB/FM receiver exploiting Bessel zeros to calibrate the modulator – owenduffy.net
  • Review of Ceramica ceramic bearing fans – owenduffy.net
  • Estimating near field strength with small antennas – owenduffy.net
  • Amateur Radio – Page 64 – owenduffy.net
  • ?s=collinear&feed=rss2
  • Ground effects on small transmitting loop efficiency – owenduffy.net
  • ESC oscillator accuracy – Silabs internal oscillator – owenduffy.net
  • Small transmitting loops and EMR safety – owenduffy.net
  • Equivalent circuit of small transmitting loop with auxiliary loop feed – owenduffy.net
  • Small transmitting loop – gamma match – owenduffy.net
  • Small transmitting loop – linear circuit analysis – owenduffy.net
  • Additional loss due to VSWR – a quite flawed concept – owenduffy.net
  • Small transmitting loop – NEC-4 analysis – owenduffy.net
  • Antennas – Page 39 – owenduffy.net
  • Electronics – Page 20 – owenduffy.net
  • T962 IR reflow oven rework – owenduffy.net
  • ARRL Test Procedures Manual (Rev L) – Noise Figure calculation – owenduffy.net
  • IC-7410 tests – 04 – Tx power & SWR meter – owenduffy.net
  • IoT – Page 3 – owenduffy.net
  • IC-7000 current consumption – owenduffy.net
  • Atten AT191 review – owenduffy.net
  • Are radio hams ‘makers’ – owenduffy.net
  • A/B comparison test on 40m – owenduffy.net
  • I2C – LCD interface – Type 1 – owenduffy.net
  • Hobbyking A30 issues – owenduffy.net
  • Some thoughts on zero crossing detection in sensorless brushless DC motors – owenduffy.net
  • COMP_PWM and SimonK ESC firmware – owenduffy.net
  • Australia’s NBN debacle limps on under a new government and new CEO – owenduffy.net
  • Hobbywing Skywalker 40A ESC – initial testing – owenduffy.net
  • Speaker cable as RF transmission line – owenduffy.net
  • HK DT750 motor, Afro30 ESC and SimonK 8c2cf42/comp_pwm – owenduffy.net
  • Windowed ladder line loss – G3TXQ – owenduffy.net
  • Review of Hakko FG-100 soldering iron thermometer – owenduffy.net
  • ESC ceramic resonator accuracy – owenduffy.net
  • Foundation watts explained – owenduffy.net
  • WSPR checkout on 30m – owenduffy.net
  • Come-along from the past – owenduffy.net
  • Adapting a 5V TTL GPS to RS232 – owenduffy.net
  • Cobwebb antenna impedance matching scheme – owenduffy.net
  • Measuring common mode current on coax – owenduffy.net
  • RG174 for portable HF operation – owenduffy.net
  • An inexpensive current limiter for flashing and initial testing of ESCs – Mk I – owenduffy.net
  • New ham licence, finally! – owenduffy.net
  • Tricopter build – 20140123 – owenduffy.net
  • SimonK ESC FW – test of commit 8873df24… – owenduffy.net
  • TV upgrade – owenduffy.net
  • Wire current rating for single FEP (Teflon) or Silicone insulated (200°) conductor in free air (30°). – owenduffy.net
  • Windowed ladder line loss – G3TXQ #2 – owenduffy.net
  • 3030 antenna – owenduffy.net
  • Foundation manual on power measurement – owenduffy.net
  • Do SWR meters make you stupid – owenduffy.net
  • Tricopter build – 20140131 – owenduffy.net
  • Small transmitting loop review – owenduffy.net
  • WIA 4:1 current balun – owenduffy.net
  • DHT22 (AM2302) input for the generic heating / cooling controller – owenduffy.net
  • Cheap and nasty 50Ω SMA terminations – owenduffy.net
  • Ground plane ham myth – inclined radials – owenduffy.net
  • MFJ-225 – sign of reactance – 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
  • Small untuned loop for receiving – owenduffy.net
  • What does an Antenna Tuning Unit (ATU) do? – owenduffy.net
  • Efficiency / gain of a Small Transmitting Loop – a worked example – owenduffy.net
  • WSPR checkout on new workstation – owenduffy.net
  • DS18B20 input for the generic heating / cooling controller – owenduffy.net
  • ARRL Antenna Book 21 on small transmitting loops – owenduffy.net
  • A QRP small transmitting loop evaluation – owenduffy.net
  • G4YDM balun – owenduffy.net
  • Another speaker mic modification to reduce RF interference – owenduffy.net
  • Speaker-microphones and DMR portables – owenduffy.net
  • Rigexpert Antscope v4.3.1 dowload link? – owenduffy.net
  • End fed matching – VK3IL design on LO1238 – owenduffy.net
  • LP-100A impedance measurement – owenduffy.net
  • Another RFI mod of a speaker mic (41-80K) for DMR use – owenduffy.net
  • COMP_PWM and SimonK ESC firmware – part 2 – owenduffy.net
  • BLHeli v11.2 damping evaluation – owenduffy.net
  • Robust programming of Silabs based BLHeli ESCs – owenduffy.net
  • LED lighting woes – owenduffy.net
  • Anatomy of an F barrel (F81) – owenduffy.net
  • Reflected power alarm for the MFJ-993B – owenduffy.net
  • Backup options for NBN VDSL access – owenduffy.net
  • mpd on a RPi, streamripper and sox – owenduffy.net
  • OCF short vertical dipole for HF – owenduffy.net
  • Toshiba alkaline AA leakage problems – owenduffy.net
  • NEC GM, GX tutorial – owenduffy.net
  • End fed half wave – NEC models for 20m – owenduffy.net
  • Cooling an IC2200H – owenduffy.net
  • Thinking about vibration forces from a bent prop adapter – owenduffy.net
  • Cleanflight and PPM – 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
  • Dataflash on NAZE32 – owenduffy.net
  • Coax switches – is shorting unused port necessary for isolation? – owenduffy.net
  • Chinese AD8307 power measurement module #4 – owenduffy.net
  • W2AU 1:1 voltage balun – owenduffy.net
  • PAROT with transformerless power supply and 230V AC relay – owenduffy.net
  • Expected ambient noise – in practice – owenduffy.net
  • Expected ambient noise – owenduffy.net
  • Review of Dunlavy’s STL patent gain claims – owenduffy.net
  • Exploiting your antenna analyser #18 – owenduffy.net
  • Exploiting your antenna analyser #17 – owenduffy.net
  • Fox flasher MkII – high power 2 LED solar powered beacon – owenduffy.net
  • Exploiting your antenna analyser #16 – owenduffy.net
  • Revised thinking on STC chips – owenduffy.net
  • Exploiting your antenna analyser #4 – owenduffy.net
  • Exploiting your antenna analyser #3 – owenduffy.net
  • Exploiting your antenna analyser #2 – owenduffy.net
  • Exploiting your antenna analyser #1 – owenduffy.net
  • Review of Austin et al paper “Loss mechanisms in the electrically small loop antenna” – owenduffy.net
  • Underhill on Small Transmitting Loop efficiency – owenduffy.net
  • The BLHeli sojourn is over – owenduffy.net
  • BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003 – #2 – owenduffy.net
  • NAZE32 / Cleanflight trial – owenduffy.net
  • A method for initial ground loss estimates for an STL – owenduffy.net
  • Fox flasher MkII #3 – owenduffy.net
  • Matching a quarter wave monopole with two variable caps – owenduffy.net
  • Fox flasher MkII #2 – owenduffy.net
  • Differential and common mode components of current in a two wire transmission line – owenduffy.net
  • Capturing the AVR hex file built by Arduino on Windows – owenduffy.net
  • VSWR curve of a simple series resonant antenna – owenduffy.net
  • Coupled coils – a challenge for hams! – owenduffy.net
  • An inexpensive Chinese regulated power supply kit. – owenduffy.net
  • BLHeli on Hobbyking 40A ESC 4A UBEC 9261000003 – owenduffy.net
  • Comparison of SimonK and BLHeli on an Afro30 ESC – owenduffy.net
  • Exploitation of NEC’s GM card #2 – owenduffy.net
  • APRS traffic study – VK2OMD-3 08/02/2015 – owenduffy.net
  • APRS traffic study – VK2OMD-3 11/10/2014 – owenduffy.net
  • Comparison of two small transmitting loops – owenduffy.net
  • BNC 75/50 compatibility – owenduffy.net
  • Low power Guanella 1:1 tuner balun using a pair of Fair-rite 2643625102 suppression sleeves – owenduffy.net
  • Radcom review of Alpha Antenna microtune magnetic loop – owenduffy.net
  • Another Osram e-ballast bites the dust – owenduffy.net
  • An example of Eb/N0 design with the Field strength / receive power converter – owenduffy.net
  • Packet loss by digi collision – owenduffy.net
  • Another Argent Data T3 incompatibility – owenduffy.net
  • APRS: how many digi hops to make it to APRS-IS – owenduffy.net
  • The future of APRS is here… – owenduffy.net
  • A simple preamp for dynamic capsules to suit radios using electret microphones – owenduffy.net
  • TNC-X – channel access behaviour – owenduffy.net
  • Does anyone assess to their digi / iGate performance? – owenduffy.net
  • Ubuntu LTS upgrades get better – v14.04 – owenduffy.net
  • Open squelch DCD for Paccomm Tiny2 Mk2 – owenduffy.net
  • Unun on 13m (43′) vertical – owenduffy.net
  • Ground effects on KP4MD’s 0.9m loop on 28MHz – owenduffy.net
  • Amateur Radio – Page 63 – owenduffy.net
  • Small transmitting loop EMR safety – EMR Calc predictions – owenduffy.net
  • Validation of loop efficiency calculator – owenduffy.net
  • Simple resonators might not appear as such initially – owenduffy.net
  • Coax connectors and accurate / repeatable measurements – owenduffy.net
  • SimonK ESC FW – test of commit 1f75da – #3 – owenduffy.net
  • BLHeli v11.0 on APM X450 quad – owenduffy.net
  • ON9CVD on baluns – owenduffy.net
  • The magic of small transmitting loops – owenduffy.net
  • OCF dipoles – owenduffy.net
  • (How) does this balun work? – owenduffy.net
  • SimonK ESC FW – test of commit 1f75da – #2 – owenduffy.net
  • Assembling clamp type coax connectors – owenduffy.net
  • An inexpensive current limiter for flashing and initial testing of ESCs – Mk II – owenduffy.net
  • Mag loop or radiating dummy load? – owenduffy.net
  • PIK and auto-space – owenduffy.net
  • Trying to make sense of the VE7BQH Yagi performance tables – owenduffy.net
  • EME path calculation based on G/T – owenduffy.net
  • Simple Morse beacon keyer updated 2014/03/01 – owenduffy.net
  • Analysers – help or hindrance – owenduffy.net
  • VK2OMD G5RV with tuned feeder – line loss – owenduffy.net
  • Using Ohms law on antenna baluns – owenduffy.net
  • DJ9BV & F6HYE G/T formula – owenduffy.net
  • Update for NFM software (v1.18.0) – owenduffy.net
  • High performance 144MHz transverter design workup – noise and gain analysis – owenduffy.net
  • Checkout of EMRCalc quiet solar flux report – owenduffy.net
  • G5RV woes – W6OGC – owenduffy.net
  • Measuring G/T – owenduffy.net
  • DJ3JJ’s 432MHz EME Yagi article in Dubus 1/2010 – owenduffy.net
  • SimonK ESC FW – test of commit 1f75da – #4 – owenduffy.net
  • Slot car controller connectors – AU – owenduffy.net
  • Mining K5SO’s measurements of Sun noise – owenduffy.net
  • EMECalc v9.09 reconciliation issue – owenduffy.net
  • • wp-includes/1 page
    • wlwmanifest.xml
    • wp-content/
    • • uploads/
      • • 2014/
        • • 05/1 page
          • VSWRCurveDerivation.pdf
          • 10/1 page
          • VHF-APRS-traffic-study-VK2OMD-3-11_10_2014-.pdf
        • 2015/
        • • 02/1 page
          • VHF-APRS-traffic-study-VK2OMD-3-08_02_2015-.pdf
  • calc/49 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)
  • Calculate ferrite cored inductor - ΣA/l or Σl/A
  • 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
  • Calculate VSWR and Return Loss from Zload (or Yload or S11) 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 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
  • ITU P.372-13 Figure 10
  • Find -3dB frequencies from rise time or decay time
  • Calculate G/T from Sun noise Y measurement
  • • qsrf/2 pages
    • Quiet sun radio flux interpolations
    • Quiet sun radio flux interpolations
    • awcc/1 page
    • Antenna wire catenary calculator
    • tl/13 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 calculator help
    • TLLC help
    • TWLLC help
    • RF Arbitrary Transmission Line Loss Calculator
    • TLLC help
    • mu/1 page
    • Permeability interpolations
  • bpl/14 pages
  • 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
  • files/11 pages
  • NoiseMeasurementUncertainty.pdf
  • EstimateZFerriteToroidInductor.pdf
  • AvoidingFlashoverInBalunsAndAtus.pdf
  • Counterpoise.pdf
  • GuanellaBalun01.pdf
  • MllFromZin.pdf
  • DirectionalWattmeter.pdf
  • SilverAlkalineCells.pdf
  • An%20analysis%20of%20current%20flow%20at%20the%20end%20of%20shielded%20twin%20line%20at%20radio%20frequencies.pdf
  • CoaxTrap01.pdf
  • NoiseAndReceivers.pdf
  • • aprx/21 pages
    • Index of /files/aprx
    • Index of /files/aprx
    • Index of /files/aprx
    • Index of /files/aprx
    • Index of /files/aprx
    • aprx_2.09.652_armhf.changes
    • 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
  • module/
  • • pik/3 pages
    • PIK - PIC Iambic Keyer
    • pik011.pdf
    • PIK timing
    • • VK3XU/1 page
      • VK3XU's PIK with integral iambic paddles
    • icm/2 pages
    • Measuring common mode current
    • Icm40.pdf
  • map/5 pages
  • 20160204
  • VK4MQ+VK2OL-2015
  • 20160630
  • 20151028
  • 20151029

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