Some radios can send CW with a straight key if you select CW and then key the PTT line.
Gerry Sherman
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On 2025-04-12 15:36, Tom Sevart via groups.io wrote:
Hi all,
A while back at a hamfest I picked up a mystery radio being sold by a guy selling items from an SK's estate.? He didn't know what it was at all, so I got a good price on it.? Bringing it home, I found out that it's a BitX40 v3.
The builder didn't label any of the buttons or knobs on the radio, so I had to figure those out myself.? Got it all sorted out except for one switch that goes to another smaller board under the main PC board, but that'll be a question for another time.? There apparently have been multiple mods done by the original builder to the radio, but so far I haven't been able to reverse engineer what's been done to it.? It does work great and has great receive audio as well as good transmit audio.
Right now, the things I want to figure out is how much power output the radio should have.? All other Bitx's I've had are 10W output, but this one seems to only be 5W with one IRF510 final. If 5W is what I can expect out of this radio, then fine. I was making contacts on a net last night.
The radio was built without having a hookup for a CW key.? I'd like to install a CW jack so I can operate CW with it.? I did find a schematic but can't seem to find where to hook up a key to the circuit.
Any help appreciated.
