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Total 85 documents matching your query.

61. [Amps] 2 Ways of Gettering... (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Tue, 13 Sep 2011 07:41:41 -0700
Hello Willy, What I learned from this forum, was a second gettering process, after being familiar with the first, and which I have used on 3-500Z family of tubes. That is the process of running the p
/archives//html/Amps/2011-09/msg00066.html (7,534 bytes)

62. Re: [Amps] Need spec for Jennins type U (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Mon, 14 Nov 2011 07:25:08 -0800
Nebraska Radio has a catalog with a lot of photos and Specs: http://www.surplussales.com/VaccumVarCaps/VVC5.html Best Regards, Pat Barthelow AA6EG _______________________________________________ Amps
/archives//html/Amps/2011-11/msg00062.html (9,982 bytes)

63. [Amps] Estimating CCS, I CAS, Plate Dissipation by Eyeball 4-400As (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Wed, 23 Nov 2011 06:41:25 -0800
Friends, I have always been in admiration and awe to watch a Glass tube QRO Amp in full song. In the case of 4-400As or 3-500Z tantalum plates, wile being a teenager-ham, I tended to wince a little a
/archives//html/Amps/2011-11/msg00119.html (8,519 bytes)

64. [Amps] Info wanted SSPA, 7000 and 8000 series by Rohde and Swartz (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Mon, 5 Dec 2011 08:06:39 -0800
Friends, I am looking for hands on info, or data books on the Rohde and Schwarz TV and other use, Solid State Amps. Series 7000 and Series 8000. There may be some available surplus at decent prices P
/archives//html/Amps/2011-12/msg00042.html (7,142 bytes)

65. Re: [Amps] Warm up and on time question... (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Wed, 14 Dec 2011 11:56:36 -0800
Here is an idea to help instant on Tubes, reduce the cold to hot current shock cycles. I was going to say install a Variac in the filament circuit. Variacs to handle 200 watts are not so expensive an
/archives//html/Amps/2011-12/msg00112.html (13,048 bytes)

66. Re: [Amps] Warm up and on time question... (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Sun, 18 Dec 2011 09:24:00 -0800
I have been thinking about what Roger and Carl just mentioned about front panel modes that would be nice for amp flexibility. Why not find the best key fob short range on off switch widget out there,
/archives//html/Amps/2011-12/msg00142.html (11,638 bytes)

67. Re: [Amps] Shipment of large old tubes (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Wed, 21 Dec 2011 09:30:33 -0800
I googled Aircraft Gyro Shipping, and got a lot of relevant information, including Service Ships for Aircraft Gyros, perhaps one of the most fragile instruments commonly shipped, in the airline Avion
/archives//html/Amps/2011-12/msg00177.html (12,719 bytes)

68. [Amps] SB 221 Opened up, for upgrades, repairs (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 5 Jan 2012 08:44:49 -0800
Friends, I was asked to look at and do appropriate repairs /upgrades for a Heathkit SB 221. Photo album of As-found 221, and a W8JI photo, also, are at: http://www.facebook.com/media/set/?set=a.23226
/archives//html/Amps/2012-01/msg00057.html (10,452 bytes)

69. [Amps] QRO Swap Shop at CERN (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Sun, 29 Jan 2012 17:41:39 -0800
Swap Shop newsletter for Power Hungry QRO RF engineers... Swap Shop postings for a place where KW amplifiers are low level drivers. CERN looks like a cool place to work in RF QRO! http://www.cap.bnl.
/archives//html/Amps/2012-01/msg00281.html (6,605 bytes)

70. [Amps] Alternative input network Upgrade for SB 220 (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Sun, 5 Feb 2012 10:56:11 -0800
Friends, Somewhere I saw a 3 -500Z input network aftermarket kit that was a long narrow board with the coil/cap combos mounted side by sideon the board, and available for 3-500Z or perhaps SB 221 ins
/archives//html/Amps/2012-02/msg00023.html (7,342 bytes)

71. Re: [Amps] Source for plate xfrmer (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Wed, 15 Feb 2012 07:50:22 -0800
Hey, I wonder if a friendly visit or call to the Local Chapter of SBE (Society of Broadcast Engineers), could result in a look in their storage sheds, for an old Tube Broadcast TX power supply, that
/archives//html/Amps/2012-02/msg00172.html (12,158 bytes)

72. [Amps] 432 Cavity Amps; Thomson TH 331 (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 1 Mar 2012 08:18:34 -0800
Friends, After being offered for free, a Working Pull complete Tetrode cavity TV amplifier on 470mhz, (Sans power supplies which would have to be built) and with possible plans to make a moonbounce A
/archives//html/Amps/2012-03/msg00006.html (8,461 bytes)

73. [Amps] Sourcing HV Air Dielectric Caps (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 22 Mar 2012 11:58:13 -0700
Friends, I discovered an endless source of HV Air Capacitors, from another application. Might be good for KW amps, or QRO antenna Tuner Components. The local Goodwill Store, has large numbers of Air
/archives//html/Amps/2012-03/msg00236.html (7,863 bytes)

74. Re: [Amps] Tubes vs. Solid State (was) Expert Amps 2K-FA: AnyOpinions ? (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Mon, 30 Apr 2012 08:21:00 -0700
Are there any on-line references with engineeriing information to design retrofitted water cooling hardware to existing large Heat sinks? Are there such things to buy, as aluminum tube extrusions, s
/archives//html/Amps/2012-04/msg00291.html (15,653 bytes)

75. [Amps] Alpha 76A 3 holer.... happy with just 2 tubes? (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Tue, 12 Jun 2012 07:03:47 -0700
Friends, Have an Alpha 76A for sale, with 3 tube PA, and legitimate questions of concern are voiced, for the very expensive finals, no longer made, by prospective buyers. If one of the three finals f
/archives//html/Amps/2012-06/msg00070.html (7,612 bytes)

76. Re: [Amps] Alpha 76A 3 holer.... happy with just 2 tubes? (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Wed, 13 Jun 2012 09:20:52 -0700
Thanks Roger, I should have been more correct by saying the were no longer made, (by Eimac) Best Regards, Pat Barthelow _______________________________________________ Amps mailing list Amps@contesti
/archives//html/Amps/2012-06/msg00089.html (9,303 bytes)

77. Re: [Amps] filament instant heating query / simple remedy (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Tue, 19 Jun 2012 17:36:27 -0700
Don, "Sparkys" are what Avionics Maintenance Techs are called almost universally in the Air Carrier Airline Maintenance business.. Best Regards, Pat Barthelow AA6EG __________________________________
/archives//html/Amps/2012-06/msg00290.html (9,529 bytes)

78. Re: [Amps] tubes without handles (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 21 Jun 2012 06:59:13 -0700
Here is a tube with a different style handle. 7.5KW TV cavity PA at about 470 Mhz. Click right arrow for picture show, twice, to see side view photo. https://skydrive.live.com/?cid=2eb5c45df634a712#c
/archives//html/Amps/2012-06/msg00334.html (9,851 bytes)

79. Re: [Amps] tubes without handles (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 21 Jun 2012 07:27:19 -0700
Tube era, IPA, at 7KW, with a $8K tube cost. Dont know the total commercial cost for the cavity system shown. What would a 7KW output TV SSPA on 470 mhz cost, ballpark? ______________________________
/archives//html/Amps/2012-06/msg00339.html (9,647 bytes)

80. Re: [Amps] Tube Theory? (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 21 Jun 2012 09:17:39 -0700
A single site mother lode of Tube information, many links: http://www.tubebooks.org/tube_data.htm What it does not explain is how/why there are companies that are able to sell 200 watt TUBE audio amp
/archives//html/Amps/2012-06/msg00341.html (11,258 bytes)


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