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: Scrapping a Classic
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If there's a good side to this ending, it's the plethora of parts that will
eventually be available to others trying to keep their 300J, 20V-2, or 21E
goin...
3 hours ago