[TRLog] Re: COM port CW keyer
Mon, 20 Jul 1998 20:57:43 -0600
>Marty KM7W wrote:
>> I'd like to try to use the CW features of the contest logging software.
>> I have a design from TRLog, which indicates a CW and PTT interface.
>> With the TS-50, I only need one (I think) that will act as a tip positive
>> straight key.
>> Can I disregard the PTT stuff when I put this together (what could be
>> simpler than a 2n2222 and a 1K resistor?)
>Yes. I don't bother with the PTT interface.
You can also use an opto-coupler to isolate the COM port from the radio.
Helps keep RF from floating around in the PC or blowing the ports. A
schematic for it (COM or LPT port) is on my web site:
>> Also, with this design, how can I "Y" connect my normal paddles/keyer
>> in line? I'd think this is necessary ...
When I make the TRLog 'keyer' I put a double 'Y' on the radio end of the
cable with the regular radio plug, with in-line JACKS for RCA and 1/4"
plugs.. That way I I can connect any keyer in parallel with the keying
output of TRLog (I like having a separate keyer so I can change th speed
73 -- Glenn
Another month ends... All targets met, all systems
working, all customers satisfied, all staff eager and
enthusiastic. All pigs fed and ready to fly.
AE0Q / V31RY ex: GM5BKC, ZB2WZ, SV0WY, WA0VPK
email@example.com --SOWP 5558-M, QCWA LM, ARRL LM, NCVA--
FAQ on WWW: http://www.contesting.com/trlogfaq.html
Administrative requests: trlog-REQUEST@contesting.com
Feature Wishlist: http://web.jzap.com/n6tr/trwish.html