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Homepage Last updated: 2018, May 18
Total pages: 2104

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137700Osc2 pages
         
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 timing
pik001.pdf
PIK - PIC Iambic Keyer
pik011.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)
              
files7 pages
gpsppsu.hex
tn25.hex
tn45.hex
tn85.hex
8MHz.hex
10MHz.hex
12.8MHz.hex
         
hwpt1 page
Hand wound power transformers
         
ArduinoThermometer1 page
Arduino thermometer - a tutorial
         
hcctl1 page
Generic heating / cooling controller
         
parot1 page
Power Amplifier Run On Timer (PAROT)
              
files3 pages
parot.hex
10s.parot
180s.parot
         
ArduinoRTC1 page
Arduino Real Time Clock - a tutorial
         
ArduinoMag1 page
Arduino Magnetometer - a tutorial
         
PA0KLTSynth1 page
PA0KLT Si570 Synthesiser - VK1OD implementation
         
ArduinoStepper1 page
Arduino stepper motor driver - a tutorial
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