Links to SotaBeams switched attenuator (switched in by relay on transmit/switched out when not transmitting, on receive)
?
The schematic should? be straight forward to homebrew ugly/Manhattan style, with individual choice of attenuation level(s), and? powered by a battery.
In fact this is just what I plan to build very soon for QRPp WSPR but should be fine for CW
73
Chris
m0pzc
Chris m0pzc