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1. [Amps] ICOM PRO III QSK (score: 1): Author: rick darwicki <n6pe@yahoo.com>; Date: Wed, 7 Dec 2011 11:12:22 -0800 (PST); Hi all, Does anyone know it the timing on the ICOM PRO III linear amplifier SEND line is such that the AMP will not be hot switched on FULL BREAK IN? I have an old Alpha 76 and can install vacuum; /archives//html/Amps/2011-12/msg00067.html (7,288 bytes)
2. Re: [Amps] ICOM PRO III QSK (score: 1): Author: "Jim W7RY" <jimw7ry@gmail.com>; Date: Thu, 8 Dec 2011 17:06:34 -0800; the PRO III uses a relay for the send jack. I always use the T8V from one of the aux jacks to key my amplifiers. I'm sure the relay in the PRO III is pretty fast, 4-5 ms, but every little bit counts.; /archives//html/Amps/2011-12/msg00074.html (8,343 bytes)
3. Re: [Amps] ICOM PRO III QSK (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 09 Dec 2011 10:12:31 -0500; I don't have the link at hand or time to go looking for it right now but I've seen a rather extensive examination of T/R switching that shows the Icom rigs generally hot switch on returning to receiv; /archives//html/Amps/2011-12/msg00076.html (8,250 bytes)
4. Re: [Amps] ICOM PRO III QSK (score: 1): Author: "Jim W7RY" <jimw7ry@gmail.com>; Date: Fri, 9 Dec 2011 07:36:34 -0800; I have seen that too but it was strictly limited to the IC-7000. 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/; /archives//html/Amps/2011-12/msg00078.html (10,608 bytes)
5. Re: [Amps] ICOM PRO III QSK (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 09 Dec 2011 11:01:59 -0500; The study I saw (not the AD5X article) was not limited to the IC-7000. The "premature release" applied to all of the "small" radios 706/7000 as well as several of the full size radios - including 77; /archives//html/Amps/2011-12/msg00080.html (11,070 bytes)
6. Re: [Amps] ICOM PRO III QSK (score: 1): Author: Larry Benko <xxw0qe@comcast.net>; Date: Fri, 09 Dec 2011 09:10:49 -0700; Joe, I made measurements on a lot of transceivers which can be seen at http://www.w0qe.com/amplifier_timing.html It needs a little updating but might be useful. 73, Larry, W0QE ______________________; /archives//html/Amps/2011-12/msg00081.html (10,065 bytes)
7. Re: [Amps] ICOM PRO III QSK (score: 1): Author: "Jim W7RY" <jimw7ry@gmail.com>; Date: Fri, 9 Dec 2011 09:23:28 -0800; Here is the site I was thinking of: http://w0qe.com/amplifier_timing.html 73 Jim W7RY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com; /archives//html/Amps/2011-12/msg00082.html (12,222 bytes)
8. Re: [Amps] ICOM PRO III QSK (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Fri, 09 Dec 2011 12:40:24 -0500; Yes, that's one of the sites I was looking for. You will notice that in all of the Icom radios shown, *including* the IC-746Pro and 756Pro, the HSEND line (cyan in the scope pictures) went high betw; /archives//html/Amps/2011-12/msg00083.html (13,270 bytes)
9. Re: [Amps] ICOM PRO III QSK (score: 1): Author: "Jim W7RY" <jimw7ry@gmail.com>; Date: Fri, 9 Dec 2011 14:53:04 -0800; I've not used the H-Send line. I like to use the T8 line. It would be interesting to tap it and make the same tests. 73 Jim W7RY _______________________________________________ Amps mailing list Amps; /archives//html/Amps/2011-12/msg00084.html (14,595 bytes)
10. Re: [Amps] ICOM PRO III QSK (score: 1): Author: "Jim W7RY" <jimw7ry@gmail.com>; Date: Fri, 9 Dec 2011 20:41:49 -0800; Transmit 8 Volt line... Which goes to +8 volts DC when put into transmit mode. On the schematic, it's depicted at T8. 73 Jim W7RY What do you mean by the T8 line? Rick, N6PE == I've not used the H-Se; /archives//html/Amps/2011-12/msg00086.html (15,333 bytes)
11. Re: [Amps] ICOM PRO III QSK (score: 1): Author: "Jim W7RY" <jimw7ry@gmail.com>; Date: Sat, 10 Dec 2011 21:11:53 -0800; Larry.. I observed the same timing on my 7000. But if you measure T8, (8 volts on transmit) I think you will find that the RF does not continue after T8 goes back low. I also measured the 7200. T8 is; /archives//html/Amps/2011-12/msg00090.html (11,890 bytes)
12. Re: [Amps] ICOM PRO III QSK (score: 1): Author: Larry Benko <xxw0qe@comcast.net>; Date: Sat, 10 Dec 2011 22:49:40 -0700; Jim, I haven't seen a radio which brings T8 outside of the radio which may not be of importance to you. Additionally T8 and R8 control the radio mode so T8 might not actually coincide with the RF exa; /archives//html/Amps/2011-12/msg00091.html (12,970 bytes)
13. Re: [Amps] ICOM PRO III QSK (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Sun, 11 Dec 2011 07:32:53 +0000; Would it help to connect the two outputs in parallel, to get the fastest possible turn-on from HSEND, and then a slightly delayed release from the relay? HSEND -> [transistor switch] -> [ACC output i; /archives//html/Amps/2011-12/msg00093.html (9,021 bytes)
14. Re: [Amps] ICOM PRO III QSK (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sun, 11 Dec 2011 13:47:08 -0500; HSEND *is* the ACC output. HSEND = HF SEND on the rigs with 144 MHz and higher as they also have a VSEND (VHF SEND), typically for 144 and 430 MHz. For the HF or HF and 50 MHz only transceivers the; /archives//html/Amps/2011-12/msg00095.html (9,787 bytes)
15. [Amps] ICOM PRO III QSK (score: 1): Author: "Phil & Debbie Salas" <dpsalas@tx.rr.com>; Date: Mon, 12 Dec 2011 07:45:26 -0600; The "Flexible Amplifier QSK Keying Interface" article on my website shows that the IC-7600 also has the premature release problem. Phil - AD5X _______________________________________________ Amps mai; /archives//html/Amps/2011-12/msg00097.html (6,441 bytes)
16. Re: [Amps] ICOM PRO III QSK (score: 1): Author: Roger Parsons <ve3zi@yahoo.com>; Date: Mon, 12 Dec 2011 09:33:15 -0800 (PST); For what it's worth, the IC765 and the IC728 (at least) also have exactly the same problem - so it goes back quite a long way. 73 Roger VE3ZI _______________________________________________ Amps mail; /archives//html/Amps/2011-12/msg00098.html (8,130 bytes)

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