Johnson's Techworld

VU3GEX had painstakingly compiled several of these LMR SDR 1.1 kits and distributed it to several potential homebrewers in 2023. Some of them moved on to other projects

Adruino IDE in laptop Easy BITX not there after uploading Si5351 calibration sketch Signal from Si5351 in Raduino picked up by FT-710 used as frequency counter Arduino Serial

Last time when I tried a Space Station pass, I was receiving a few stations, but could not reach them. This time it was a high elevation pass

N2YO.COM is my favourite site for checking amateur radio satellite passes, especially International Space Station. Today when I visited that site for checking a Space Station pass which

QRP or low power operations are quite popular abroad, especially for portable operations like Parks on the Air. I was also a regular QRP operator when I started

Used my FT-710 radio to check the transmitted signal and spectral spread of my homebrew Easy BITX SSB signal. 18 dB attenuator was used in FT-710 to reduce

Straight calculation is 4V into 50Ω = 0.32 W, provided, the RF probe is showing the accurate RF voltage! I am on the lookout for a 6V bulb

I was hearing a lot of activity on 40m band with several nets and other ragchew going on. Suddenly the signals started dropping with the waterfall becoming almost

Compared the RF voltage at the inputs of IRF510 and that of the Darlington pair of 2N3904s before that, using N5ESE Classic RF probe homebrewed by me. RF

This is the LMR SDR 1.1 PCB which I bought from VU3ZOF. I have bought five ICs also along with it, which are difficult to source otherwise. Si5351