Don - I found it very helpful to have a local look at my keying waveform on his IC7800 as I adjusted the PTT timing, to make sure the amp was not switching when RF was present. -Dave- K9FN
Sent from my Samsung smartphone on AT&T Don Wilhelm <w3...@embarqmail.com> wrote: >Don, > >You should have the amp's keyin (or PTT) keyed with the K3 KEYOUT >signal. If you have it that way, you are "doing it right" > >Not all amps are capable of QSK because they use big, clunky, open frame >relays that take a considerable amount of time to pull in and the >contacts stop bouncing. It sounds like you have one of those. Your >choice of semi-breakin helps on the trailing edge of your keying, but >you really need help on the leading edge of keying to keep your amp's >relay from "hot switching" - that is a condition where RF is present at >the relay contacts before the relay contacts have positively closed. > >You can upgrade the amp's relays to a use faster relays or add a QSK kit >to your amplifier, or you can set the K3 for semi-breakin (as you have >done), but consider that on the leading edge of your keying, RF may be >presented to the amplifier before the relay contacts have stopped >bouncing - the K3 allows you delay the onset of RF to compensate for >that condition. See the TX DLY menu setting on page 61 of the manual. > >73, >Don W3FPR > >On 3/17/2012 7:49 AM, gold...@charter.net wrote: >> I am attempting to slowly learn to work with CW but at first it is with >> a computer program but I am not sure if that is relevant. >> >> I understand the reason for break in as it allows for RX listening >> between your TX in case someone it trying to contact your. >> >> The issue is that when using VOX and with semi or full breakin when >> using my amp the relays in the amp are clicking and clacking like crazy >> which to me seems very abusive to the amp. My solution has been to go >> to semi break in and then set a long delay time so the amp and K3 stay >> keyed. >> >> The amp is an SGC powercube and I do have it wired to the K3 so it gets >> a PTT signal. >> >> Am I doing the right thing with the delay or are there other ways to >> stop the amp from going nuts or is this just the nature of the beast. >> >> >> ~73 >> Don >> KD8NNU >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
