RF Sampler
A DIY RF sampler with -50db sampling out, most beneficial for measuring the output of HF radio PA section using Spectrum Analyzer. Also can be used for Pure Signal transmission.
K9AY Receive loop antenna
In 2022 I made one 200m long beverage antenna for our IOTA (S21DX, 2022) which was around 2m high from ground. For some reason (most probably very high conductive wet…
Homebrew 3 elements 10m Yagi antenna
When S21DW heard that I am planning to make an 3 elements short beam for 10m to replace my 2 elements 10m antenna he immediately jumped to make it asap.…
S21RC Digital Interface Rev 3.0 (Ham Radio – Computer)
Fully isolated interface between Radio and Computer for various digital mode.Radio Side connection:Gnd (isolated from Computer ground)Audio IN/OUT (Isolated by audio transformer)CAT RX-TX and/or CIV: (Isolated optically)PTT and COS (Isolated…
Dead ICOM IC-7000 radio, Click Click from the relay
This was posted on my old website back in 2009. One lovely sunny weekends morning I found my 6 months old ICOM IC-7000 is not turning on. Something is wrong,…