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381. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Mon, 28 Aug 2006 17:50:48 -0400; What's a PC suppressor? Hal Mandel --Original Message-- [snip] I have only had one 3-500Z amplifier take off on me when I was purposely testing PC suppressors back in the early 1970's. I was attempti; /archives//html/Amps/2006-08/msg00744.html (7,600 bytes)
382. Re: [Amps] pwr supplies (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Sat, 2 Sep 2006 09:57:27 -0400; Dear Carl, I used a Tripp-Lite 20 for the 12 volt supply in my hotel portable shack until upgrading to an Astron RM-70A. The Astron was chosen because it was decided to retire the switching supply on; /archives//html/Amps/2006-09/msg00033.html (8,194 bytes)
383. [Amps] Astrons catching on Fire (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Sat, 2 Sep 2006 10:58:53 -0400; Astrons catching Fire!? Dear Mike and the Group, What information can you offer on Astron power supplies catching on fire? Is there a suggested remedy to forestall or prevent such catastrophe? This i; /archives//html/Amps/2006-09/msg00036.html (7,829 bytes)
384. Re: [Amps] [1000mp] 1000MP Power Supplies (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Fri, 8 Sep 2006 15:36:25 -0400; Here's another great find for you-all with Astron linear supplies that are worried about poor regulation and capacitor breakdown: JEA CAPACITORS, a store on e-bay.com, run by Jacques Ebert, (Capacito; /archives//html/Amps/2006-09/msg00143.html (7,016 bytes)
385. Re: [Amps] Step Start on a 3KA Amp (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Tue, 19 Sep 2006 16:05:21 -0400; There are all sorts of delay relays available in the commercial electrical market. All elevators use these plug-in devices. The modern ones run on a.c. or D.C, and from 24 to 240 volts, all on the sa; /archives//html/Amps/2006-09/msg00226.html (10,508 bytes)
386. [Amps] Gerritsen (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Tue, 19 Sep 2006 17:37:56 -0400; Gerritsen was tried and convicted for espousing the simultaneous effectiveness and ineffectiveness of parasitic suppressors on a local reflector net and through several local police, EMT and military; /archives//html/Amps/2006-09/msg00229.html (7,014 bytes)
387. [Amps] shipping damage (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Fri, 29 Sep 2006 09:22:54 -0400; This is as old a topic here as was parasitic suppressors. If someone ships something that is not packed well enough to survive a fall out of a window three floors up they deserve to have their stuff; /archives//html/Amps/2006-09/msg00356.html (8,474 bytes)
388. Re: [Amps] [1000mp] Shipper and claims (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Mon, 2 Oct 2006 10:20:03 -0400; Alpha now has a caveat about shipping on their website: "Due to excessive shipping damage caused by standard shipping methods (cardboard box with padding) Alpha Radio Products highly recommends that; /archives//html/Amps/2006-10/msg00005.html (13,677 bytes)
389. Re: [Amps] Glued meters ! (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Thu, 5 Oct 2006 17:27:07 -0400; Alpha Radio has used high-temperature (red) silicon-based adhesives for several applications for many years. The most common application is to adhere the high-temperature (red) silicon-rubber chimney; /archives//html/Amps/2006-10/msg00044.html (7,993 bytes)
390. Re: [Amps] "10 Meter Ban" to be lifted ... (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Thu, 12 Oct 2006 11:27:54 -0400; Paul, Years ago the Alpha 77Dx was manufactured with one 8877 tube and a square plate that could be removed to add a second 8877, making a 77Sx. People over America offered the "second tube kit" comp; /archives//html/Amps/2006-10/msg00087.html (8,912 bytes)
391. Re: [Amps] "10 Meter Ban" to be lifted ... (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Thu, 12 Oct 2006 16:59:26 -0400; Oh sure, an 8877 with 4KV on the plate will do the full boat, but a factory edition 77Dx will not achieve 4KV even with the key up, much less down. Even abusing the box in SSB and running CW won't ge; /archives//html/Amps/2006-10/msg00101.html (9,155 bytes)
392. Re: [Amps] New FCC Amplifier Rule (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Thu, 12 Oct 2006 11:14:23 -0400; Is this what the Politically Correct name for bootleggers has become? "Freebanders?" Forgetaboutit! They are criminals breaking Federal and International Laws. I had to study my butt off to pass four; /archives//html/Amps/2006-10/msg00102.html (8,316 bytes)
393. Re: [Amps] Peak Power (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Mon, 16 Oct 2006 07:33:04 -0400; Dear Ed, You are entirely correct about 200% modulation in AM commercial rigs. This was in the day when modulation reactors were driven by a push-pull set of hefty tubes. With the right iron you coul; /archives//html/Amps/2006-10/msg00164.html (8,093 bytes)
394. Re: [Amps] Peak Power (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Mon, 16 Oct 2006 10:37:25 -0400; What does it matter how much power is capable of being generated by an amateur station when the operator monitors the power output so as not to exceed the limitations of his license class and the lim; /archives//html/Amps/2006-10/msg00174.html (10,086 bytes)
395. Re: [Amps] Testing amp with no air flow (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Thu, 19 Oct 2006 09:23:25 -0400; Dear Rick, When tweaking my dual 3CPX1500A7 amp under the RF deck what I did was to fabricate a piece of 1/8" thick Plexiglas clear plastic in the same fashion as the lower plenum cover with the addi; /archives//html/Amps/2006-10/msg00197.html (8,314 bytes)
396. Re: [Amps] Testing amp with no air flow (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Thu, 19 Oct 2006 11:07:10 -0400; It's a question of economics and habit. If you feel confident in powering up ceramic devices without any airflow you are the one who footed the bill. The whole idea of the airflow scenario is that is; /archives//html/Amps/2006-10/msg00200.html (8,404 bytes)
397. Re: [Amps] 3-500 sockets (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Mon, 11 Dec 2006 12:26:22 -0500; Dear Dan, The Dremel line of accessories includes a tiny diamond tipped burr tool that will be excellent for removing material in riveted tube socket assemblies. The operator needs to use extreme cau; /archives//html/Amps/2006-12/msg00066.html (7,516 bytes)
398. Re: [Amps] QST (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Mon, 18 Dec 2006 12:30:34 -0500; [snip] I am becoming more and more disgusted with the lack of technical knowledge QST authors. [snip] Dear Bill, (et al), QST authors are politically correct. They do not insult or cause consternatio; /archives//html/Amps/2006-12/msg00140.html (8,631 bytes)
399. Re: [Amps] QST (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Mon, 18 Dec 2006 13:42:31 -0500; [snip] So Hal, what you're saying is that any ham with half a brain should not look Dear Bob, Let me quote QST: "" What Are We Looking For? "" "" An article that has the best chance of being accepted; /archives//html/Amps/2006-12/msg00144.html (8,836 bytes)
400. Re: [Amps] Alpha 87a (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Tue, 2 Jan 2007 08:23:54 -0500; If you gentlemen recall, there was a thread some time ago on amplifier input cable length as regarding tuning of input circuitry, etc. Someone had his Alpha auto-tuning amp go into alarm because of s; /archives//html/Amps/2007-01/msg00020.html (8,669 bytes)

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