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41. [AMPS] YC156 Photos (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Thu, 24 Jun 1999 03:36:18 +0100; Dave and all, I happen to have the capability to scan and post photos on the experimental server I have access to. If there is anyone out there who would like to share images of his amp, I would be h; /archives//html/Amps/1999-06/msg00623.html (8,770 bytes)
42. [AMPS] TV Doorknobs as Plate Blockers (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Thu, 24 Jun 1999 03:47:13 +0100; Dave, they have a bad rep, perhaps justifibly, because the RF current capacity is very low. They were only ment to be filter caps on the CRT anode supply. No consideration was given to RF specs when; /archives//html/Amps/1999-06/msg00625.html (8,209 bytes)
43. [AMPS] YC156 Photos (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Thu, 24 Jun 1999 04:05:21 +0100; Absolutely, but thats not to say they won't handle it under the proper circumstances. called " RF caps ", at least not so you could find. Interesting points you make here Phil, and I mostly agree, bu; /archives//html/Amps/1999-06/msg00626.html (9,563 bytes)
44. [AMPS] various (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Sat, 26 Jun 1999 00:41:47 +0100; Theoretically, John, I agree with you, but practically speaking, not so. Every HF amp I have built in the last 30+ years has had TV doorknobs as the anode DC block. Not a single failure in dozens of; /archives//html/Amps/1999-06/msg00717.html (11,415 bytes)
45. No subject (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Sat, 26 Jun 1999 04:44:52 +0100; Bill, N2BC, now has some pix at http://207.108.137.61 Enjoy. -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com; /archives//html/Amps/1999-06/msg00719.html (6,802 bytes)
46. [AMPS] Amp Photos (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Sat, 26 Jun 1999 13:30:38 +0100; <html><div>N2BC has supplied the missing image for his amp photo spread.</div> <br> <div>So far we have N2BC and W6RU besides myself on the list. Anybody else ready for an ego trip?</div> <br> <div>S; /archives//html/Amps/1999-06/msg00721.html (7,947 bytes)
47. [AMPS] Amp Photos (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Tue, 29 Jun 1999 01:47:57 +0100; Some mention was made about putting links to other pages on the web page I put up for amp photos. Some may have noticed that there was no real identification of any kind on the page or links even to; /archives//html/Amps/1999-06/msg00757.html (7,672 bytes)
48. [AMPS] Ig (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Tue, 02 Mar 1999 22:38:40 +0000; I always meter the grids independently on multi-tube amps, that is if I bother to meter them at all. Exact circuit varies with each amps topology. By the way, one of the tubes must be really mismatch; /archives//html/Amps/1999-03/msg00029.html (7,178 bytes)
49. [AMPS] CW amplifier progress (well, daydream progress) --long (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Wed, 17 Mar 1999 23:30:24 +0000; Well Peter, normally I agree with your opinions, but this time I have to disagree. I suppose if you live in a place where it's normally so cold you have to drink your beer warm, you might like having; /archives//html/Amps/1999-03/msg00390.html (11,946 bytes)
50. [AMPS] Instant ON.. (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Thu, 18 Mar 1999 23:15:14 +0000; Well John, The nice thing about hombrewing amps is that there is no reason to stop at only one. In my case, I found the "tuning problem" to be undesirable, so I keep an amp tuned for each of the most; /archives//html/Amps/1999-03/msg00450.html (10,003 bytes)
51. [AMPS] Fuses (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Tue, 23 Mar 1999 02:05:46 +0000; Peter, I have been using 40 ga. (or thereabouts) wire as a HV fuse on my tetrode amps for many years. In every case when the fuse was installed, there was no damage when the bang occurred. Replace th; /archives//html/Amps/1999-03/msg00569.html (8,387 bytes)
52. [AMPS] Fuses (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Wed, 24 Mar 1999 01:45:59 +0000; Dick, Thanks for that input. It seems your data parallels my more limited experiences. One has to wonder what the differences really are. A '30's vintage 813 surely does not have the metallurgy or pr; /archives//html/Amps/1999-03/msg00589.html (8,506 bytes)
53. [AMPS] HV Switching Supply (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Tue, 02 Feb 1999 00:40:34 +0000; Go for it, Carl! Since switcher technology has progressed to the point where one could actually work with SSB and CW type loads, I'm ready for either version you are proposing! One suggestion: Built-; /archives//html/Amps/1999-02/msg00043.html (8,112 bytes)
54. [AMPS] Cathode Impedance (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Thu, 04 Feb 1999 00:33:29 +0000; The need to add my $0.02 to this thread has become overwhelming. So here is something that at least a few of you might appreciate. I copied this chart out of a book some 25 or 30 years ago. I don't r; /archives//html/Amps/1999-02/msg00121.html (9,793 bytes)
55. [AMPS] Amplifier for CW (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Sun, 14 Feb 1999 02:18:17 +0000; class-B. Vic, Your idea is valid and one that I have used myself several times. Most notable was the pair of 4CX250's that ran 1400 watts out for 2 meter EME work. Some observations based on my exper; /archives//html/Amps/1999-02/msg00369.html (9,753 bytes)
56. [AMPS] Revitalising 'tired' tetrodes (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Sun, 18 Oct 1998 17:05:12 +0100; Chris, I've heard from someone who serviced milatary 4CX1000A amps that extended operation of the heater without any other potentials applied will lead to low emmision. I have heard this in other for; /archives//html/Amps/1998-10/msg00259.html (8,019 bytes)
57. [AMPS] Re: N connectors (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Wed, 21 Oct 1998 00:48:10 +0100; Ahh! N connectors, one of the things that causes me to get up on the soap box. Here goes.... If I remember the Mil Spec right, N connectors are rated at 800 watts max at 150 Mhz. So are BNC's, TNC's; /archives//html/Amps/1998-10/msg00316.html (10,185 bytes)
58. [AMPS] need info on PL-172 pentode (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Wed, 05 Aug 1998 22:58:22 +0100; Lane, The Penta Labs PL-172 is also known as the PL-8295. Don't have a clue why there are two numbers as they share the same data sheet. Cathode - Coated unipotential heater voltage 6.0 volts heater; /archives//html/Amps/1998-08/msg00045.html (7,937 bytes)
59. [AMPS] Low Output on 10 meters (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Wed, 26 Aug 1998 22:35:01 +0100; Re tuning the input networks on any GG amp: I know this has been said before, but I'll say it again. First determine the cathode impedance of the tubes in your amp. Ask somebody, look it up, or calcu; /archives//html/Amps/1998-08/msg00218.html (8,753 bytes)
60. [AMPS] 3x4CX250B's (score: 1): Author: w7iuv@axtek.com (Larry Molitor); Date: Wed, 15 Jul 1998 23:05:59 +0100; Just for the record, my 2x4CX250 amp will run 1400 watts out on 144 mhz, as measured on a Bird 43, and crossed checked with two different slugs. I could and did run a pair of these tubes on EME for a; /archives//html/Amps/1998-07/msg00086.html (7,838 bytes)

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