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.
FT8 it's a winner! - 28 MHz FT8 mode last night open to VO1NE GN27 S.A. PY LU CX CE good signals after repairing the wire antennas damaged in the storm last week 80m...
1 day ago