[Elecraft] K2 CW train of dots when ptt
I made yesterday the mod suggested by Don about having an external PTT for CW, and a problem came up. After I found the problem I have had a talk with the K2 owner and he told me that the problem was present even before the mod ( He wasn't bothered about this because he doesn't go cw on air... ). Straight to the problem: When I push the new PTT in CW mode the radio starts transmitting a train of dots when in iambic mode (tried A or B, no change) and a fixed note when in straight key mode. On SSB everything seems to work good, when i press the PTT foot switch the radio goes tx regularly. I don't use an external keyer, just a bencher iambic key connected directly with the radio via the stereo jack on the rear panel. I'm pretty sure about the mod (used a BS170 instead of 2N7000 and a 74HC153 instead 74AC153 but these shouldn't be a problem) and the confirm of my friend who had this trouble before the mod made me think about investigate somewhere else. He confirmed to me that when in CW mode when he pressed the PTT on the mic the radio started transmitting dots. The key is not operational with the radio in any case (and wasn't before the mod), neither on test mode. Tried to modify QSK delay with no success. Something suggest me that the problem could be in some software configuration i can't find, or in the PTT/DOT coexistence on the same pin of the key socket. Any Idea TNX and 73 de Giulio IW3HVB -- Follow the path of the Prophets... ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K2 CW train of dots when ptt
Giulio, Yes, the ptt line of the mic is the same as the dot-paddle. This is one of the design flaws in the K2. Don Wilhelm made a beautiful mod for this, but it is not a simple one. You can see it on his website. Over to you Don. Arie PA3A -Oorspronkelijk bericht- Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Namens Giulio Pico Verzonden: zondag 25 mei 2008 18:37 Aan: elecraft@mailman.qth.net Onderwerp: [Elecraft] K2 CW train of dots when ptt I made yesterday the mod suggested by Don about having an external PTT for CW, and a problem came up. After I found the problem I have had a talk with the K2 owner and he told me that the problem was present even before the mod ( He wasn't bothered about this because he doesn't go cw on air... ). Straight to the problem: When I push the new PTT in CW mode the radio starts transmitting a train of dots when in iambic mode (tried A or B, no change) and a fixed note when in straight key mode. On SSB everything seems to work good, when i press the PTT foot switch the radio goes tx regularly. I don't use an external keyer, just a bencher iambic key connected directly with the radio via the stereo jack on the rear panel. I'm pretty sure about the mod (used a BS170 instead of 2N7000 and a 74HC153 instead 74AC153 but these shouldn't be a problem) and the confirm of my friend who had this trouble before the mod made me think about investigate somewhere else. He confirmed to me that when in CW mode when he pressed the PTT on the mic the radio started transmitting dots. The key is not operational with the radio in any case (and wasn't before the mod), neither on test mode. Tried to modify QSK delay with no success. Something suggest me that the problem could be in some software configuration i can't find, or in the PTT/DOT coexistence on the same pin of the key socket. Any Idea TNX and 73 de Giulio IW3HVB -- Follow the path of the Prophets... ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K2 CW train of dots when ptt
2008/5/25 Arie Kleingeld PA3A [EMAIL PROTECTED]: Giulio, Yes, the ptt line of the mic is the same as the dot-paddle. This is one of the design flaws in the K2. Don Wilhelm made a beautiful mod for this, but it is not a simple one. You can see it on his website. The mod I was referring on the msg was exactly the one suggested by Don, but still the problem seems to remain, altough the ptt input on the new board works fine on ssb. 73 de Giulio IW3HVB ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
