I'm finally working on the PTT T/R circuit for my homebrew DSB /Direct conversion 30 meter transceiver. I hope to use the simple one transistor circuit from W3PM's FB HB WSPR rig.
But I need info on the PTT signal that will come from the computer serial port. Which pins on the 9 pin serial port connector? What kind of signal comes out? Is it 5 volts on transmit? What settings should I use in WSPR? RTS? Any other setting changes needed?
I hope to be transmitting AND receiving soon.
Re: Fair Radio and Dayton Hamfest Photos May 2024
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Thanks—excellent pictures. I see many items that probably would have
followed me home, for better or worse.
#4828 and #4829: Nice old homebrew, with turns...
3 hours ago