John, The "no frills" one transistor circuit can be found at http://www.aa5au.com/rttyinterface.html If you want to add a series resistor and a diode to protect the transistor from negative voltage excursions, take a look at the circuit for PTT in http://www.qsl.net/w/wm2u/psk31.html. There are also optocoupler solutions that do the same function.
73, Don W3FPR On 8/7/2012 6:27 PM, John Shadle wrote: > Thanks, Don. Are you talking about the "PTT IN" and "KEY OUT" RCA jacks? > > I Googled "one transistor keying circuit" and it came back with some > amplifier keying circuits. Is that what I should be looking for, or > something else? I'm sure the answer is obvious, but I'm just having a > hard time seeing it. ;-) > > Take care. > -john W4PAH > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
