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381. [AMPS] Alpha (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 3 Jan 2001 13:29:17 -0500; The key is to have a gap that always breaks down at less voltage than the switch. Not doing that is just Goofy. (sorry Mini) 73, Tom W8JI w8ji@contesting.com -- FAQ on WWW: http://www.contesting.com; /archives//html/Amps/2001-01/msg00105.html (7,411 bytes)
382. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 3 Jan 2001 18:08:06 -0500; Hi Paul, First, run only 12 volts if you can. The more voltage the bigger the pulse. Second, apply a fixed external negative bias on the ALC input line on the radio. Set it to limit power to a safe v; /archives//html/Amps/2001-01/msg00109.html (8,409 bytes)
383. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 4 Jan 2001 00:00:06 -0500; No, you misunderstood me. I meant to use all three! By all means apply fixed negative ALC bias to the radio. The good effect of that is you hold the gain back even before the radio comes on. The bad; /archives//html/Amps/2001-01/msg00118.html (8,724 bytes)
384. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 4 Jan 2001 00:00:06 -0500; Wil, I have a 706 and a 706MKII They both pulse all the way up to 150 watts or more (depending on supply V) when initially keyed no matter what power I set them at. I can set them at 10 watts, and t; /archives//html/Amps/2001-01/msg00119.html (8,825 bytes)
385. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 4 Jan 2001 06:03:47 -0500; Two problems: 1.) A 7% spike is still a 14% power increase. 2.) You can not accurately read the spike on a non-peak-storage device. A non-storage scope simply is not fast enough. Less than a millise; /archives//html/Amps/2001-01/msg00122.html (9,397 bytes)
386. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 4 Jan 2001 06:03:47 -0500; Having a look at rise and fall times on the FT1000MP, I could send 150 WPM. I think it is poor engineering, not planning. Use an ALC system that starts at full voltage, and then pulls quickly DOWN to; /archives//html/Amps/2001-01/msg00123.html (9,996 bytes)
387. [AMPS] Output Pulse from ICOM 706 (correction) (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 4 Jan 2001 06:31:16 -0500; It is fast enough, your eyes aren't and it doesn't store the signal. It also may trigger too slow. 73, Tom W8JI w8ji@contesting.com -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amp; /archives//html/Amps/2001-01/msg00124.html (9,082 bytes)
388. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 4 Jan 2001 12:10:34 -0500; Well Peter, I sure notice it on FT-1000MP's. I had a loaner FT- 1000MP here, and it spiked on leading edge....although nothing like some rigs. My FT-1000D, ICOM 751A's, and an IC-781 do NOT spike. S; /archives//html/Amps/2001-01/msg00136.html (10,852 bytes)
389. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 4 Jan 2001 15:19:45 -0500; Hi Paul, No way. You only see a tiny bit of the actual spike. You can not see the peak power that way, even with many peak reading meters. It takes a fast meter with a long storage time or a storage; /archives//html/Amps/2001-01/msg00142.html (11,580 bytes)
390. [AMPS] Comments please (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 4 Jan 2001 19:12:58 -0500; I have an IC-751A I'll sell you for 100 bucks. It was connected to an amp using reed relays when the locked up tying the output and input of the amp while the radio was connected. If you use a reed; /archives//html/Amps/2001-01/msg00152.html (7,010 bytes)
391. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 5 Jan 2001 00:37:52 -0500; That's a lot less than I measure here Doug, using a peak storage power meter used for reading medical devices. With 13.8 volts I read an overshoot to 140 watts on my newer 706 MKII and 148 watts on; /archives//html/Amps/2001-01/msg00157.html (9,416 bytes)
392. [AMPS] re: Pwr Switch AL-811 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 5 Jan 2001 21:11:03 -0500; Sounds like the switch is ready to let go. They had a batch of bad switchs, but found a vendor who was better. 73, Tom W8JI w8ji@contesting.com -- FAQ on WWW: http://www.contesting.com/FAQ/amps Subm; /archives//html/Amps/2001-01/msg00184.html (8,499 bytes)
393. [AMPS] re: Pwr Switch AL-811 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Fri, 5 Jan 2001 21:41:07 -0500; They have a better switch now. From time to time, some parts just don't hold up well. Rocker switches are always a problem. My multiple outlet strip I use to turn my radios on (just a couple radios); /archives//html/Amps/2001-01/msg00186.html (8,458 bytes)
394. [AMPS] re: Pwr Switch AL-811 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sat, 6 Jan 2001 15:00:21 -0500; Hi Jim, Some are, some aren't. If you poll users of 811's, you'll find only one or two batches out of several thousand sold have this problem. Same with my outlet strip. I've used them for years, and; /archives//html/Amps/2001-01/msg00216.html (9,416 bytes)
395. [AMPS] Eimac - Care and Feeding of Power Grid Tubes (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Sun, 7 Jan 2001 09:06:38 -0500; Rich, make things up just to get even with someone? You can't be serious. He's always able to take technical correction and admit a mistake, and always offers sound technical arguments. Like the cho; /archives//html/Amps/2001-01/msg00236.html (9,962 bytes)
396. [AMPS] Advice about what linear to buy (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 8 Jan 2001 18:17:52 -0500; Hi Jim, TVI has absolutely nothing to do with "headroom" in the PA. It is entirely a function of the layout and shielding integrity. "Side splatter" (as opposed to "up and down splatter") is not nece; /archives//html/Amps/2001-01/msg00292.html (9,184 bytes)
397. [AMPS] Advice about what linear to buy (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 8 Jan 2001 20:46:31 -0500; OK, I stand corrected! All things equal, the higher power amplifier will have more TVI and more IMD. ........and you know that because? Factually, air variables can and do offer very low impedances t; /archives//html/Amps/2001-01/msg00296.html (9,442 bytes)
398. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 15 Jan 2001 08:12:34 -0500; You guys should see how difficult it is to correct an error in a review, and your tune would change! I can't speak for radios, but with other things the ARRL has a mind of it's own. Even if you clea; /archives//html/Amps/2001-01/msg00358.html (10,337 bytes)
399. [AMPS] Receiver tests in the past........ (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 15 Jan 2001 17:33:47 -0500; Maybe we are talking about different amounts of "good". What is the intercept at 2 kHz spacing (narrow), and 20 kHz spacing (wide)? How do they compare to tests at 100 kHz? As I recall, the FT1000MP; /archives//html/Amps/2001-01/msg00368.html (9,640 bytes)
400. [AMPS] receivers (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Mon, 15 Jan 2001 17:44:28 -0500; Here are some specs: But back to Tom's point. I went through a number of swept test data and was surprised to find that my generalization was not true in all cases. Here is the 5-kHz data for the rig; /archives//html/Amps/2001-01/msg00369.html (8,534 bytes)

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