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Total 421 documents matching your query.

321. Re: [Amps] Trichloroethene (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Thu, 16 Mar 2006 13:44:16 -0500
M.E.K., or Methyl Ethyl Ketone is a flammable distillate of petroleum. It is slightly less evaporative than Acetone in free air. It is used as a solvent thinner for some specific paint compounds and
/archives//html/Amps/2006-03/msg00476.html (10,350 bytes)

322. Re: [Amps] DRAKE L7 Plate meter update 2 and now PS (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Fri, 17 Mar 2006 06:47:06 -0500
Dear Marc, They might be bleeder resistors. With just the HV supply running and the tubes not conducting, the bleeders are across the HV output. I run 100K ohms at 200 watt resistance on a 3.5 ~ 4.25
/archives//html/Amps/2006-03/msg00485.html (7,966 bytes)

323. Re: [Amps] HV switching power supplys? (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Fri, 17 Mar 2006 06:49:36 -0500
Kevin, Are you against using a transformer, rectifier and filter? Is weight a problem? Hal W4HBM _______________________________________________ Amps mailing list Amps@contesting.com http://lists.con
/archives//html/Amps/2006-03/msg00486.html (7,232 bytes)

324. Re: [Amps] Surfactants (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Fri, 17 Mar 2006 12:30:59 -0500
Boy am I glad you brought this up! The stuff that is accepted most everywhere as being the least toxic and best for machinery and electronics is SIMPLE GREEN. SIMPLE GREEN comes in spray bottles and
/archives//html/Amps/2006-03/msg00500.html (7,825 bytes)

325. Re: [Amps] Trichloroethene (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Fri, 17 Mar 2006 14:59:39 -0500
Uh, oh: Diesel...... Now we're getting to those Navy boys....... I used to make fun of my diesel boat buddies when we got together, telling them they were hooked on the smell of diesel fuel and socks
/archives//html/Amps/2006-03/msg00522.html (8,028 bytes)

326. [Amps] Unusual Solvent (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Fri, 17 Mar 2006 15:18:36 -0500
Thinking about cleaning gunk off of electrical apparatus brings me back to when I was working in old mechanical telephone central office power plants. Some parts came wrapped in paper with heavy grea
/archives//html/Amps/2006-03/msg00523.html (7,004 bytes)

327. [Amps] OT Question for Will (score: 1)
Author: harold b mandel <ka1xo@juno.com>
Date: Wed, 29 Mar 2006 07:17:01 -0500
Dear Will, Is it not true that you are a Disabled American Veteran? Respectfully, Hal Mandel W4HBM _______________________________________________ Amps mailing list Amps@contesting.com http://lists.c
/archives//html/Amps/2006-03/msg00730.html (6,392 bytes)

328. Re: [Amps] Replacement Cap Mounting Board Henry 2k-Classic Console (score: 1)
Author: "Harold Mandel" <ka1xo@juno.com>
Date: Mon, 3 Apr 2006 13:53:20 -0400
Gentlemen, The material is called Glastic GPO-3. PWD uses sheets of it on their bigger transformers for the HV connections. Hal Rich, What you have there is good for this. Now, you can get that pink
/archives//html/Amps/2006-04/msg00024.html (11,352 bytes)

329. [Amps] AM Downward Modulation (score: 1)
Author: harold b mandel <ka1xo@juno.com>
Date: Thu, 13 Apr 2006 15:36:58 -0400
In my screen-modulated days when the tetrodes in the exciter were not neutralized, and not tuned correctly, and when the screen supply was unstable my exciter would exhibit downward modulation, where
/archives//html/Amps/2006-04/msg00231.html (7,042 bytes)

330. [Amps] Strange Power Supply (score: 1)
Author: harold b mandel <ka1xo@juno.com>
Date: Thu, 20 Apr 2006 12:53:22 -0400
Working with telephone company power supplies for about 44 years has shown me that Will Matney's, (et al), comments are dead on. For me, power supplies were in two usual flavors: High Voltage/Low Cur
/archives//html/Amps/2006-04/msg00315.html (9,186 bytes)

331. [Amps] 3CPX800A7 Bias (score: 1)
Author: harold b mandel <ka1xo@juno.com>
Date: Mon, 24 Apr 2006 13:02:29 -0400
In restoring and upgrading an Alpha 76A to use a pair of 3CPX800A7 triodes there was a choice to be made over continuing to use the OEM bias source, which is based on a fixed zener, and meant for the
/archives//html/Amps/2006-04/msg00366.html (7,185 bytes)

332. Re: [Amps] How intermod limits your PEP (score: 1)
Author: "Harold Mandel" <ka1xo@juno.com>
Date: Tue, 16 May 2006 12:57:08 -0400
What a fine presentation! Thanks for your easy-to-understand explanation of distortion-related inefficiency. I read of these "CB Shoot-Outs" where mobile operators run 15KW for 30 seconds or so, from
/archives//html/Amps/2006-05/msg00114.html (12,342 bytes)

333. Re: [Amps] Henry 8K (score: 1)
Author: "Harold Mandel" <ka1xo@juno.com>
Date: Tue, 16 May 2006 16:11:31 -0400
However, the reliable-amplifier mindset would much rather have a machine capable of 6500 watts, including the beefiness of all the components inside at that rating, loafing along at legal versus push
/archives//html/Amps/2006-05/msg00132.html (9,893 bytes)

334. Re: [Amps] Henry 8K (score: 1)
Author: "Harold Mandel" <ka1xo@juno.com>
Date: Tue, 16 May 2006 16:32:44 -0400
Dear Keith, It's all in our definition here of the word "loafing." ( One YL that is intimately acquainted with this station's operator has a seemingly unending answer to this...) When you say "loafin
/archives//html/Amps/2006-05/msg00135.html (11,369 bytes)

335. Re: [Amps] Henry 8K (score: 1)
Author: "Harold Mandel" <ka1xo@juno.com>
Date: Wed, 17 May 2006 10:34:47 -0400
Jail Time? Fines? We've got ham "broadcasters" with HiFi audio and 6KHz+ signals on 75 meters running two 4-1000A's modulated by two 4-1000A's in AM with audio chains modifying the emphasis and they
/archives//html/Amps/2006-05/msg00185.html (10,400 bytes)

336. Re: [Amps] Henry 8K (score: 1)
Author: "Harold Mandel" <ka1xo@juno.com>
Date: Wed, 17 May 2006 12:17:56 -0400
Dear Mr. Bill Gates, Our Amplifier Reflector net is having a debate where antenna arrays are pitched against signal power as generated by Power Amplifiers. Additional to this are the factions that sa
/archives//html/Amps/2006-05/msg00191.html (11,129 bytes)

337. Re: [Amps] Henry 8K (score: 1)
Author: "Harold Mandel" <ka1xo@juno.com>
Date: Wed, 17 May 2006 11:05:42 -0400
Where are those ubiquitous OO's when we really need them? Rich, care to comment (ahem)? Does anyone even remember those people? They would have been right at home in the Soviet Union in the 1930's. T
/archives//html/Amps/2006-05/msg00196.html (10,502 bytes)

338. Re: [Amps] Henry 8K (score: 1)
Author: "Harold Mandel" <ka1xo@juno.com>
Date: Thu, 18 May 2006 10:34:35 -0400
Dear Mike, It's not that I have a problem. It's the fact that people can run whatever kind of station they please to run, and there's no restrictions. Who's going to stop me if I decide to run a vint
/archives//html/Amps/2006-05/msg00226.html (8,305 bytes)

339. Re: [Amps] who needs it? Henry 8K (score: 1)
Author: "Harold Mandel" <ka1xo@juno.com>
Date: Fri, 19 May 2006 06:36:08 -0400
Dear Fern, It started out just like the Cold War: He and she began building bigger bombs. O.K., let's all throw our amplifiers in the dumpster and go back to 100 watts output. So the guy living in an
/archives//html/Amps/2006-05/msg00235.html (9,413 bytes)

340. Re: [Amps] RE : who needs it? Henry 8K (score: 1)
Author: "Harold Mandel" <ka1xo@juno.com>
Date: Wed, 24 May 2006 11:33:35 -0400
Driving and Contesting? You are all invited to live and work in metropolitan New Jersey/New York. That is, reside in New Jersey and commute to Manhattan and back every day. Sleep as late as you can a
/archives//html/Amps/2006-05/msg00325.html (13,299 bytes)

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