RXP2600: Contest TCVR – HIGH Performance CW only Superhet + SDR 9 Mc IF + 2 xAD603 + FST3125 IQ detector H-mode mixer FSA3157 +Â ET1-6TSM20 Low cost D.D.S. Si5351 + custom low pass filters Hilbert digital F.I.R. Teensy 4.1 with custom code. Digital sampling A.G.C. Arduino nano + AD8307 Read more…
SO2R bandpass filters For Multi-Multi or SO2R operations, quality bandpass filters are needed. Not only produced harmonics have to be rejected, but any below frequencies also, to minimize distortions produced by receiver itself in presence of strong outband signals. SO2R filters 121 dB attenuation Low cost Easy to build Alignement Read more…
YO8RXP radio shack — Home made building Hardware 98% Software 99% Shack construction 96% Electric floor heating Xiaomi BLE   Wired Dallas DS18B20 temperature sensors will provide inside climate feedback towards Raspberry PI, which via power relays and contactors will start / stop about 20 square meters of Magnum heating foil Read more…
Schematics available ! At this page bottom, you can find PCB tab where one can see the schematics involved. Once software will be complete, will be available under my Github account Being a DIY hamradio, I always needed a good signal generator for HF bands and an oscilloscope too. After Read more…
Arduino A.G.C Control is in you hands. Decay time, fall time, rise time, values Arduino Nano C++ Main Loop@10Khz AD8307 Logarithmic detector, DC to 500 Mhz 12 bit MCP4725 DAC output to AD603 I.F. https://yo8rxp.com/wp-content/uploads/2022/12/VID_20221208_181755.mp4 Video with AGC voltage drop while input signal is increasing This is Work in Progress Read more…
Work in progress Contest transceiver Teensy 4.1 SDR Yet another hamradio project I am working on As hamradio, I love buiLding things ! Even it will not be a factory like tranceiver, I will give my best to be as small as possible, only few bands Will be CW only, Read more…
Hamradio and software come to life During big contests it can be useful to have a touchscreen antenna switch placed near computer keyboard to be handy. In my case I do have a relays flip wire antenna for 40 meters and East / West FB ratio is quite big as Read more…
Have a question? mailto: gabriel@yo8rxp.com My home made antenna tower Goal is to design and build a low height antenna tower , self supported and strong enough to withstand antenna, Ice, winds and my own 110 Kg weight 12 Meters height 50×50 cm square type Bottom mount rotator Vertical aligned Read more…
During big cw contests a good QRO will improve overall score. Many hams use tubes, others use transistors, home made or factory made. The bad, the good and the ugly. One should balance the price, resilience, size, noise and the heat that QRO produces.I have elected to build a home Read more…
Improving reception in CW was always a top priority of mine, contest or dx cq. Having purchased a powerfull Sota Beam Vari audio DSP for an older project, I though why not buying another one and create a true spatial diversity headphones? While is just an ideea and was not Read more…