26 Jun
2018
26 Jun
'18
2:41 a.m.
I built my second Es'hail-2 transverter with easy available building blocks and junk box / flea market components.
I consider the future (narrow band) transponder as a 'normal' amateur band (with latency) and therefore will operate 'simplex'.
This means the LO frequencies are switched by the PTT (TX-enable).
Picture: https://pbs.twimg.com/media/DgZGilPWsAAWSQh.jpg:large
Some technical details: RX / TX LO: ADF4351, programmed by an ATTiny13a TX mixer: HMC213 RX mixer: home brew with ADE-1 + J310 HPA: surplus ex-UMTS module (P-1 dB @2400 MHz = 10W) IF RX / TX: 432 MHz (or something else) Dish feed: 6t 2.4 GHz LHCP helix and 10 GHz LNB 'peek a booing' through the helix
73, Remco PA3FYM