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261. Re: [Amps] AC wiring (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Wed, 19 Oct 2005 10:36:37 -0400
The telephone world specifies 185% overhead for electric wiring. It also specifies 0.25 VDC drop in a conductor under full load, but that's for DC Battery circuits. The size of the circuit breaker sh
/archives//html/Amps/2005-10/msg00461.html (11,891 bytes)

262. Re: [Amps] AC wiring (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 20 Oct 2005 11:25:34 -0400
Once again the wisdom of 150 years of Telephone Craft can be used as a good source of knowledge: Grounding conductors are subject during lightning strikes to a pulse of voltage that travels along the
/archives//html/Amps/2005-10/msg00505.html (11,458 bytes)

263. Re: [Amps] procedure (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Wed, 26 Oct 2005 08:23:24 -0400
You just did.......... Ask away! Harold Mandel Const. Supt. Baran/Greenville 606 - 205 - 0172 hmandel@barantelecom.com _______________________________________________ Amps mailing list Amps@contestin
/archives//html/Amps/2005-10/msg00591.html (6,961 bytes)

264. Re: [Amps] FW: High Voltage cable - fitting into SHV type plugs (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Wed, 26 Oct 2005 11:07:02 -0400
Dear Larry, You need to be careful about using auto type spark plug wires for HV cables. Some are made with graphite cores. These are resistive types and they are not meant to carry any significant c
/archives//html/Amps/2005-10/msg00598.html (8,239 bytes)

265. Re: [Amps] Mobile high power (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 27 Oct 2005 13:20:47 -0400
If anyone is interested I can supply the name of a supplier of really heavy duty alternators, single or triple phase, as direct replacements for OEM products. One application I saw used seven units a
/archives//html/Amps/2005-10/msg00631.html (8,775 bytes)

266. Re: [Amps] Mobile high power (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 27 Oct 2005 13:30:10 -0400
Years ago police cars had 200 watt transmitters on 29MHz. The shops would outfit the vehicles with Delco-Remy 100 amp generators that barely fit under the hood. They needed special regulators, but at
/archives//html/Amps/2005-10/msg00633.html (12,799 bytes)

267. Re: [Amps] Mobile high power (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Fri, 28 Oct 2005 11:18:06 -0400
The trouble in applying extra battery loads to hybrid vehicles might be that the main battery is matched to the car drive mechanism such that maximum economy and speed/weight ratios would not permit
/archives//html/Amps/2005-10/msg00650.html (8,894 bytes)

268. Re: [Amps] Mobile high power (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Fri, 28 Oct 2005 13:28:26 -0400
Dear Rich, That question can't be answered here, now. Not knowing the dynamics of hybrids I can't come up with what kind of amperage would be deleterious. I know there's some overhead for additional
/archives//html/Amps/2005-10/msg00654.html (9,252 bytes)

269. Re: [Amps] Mobile high power (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Mon, 31 Oct 2005 10:57:52 -0500
Hello, "250 A-max." Does that mean 250 cold cranking amperes, or 250 Ampere-Hours? In either case, that's not one heckuva lot. Hal W4HBM On Mon, 31 Oct 2005 15:50:58 +0000 Philip de Cadenet <phil@tra
/archives//html/Amps/2005-10/msg00720.html (8,949 bytes)

270. Re: [Amps] [BULK] - Drake L-4B PSU burned resistor (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Tue, 1 Nov 2005 10:54:17 -0500
Gents, HV safety resistors absorb glitches of the amplifier tubes, such as internal arcs. In such a situation the resistor may be absorbing the entire stored energy of the power supply filter and att
/archives//html/Amps/2005-11/msg00008.html (8,313 bytes)

271. [Amps] Metal-Clad Resistors (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Wed, 2 Nov 2005 10:08:04 -0500
Gentlemen, A previous posting mentioned Vishay (or equiv.) metal-clad, bolt-down resistors as maybe candidates for anode protection, and a further comment from AG6K warned against using these, and to
/archives//html/Amps/2005-11/msg00030.html (7,353 bytes)

272. [Amps] -48 Volt Switching Power Supplies (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Mon, 21 Nov 2005 12:03:19 -0500
Dear Friends, Before running off and making a cash offer on a surplus -48 Volt switcher supply from a telecom location please consider that it may or may not be working. It takes an Act of Congress t
/archives//html/Amps/2005-11/msg00402.html (7,375 bytes)

273. Re: [Amps] sb-200 HIGH swr on output- HELP! (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Mon, 21 Nov 2005 22:28:00 -0500
It sounds like your T/R relay contacts are dirty. That's the first place I'd check. If it's an open frame relay it's probably the culprit. For testing purposes always use a dummy load. Keep the other
/archives//html/Amps/2005-11/msg00421.html (8,074 bytes)

274. [Amps] 3CPX800A7 Not Available (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Tue, 29 Nov 2005 07:20:43 -0500
Gents, Was about to embark on another hotel room-machine shop project here in Greenville, modifying an old Alpha 76a with an outboard supply and two 3CPX800A7 triodes only to find out from the source
/archives//html/Amps/2005-11/msg00515.html (6,689 bytes)

275. Re: [Amps] 3CPX800A7 Not Available (HAROLD B MANDEL) (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Tue, 29 Nov 2005 15:11:11 -0500
Dear Tom, The 3CPX800A7 has more ceramic material that separates the interior elements, allowing it to run at an elevated plate voltage. The 3CX800A7 is rated at 2200 volts on the plate while the 3CP
/archives//html/Amps/2005-11/msg00518.html (7,233 bytes)

276. Re: [Amps] 4K Ultra Restoration (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Sun, 4 Dec 2005 12:20:39 -0500
Bob, Go for the D7 tube right away. You're going to have to completely strip the chassis anyway, right? I'm working on an old Alpha 76a for my hotel room station. The first thing was to strip everyth
/archives//html/Amps/2005-12/msg00020.html (10,744 bytes)

277. Re: [Amps] Emailing: hf_millinium (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Mon, 12 Dec 2005 12:10:00 -0500
Agreeing wholeheartedly with everyone, I see many here who revel in amplifiers with analogue meters that display a dip or peak as a motion-trend, and tuning is a function of watching this movement. B
/archives//html/Amps/2005-12/msg00139.html (9,570 bytes)

278. Re: [Amps] Want to use a knob with a 3/8" opening on a 1/4" shaft. (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Fri, 23 Dec 2005 03:24:43 -0500
OCEAN STATE ELECTRONICS HTTP://WWW.OSELECTRONICS.COM 1 - 800 - 866 - 6626 PAGE 99 - 101 IN THEIR CATALOG '73, Hal W4HBM On Thu, 22 Dec 2005 23:57:02 -0800 "Jack M. Henkle" <w7jk@verizon.net> writes:
/archives//html/Amps/2005-12/msg00302.html (7,863 bytes)

279. Re: [Amps] Want to use a knob with a 3/8" opening on a 1/4" shaft. (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Fri, 23 Dec 2005 11:50:44 -0500
Usually, the lathe's tailstock has a collet and matching chuck. That's where the drill bit goes. The work piece gets clamped in the jaws of the headstock and it turns the work while the drill remains
/archives//html/Amps/2005-12/msg00307.html (9,022 bytes)

280. Re: [Amps] Calibrate a panel meter? (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 29 Dec 2005 09:40:40 -0500
Bill, You can send it off to any one of dozens of meter repair and calibration places like Simpson in New Jersey. If you like your panel meter, repair and calibrate it. We do these all the time in ce
/archives//html/Amps/2005-12/msg00377.html (9,592 bytes)

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