In talks with Joachim, PA1GSJ we decided to build the simplest possible (construction wise) transmitter for 28MHz.
Using a "canned" - in my case IC-like housing - oscillator on 28.322 MHz and a 74HC(T)240 as the "power amplifier" it is possible to get an output of around 50 mW, sufficient for a QRSS MEPT.
Joachim already has his model working, and I am in the process of building mine. The oscillator is there (duh)and the "PA" is just about wired, now I need to make the keyer , will be using a PICAXE processor, and the output matching circuit/low pass filter.
Notice: 145 MHz Activity Period for the UK & Ireland - Sun 26th Jan 2025
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The *145 Alive Group* are organising an activity period on the 2m amateur
radio band in the UK & Ireland on *Sunday the 26th of January 2025* from
12:00 ...
12 hours ago
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