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Total 16 documents matching your query.

1. [Amps] L4-B (score: 1): Author: Edwin Karl <edk0kl@centurytel.net>; Date: Sun, 30 Mar 2014 23:07:13 -0500; Just be very careful with the power resistors used in the bias cutoff/ bleeder They are mounted on long screws that run through the center of the resistor. In repairing an amplifier for a buddy, I ha; /archives//html/Amps/2014-03/msg00189.html (6,723 bytes)
2. Re: [Amps] L4-B (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Mon, 31 Mar 2014 16:18:41 -0700 (PDT); Also, Kapton(tm) aka polyimide tape will work FB. It works well at high temperature and high voltage. vy 73, Bryan WA7PRC -- Date: Sun, 30 Mar 2014 23:07:13 -0500 From: Edwin Karl To: amps@contesting; /archives//html/Amps/2014-03/msg00197.html (7,751 bytes)
3. Re: [Amps] L4-B (score: 1): Author: "Mark Bitterlich" <markbitterlich@embarqmail.com>; Date: Mon, 31 Mar 2014 19:26:05 -0400; Really? Interesting. Just FYI, Kapton insulated wire was removed from ALL military aircraft after some very impressive tests were done showing how it tended to blow and burn under certain conditions.; /archives//html/Amps/2014-03/msg00198.html (9,128 bytes)
4. Re: [Amps] L4-B (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Mon, 31 Mar 2014 16:33:25 -0700 (PDT); Yes, really. We used it for decades, in both tape form and Kapton-insulated wire form, in critical applications at the world's largest OEM of RF-driven sealed CO2 Lasers. The stuff is VERY tough. The; /archives//html/Amps/2014-03/msg00199.html (9,284 bytes)
5. Re: [Amps] L4-B (score: 1): Author: "Mark Bitterlich" <markbitterlich@embarqmail.com>; Date: Mon, 31 Mar 2014 20:45:19 -0400; I believe you Bryan. The biggest problem it had was wicking up hydrocarbons, which are not usually found in the ham shack, or a OEM RF-driven Sealed Laser facility. then through some magic of chemist; /archives//html/Amps/2014-03/msg00200.html (11,375 bytes)
6. Re: [Amps] L4-B (score: 1): Author: Michael Tope <W4EF@dellroy.com>; Date: Mon, 31 Mar 2014 18:01:59 -0700; It is used pretty extensively in the flight hardware that JPL builds for space. I know for a fact there was a bunch used on the landing radar for the Curiosity rover. I am sure there is a bunch of it; /archives//html/Amps/2014-03/msg00201.html (10,755 bytes)
7. Re: [Amps] L4-B (score: 1): Author: donroden@hiwaay.net; Date: Mon, 31 Mar 2014 20:09:34 -0500; Harris uses a sheet of it between the cavity and a large square piece of aluminum for a coupling capacitor @ 11KVDC + RF . Continental wraps it around a two piece stovepipe attached to the plate of a; /archives//html/Amps/2014-03/msg00202.html (11,319 bytes)
8. Re: [Amps] L4-B (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 31 Mar 2014 21:19:55 -0400; In another life, I recall changing out the Kapton blocker in a Harris FM-35K. It hadn't failed in 24/7 service at 12KV, but a service bulletin in the late'80s called for doubling-up on the sheets to; /archives//html/Amps/2014-03/msg00203.html (12,283 bytes)
9. Re: [Amps] L4-B (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Mon, 31 Mar 2014 21:38:38 -0400; They were used the both the plate blocker and screen bypass in the RCA F and G lines of VHF TV transmitters IIRC - but that was a lifetime ago. I certainly remember changing them when rebuilding PA c; /archives//html/Amps/2014-03/msg00204.html (12,886 bytes)
10. Re: [Amps] L4-B (score: 1): Author: donroden@hiwaay.net; Date: Mon, 31 Mar 2014 20:49:05 -0500; One failure mode was when the cavity spark-gap took a lightning hit and a ball of molten brass rolled up against the plate blocker and burned a hole in the Kapton. solved by making a 4 layer catch tr; /archives//html/Amps/2014-03/msg00206.html (13,055 bytes)
11. [Amps] L4-B (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Mon, 31 Mar 2014 20:40:53 -0700; vy 73, Bryan WA7PRC -- xfmrs by power companies, etc..and a lot of those have xfmr oil in em...running at high temps. They dont blow up....so the military applications etc....and on aircraft must be; /archives//html/Amps/2014-03/msg00209.html (7,118 bytes)
12. Re: [Amps] L4-B (score: 1): Author: "mgb " <markbitterlich@embarqmail.com>; Date: Tue, 1 Apr 2014 13:16:10 -0400 (EDT); It seems that my posting regarding certain cautions that should be considered when using polyimide wiring made by Kapton (TM) has not met with much approval from the resident experts, in fact quite t; /archives//html/Amps/2014-04/msg00005.html (9,159 bytes)
13. Re: [Amps] L4-B (score: 1): Author: Al Kozakiewicz <akozak@hourglass.com>; Date: Tue, 1 Apr 2014 13:53:18 -0400; It was the cause of the MD-11 Swissair flight 111 crash off Nova Scotia that killed 229 people and has been noted in a number of other commercial airiner fires that did not end up in the loss of the; /archives//html/Amps/2014-04/msg00006.html (9,279 bytes)
14. Re: [Amps] L4-B (score: 1): Author: donroden@hiwaay.net; Date: Tue, 01 Apr 2014 13:38:52 -0500; It seems that my posting regarding certain cautions that should be considered when using polyimide wiring made by Kapton (TM) has not met with much approval from the resident experts, in fact quite t; /archives//html/Amps/2014-04/msg00007.html (7,089 bytes)
15. Re: [Amps] L4-B (score: 1): Author: "mgb " <markbitterlich@embarqmail.com>; Date: Tue, 1 Apr 2014 13:10:36 -0400 (EDT); It seems that my posting regarding certain cautions that should be considered when using polyimide wiring made by Kapton (TM) has not met with much approval from the resident experts, in fact quite t; /archives//html/Amps/2014-04/msg00041.html (9,466 bytes)
16. Re: [Amps] L4-B (score: 1): Author: Bryan Swadener <bswadener@yahoo.com>; Date: Tue, 1 Apr 2014 18:26:57 -0700 (PDT); Mark: I was done with my first posting. You haven't changed and won't change my opinion. Kapton/polyimide is FB in this application. YMMV -30- Fini Done End vy 73, Bryan WA7PRC Subject: Re: [Amps] L4; /archives//html/Amps/2014-04/msg00043.html (7,366 bytes)

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