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21. Re: [Amps] Relays (score: 1): Author: Paul Kelley N1BUG <paul.kelley.n1bug@gmail.com>; Date: Sun, 30 Mar 2008 14:09:43 -0400; Thanks Tim, That is reassuring. I have been using RJ1A relays in my HF single 4CX1500B for some time and have yet to experience a failure. I run QSK CW frequently. I am also using them on my new 6m 4; /archives//html/Amps/2008-03/msg00361.html (9,354 bytes)
22. Re: [Amps] Relays (score: 1): Author: "Tim Duffy K3LR" <k3lr@k3lr.com>; Date: Sun, 30 Mar 2008 13:14:54 -0500; Hello Paul! The rig delay of only 3 Ms could be a real problem. We never run QSK, so I am sure that helps prolong the life of the relays in use at K3LR. The K3LR Icom radios and computer CW keyers an; /archives//html/Amps/2008-03/msg00362.html (10,602 bytes)
23. Re: [Amps] Relays (score: 1): Author: "David Cutter" <d.cutter@ntlworld.com>; Date: Sun, 30 Mar 2008 19:28:10 +0100; Tim Do you ever use foot-operated PTT ? I am always a little suspicious that the brain gets the voice to start before the foot gets the switch to the floor. When ms count, the 11ms from brain to foot; /archives//html/Amps/2008-03/msg00364.html (8,408 bytes)
24. Re: [Amps] Relays (score: 1): Author: "Tim Duffy K3LR" <k3lr@k3lr.com>; Date: Sun, 30 Mar 2008 13:42:45 -0500; Yes, we use foot switches on SSB. This has not been a problem for hot switching for us. There is a small delay from when PTT is actuated in the radio and when RF production starts, so we are all OK.; /archives//html/Amps/2008-03/msg00365.html (9,378 bytes)
25. Re: [Amps] Relays (score: 1): Author: "David Cutter" <d.cutter@ntlworld.com>; Date: Sun, 30 Mar 2008 19:50:14 +0100; Sorry to labour the point, but, how do you guarantee that? Is it a question of operator training? David G3UNA _______________________________________________ Amps mailing list Amps@contesting.com htt; /archives//html/Amps/2008-03/msg00366.html (9,595 bytes)
26. Re: [Amps] Relays (score: 1): Author: Jan Erik Holm <sm2ekm@telia.com>; Date: Sun, 30 Mar 2008 20:59:02 +0200; I also use VOX PTT anf foot switch PTT, never had a problem. I have a number of different amplifiers using RJ1A relays etc etc, however I never use QSK. As with everything in life some people will me; /archives//html/Amps/2008-03/msg00367.html (8,838 bytes)
27. Re: [Amps] Relays (score: 1): Author: "David Cutter" <d.cutter@ntlworld.com>; Date: Sun, 30 Mar 2008 20:09:21 +0100; Not a nice thing to do in the middle of a contest, though. David G3UNA _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listin; /archives//html/Amps/2008-03/msg00368.html (9,410 bytes)
28. Re: [Amps] Relays (score: 1): Author: Jan Erik Holm <sm2ekm@telia.com>; Date: Sun, 30 Mar 2008 21:17:14 +0200; True of course. However if we need 100% percent security we have to have backup units. That´s a decision we have to make, it´s a matter of how important we think it is. ______________________________; /archives//html/Amps/2008-03/msg00369.html (9,162 bytes)
29. Re: [Amps] Relays (score: 1): Author: Mike Bondarev <mikebond@mosfirm.ru>; Date: Sun, 30 Mar 2008 23:51:08 +0400; Hi group! I use RJ1A in my home made PA with GU-84B with 2+ KW out and I don't have had any fault since I start to use this amp more then one year ago. I don't use full QSK but only semi bk-in. I thi; /archives//html/Amps/2008-03/msg00370.html (8,429 bytes)
30. Re: [Amps] Relays (score: 1): Author: "W7RY" <w7ry@arrl.net>; Date: Sun, 30 Mar 2008 13:09:02 -0700; Take a look at the WD7S site. A great discussion and actual timing of vacuum relays. http://home.earthlink.net/~wd7s/updates.htm If your vacuum relays are failing, perhaps they were defective to star; /archives//html/Amps/2008-03/msg00371.html (9,608 bytes)
31. Re: [Amps] Relays (score: 1): Author: "jeremy-ca" <km1h@jeremy.mv.com>; Date: Sun, 30 Mar 2008 16:25:58 -0400; " As you point out, radio + amplifier "handshaking is important" That is what Ive suspected all along but havent verified the timing. Once replaced when time matters it sort of gets ignored for a few; /archives//html/Amps/2008-03/msg00372.html (13,322 bytes)
32. Re: [Amps] Relays (score: 1): Author: "Dick Green WC1M" <wc1m@msn.com>; Date: Sun, 30 Mar 2008 16:32:20 -0400; Some QSK amps increase the vacuum relay coil voltage to make it switch faster -- on the order of 1-2 ms. 73, Dick WC1M _______________________________________________ Amps mailing list Amps@contestin; /archives//html/Amps/2008-03/msg00373.html (12,445 bytes)
33. Re: [Amps] Relays (score: 1): Author: Larry Benko <xxw0qe@comcast.net>; Date: Sun, 30 Mar 2008 16:17:02 -0600; I was interested in the same topic a few years ago and I made a bunch of measurements on some Icom radios. Look at http://www.bnk.com/W0QE/Radio_Measurements/amplifier_timing.html Bottom line was for; /archives//html/Amps/2008-03/msg00374.html (11,314 bytes)
34. Re: [Amps] Relays (score: 1): Author: "k7rdx" <k7rdx@charter.net>; Date: Sun, 30 Mar 2008 17:36:30 -0700; Very nice construction Mike..Very well thought out design and workmanship!73,Jim K7RDX.... -- Original Message -- From: "Mike Bondarev" <mikebond@mosfirm.ru> To: "'Amps'" <Amps@contesting.com> Sent:; /archives//html/Amps/2008-03/msg00375.html (9,386 bytes)
35. Re: [Amps] Relays (score: 1): Author: "Gary Hinson" <Gary@isect.com>; Date: Mon, 31 Mar 2008 21:57:04 +1300; Thanks all for the excellent advice and links on T/R relays and switching times. A wealth of knowledge. That fascinating thread has perhaps delayed the day when I either rig-up a test circuit to chec; /archives//html/Amps/2008-03/msg00380.html (9,886 bytes)
36. Re: [Amps] Relays (score: 1): Author: "Han Higasa" <higasa@plum.ocn.ne.jp>; Date: Mon, 31 Mar 2008 18:57:00 +0900; Hi all, I am also using HC1s and RJ1As for a line-in relay of my amp. I am not using it for full break-in but it is working so reliable, without any trouble for many years. a few points: 1. Whatever; /archives//html/Amps/2008-03/msg00381.html (10,122 bytes)
37. Re: [Amps] Relays (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 31 Mar 2008 07:15:36 -0400; Gary, one root-cause of an R.F. vacuum relay's premature demise is related to hot-switching. Oftentimes, the operator doesn't know its occurring. About ten years ago, I downloaded a firmware upgrade; /archives//html/Amps/2008-03/msg00382.html (9,333 bytes)
38. Re: [Amps] Relays (score: 1): Author: Rob Flory <robandpj@earthlink.net>; Date: Mon, 31 Mar 2008 07:39:56 -0400 (GMT-04:00); At WW2Y/K2WI/N2NU contest stations, we found that the Titan 425 did not switch fast enough for the rigs we were using. We placed a speed-up diode from the keying output of the keyer to the PTT of the; /archives//html/Amps/2008-03/msg00383.html (8,222 bytes)
39. Re: [Amps] Relays (score: 1): Author: Paul Kelley N1BUG <paul.kelley.n1bug@gmail.com>; Date: Mon, 31 Mar 2008 07:47:12 -0400; Nice work Larry. I haven't personally tested enough radios to be sure but I have a strong hunch most of the newer radios are better than some of the older ones in this respect. The radio with 3 ms wa; /archives//html/Amps/2008-03/msg00384.html (9,904 bytes)
40. Re: [Amps] Relays (score: 1): Author: Roger D Johnson <n1rj@roadrunner.com>; Date: Mon, 31 Mar 2008 08:33:13 -0400; My old TS-940 actuated the internal relay from a line that went positive 3ms after keydown. Add 2 ms for the relay to actuate and the relay pulled in about 5ms from keydown. The 940 produced RF 6ms a; /archives//html/Amps/2008-03/msg00385.html (8,994 bytes)

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