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Total 421 documents matching your query.

301. Re: [Amps] International Radio Service Division (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Wed, 1 Mar 2006 15:48:32 -0500
If you choose to review all the comments on QTH.COM, following the different threads, [ IRSD ] and [ Intl Radio Service Division ] you will see that there are matters listed since 2003. The fact is t
/archives//html/Amps/2006-03/msg00010.html (8,112 bytes)

302. Re: [Amps] Panel lettering, scales, dials, etc (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 2 Mar 2006 08:36:17 -0500
<< http://www.plastic-tags.com >> Ask for Elizabeth Perry. Tell her it's for a ham radio panel project and she'll be able to refer to a wide library of tag styles just for HB panels. These people hav
/archives//html/Amps/2006-03/msg00020.html (14,331 bytes)

303. Re: [Amps] Alpha 78 voltage sag (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 2 Mar 2006 10:37:46 -0500
Dear Martin, My current project is a renovation of an Alpha 76a. The original transformer, made for two 8874 triodes, would not support a set of two 3CPX800A7 triodes, both in the filament and in the
/archives//html/Amps/2006-03/msg00023.html (8,489 bytes)

304. Re: [Amps] What's a better rheostat placement ? (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Sun, 5 Mar 2006 11:16:31 -0500
Dear Ron, I recently put together an outboard supply and needed to have a wide range of filament control, especially with dual primaries for 117/234 vac in the filament xfmr. The solution was to inst
/archives//html/Amps/2006-03/msg00089.html (7,140 bytes)

305. Re: [Amps] cleaning contacts and pots? (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Mon, 6 Mar 2006 11:39:34 -0500
The use of silver polishing paste judiciously through a rebuild is a good start-off practice that allows the builder to closely inspect all the various componentry while cleaning. A tooth brush fille
/archives//html/Amps/2006-03/msg00120.html (7,149 bytes)

306. [Amps] bird watts (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Tue, 7 Mar 2006 06:36:43 -0500
A previous post called attention to an amplifier being sold that had a reference to "bird watts." Yesterday this term arose in another conversation and I asked the broadcast engineer I was speaking w
/archives//html/Amps/2006-03/msg00163.html (8,853 bytes)

307. Re: [Amps] ripple in HV ps (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Wed, 8 Mar 2006 09:46:22 -0500
The 2006 ARRL Handbook recommends no greater than 3% ripple in anode supplies. Hal W4HBM _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.
/archives//html/Amps/2006-03/msg00197.html (6,215 bytes)

308. Re: [Amps] Proof of idiocy (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Mon, 13 Mar 2006 07:43:20 -0500
It is possible that the threads are bunged on the leadscrew or the collar, but good luck locating a tap or die! These threads are Jennings proprietary pitch and once fouled there is no way to chase t
/archives//html/Amps/2006-03/msg00322.html (7,956 bytes)

309. Re: [Amps] Proof of idiocy (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Mon, 13 Mar 2006 17:18:18 -0500
Yes. Just from knowing how difficult it was to repair a Jennings vacuum variable thread defect and knowing the parts were proprietary from Jennings I never bothered to try and guage the pitch. That's
/archives//html/Amps/2006-03/msg00344.html (8,096 bytes)

310. Re: [Amps] Proof of idiocy (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Tue, 14 Mar 2006 07:13:42 -0500
Dear Will, case-hardened. This puts a dent in the one - to five thou cut, huh? Hal On Mon, 13 Mar 2006 19:24:30 -0500 "Will Matney" <craxd1@verizon.net> writes: ______________________________________
/archives//html/Amps/2006-03/msg00359.html (9,884 bytes)

311. Re: [Amps] Threads - was idiocy - perhaps it still is (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Tue, 14 Mar 2006 07:36:13 -0500
Has anyone ever heard of the new Royal Enfield motorcycle, currently manufactured in Bombay? These gems have a collection of threads that require five completely different sets of wrenches. Yes, they
/archives//html/Amps/2006-03/msg00360.html (8,340 bytes)

312. Re: [Amps] Scope book (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Tue, 14 Mar 2006 07:22:14 -0500
Is the book you mention a soft-cover edition with a grey paper cover and blue printing on the outside? I seem to remember seeing this book in my library, but it and the library are 300 miles away at
/archives//html/Amps/2006-03/msg00361.html (8,471 bytes)

313. Re: [Amps] Proof of idiocy (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Tue, 14 Mar 2006 07:25:33 -0500
Many Jennings vacuum variables have this neat little set screw in the top cap that stops the thread somewhere near the end of it's travel. Alpha used this to prevent tuning up on 10 meters in the 77d
/archives//html/Amps/2006-03/msg00362.html (9,516 bytes)

314. [Amps] neat pieces (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Tue, 14 Mar 2006 09:46:43 -0500
Dave Wilson, one of the original movers and shakers in the ETO Alpha 77Dx project, and owner of Frontier Engineering has a couple of very interesting E-Bay items: 587 919 7745 587 923 9875 The 77Sx t
/archives//html/Amps/2006-03/msg00366.html (6,225 bytes)

315. [Amps] Boat-Anchor Cleanliness (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Wed, 15 Mar 2006 13:54:05 -0500
1. Old xfmrs that are not completely potted will be destroyed in the dishwasher. 2. Even PWD's will be destroyed because there is always one little pinhole in the tar. 3. All meters will be destroyed
/archives//html/Amps/2006-03/msg00397.html (6,937 bytes)

316. Re: [Amps] Boat-Anchor Cleanliness (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Wed, 15 Mar 2006 15:41:32 -0500
Dear Chris, Actually, I have washed dusty, cruddy circuit boards in the sink many times. I always finish with an isopropanol scrub and a hot blow-dry. The alcohol mixes with the water and evaporates
/archives//html/Amps/2006-03/msg00398.html (10,971 bytes)

317. Re: [Amps] Trichloroethene (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 16 Mar 2006 07:53:29 -0500
Gentlemen, This is a WARNING about Chlorinated Solvents. IBM issued its "IBM Cleaning Solution" in the 'Fifties and 'Sixties that found widespred use. It was the compound called "Methyl Chloroform" o
/archives//html/Amps/2006-03/msg00437.html (9,646 bytes)

318. Re: [Amps] CHASSIS (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 16 Mar 2006 09:51:09 -0500
Colin, I have maintained some lovely Rolls-Royces, Bentleys and Jaguars through the years with wooden dashboards. One client of mine had a 1934 Rolls ambulance with a 12-cylinder plant that was compl
/archives//html/Amps/2006-03/msg00439.html (7,731 bytes)

319. Re: [Amps] Happy birthday to... (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 16 Mar 2006 10:58:06 -0500
Dear Sir, In honor of George, today, and of yesterday's worldwide celebration of the discovery of pi, I offer the following: " Three point one four, one five nine. George Ohm made it mighty fine." On
/archives//html/Amps/2006-03/msg00451.html (8,004 bytes)

320. Re: [Amps] Happy birthday to... (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 16 Mar 2006 11:01:11 -0500
Hi Joe, Would then the A.T. & T. network be called the "intranet" or the "Intranet?" Hal W4HBM On Thu, 16 Mar 2006 10:44:31 -0500 "Joe DiPietro, N2UF" <n2uf@joeham.net> writes: ______________________
/archives//html/Amps/2006-03/msg00452.html (8,128 bytes)

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