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61. Re: [Amps] RE: Alpha 87A Problems Solved (score: 1): Author: ka1xo@juno.com; Date: Mon, 1 Mar 2004 00:54:47 GMT; Dear Andy, A method I use to normalize the inputs of my various amplifiers is to switch the transceiver output directly into a 50 ohm dummy load, hit the antenna tuner start button and let the radio; /archives//html/Amps/2004-02/msg00314.html (7,424 bytes)
62. [Amps] oil-filled capacitor operating position (score: 1): Author: ka1xo@juno.com; Date: Mon, 1 Mar 2004 01:12:31 GMT; Gents, What can you tell me about oil-filled capacitors in the 20 to 40 uF range, eith a DC working voltage of 3 to 5 KV, on the subject of operating position and being paralleled? Do large cans need; /archives//html/Amps/2004-02/msg00318.html (6,456 bytes)
63. Re: [Amps] AL-1200 Intermittent HV Short (score: 1): Author: ka1xo@juno.com; Date: Mon, 8 Mar 2004 00:52:17 GMT; Hi Ed, Regards from UPS destruction-headquarters. Reid Brandon from EIMAC suggested something very unique: Greyhound Bus Terminal-to-terminal package shipping. No more expensive than UPS; you pick it; /archives//html/Amps/2004-03/msg00074.html (7,395 bytes)
64. Re: [Amps] RJ-1A / HC-1 vacuum relay source? (score: 1): Author: ka1xo@juno.com; Date: Thu, 11 Mar 2004 07:46:24 GMT; Vacuum Relays may be found on the Surplus Sales of Nebraska website. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo; /archives//html/Amps/2004-03/msg00101.html (6,723 bytes)
65. Re: [Amps] AL-1200 Intermittent HV Short (score: 1): Author: ka1xo@juno.com; Date: Thu, 11 Mar 2004 08:03:11 GMT; Dear Jim, FedEx paid off on the EMTRON DX-3 damage claim after 13 weeks of denial, only because WABC Radio and an attorney were involved. They paid because we asked for an independent third-party ana; /archives//html/Amps/2004-03/msg00102.html (9,779 bytes)
66. Re: [Amps] Switch-mode HV power supply (score: 1): Author: ka1xo@juno.com; Date: Wed, 17 Mar 2004 01:00:19 GMT; The switch-mode power supply design has replaced the ferro-resonant transformer (Class-A) product used in the telecomms world. A rectifier putting out 100 amps at negative forty-eight volts weighed-i; /archives//html/Amps/2004-03/msg00183.html (8,867 bytes)
67. Re: [Amps] SELL: Stancor 5VCT@ 30a Filament Xmfr (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Wed, 17 Mar 2004 09:17:07 -0500; Dear Ron, It's a shame that I'm so far into the desktop 11.4 KW 3CPX1500A7's - driven amplifier. If the D7 isn't a hoax imagine what a desktop two-holer D7 would do? I bet Peter Dahl would just love; /archives//html/Amps/2004-03/msg00186.html (7,794 bytes)
68. Re: [Amps] 160 meter tuned circuit (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Wed, 17 Mar 2004 09:19:33 -0500; Dear Larry, A very simple solution is to use a decent antenna tuner in between the exciter and the amplifier! Hal Mandel KA1XO On Tue, 16 Mar 2004 17:52:15 -0600 "Larry" <wb9f@yourclearwave.com> writ; /archives//html/Amps/2004-03/msg00187.html (7,882 bytes)
69. [Amps] Re: insulation (score: 1): Author: ka1xo@juno.com; Date: Fri, 26 Mar 2004 05:53:31 GMT; Dear John, (and friends), Tomorrow, an older gentleman who runs a small motor-rewinding business in East Rutherford is allowing me to come by the shop in the morning where he and I will fabricate a p; /archives//html/Amps/2004-03/msg00274.html (7,959 bytes)
70. Re: [Amps] SB--200 on 160m (score: 1): Author: ka1xo@juno.com; Date: Wed, 31 Mar 2004 00:51:36 GMT; Sir, Rich Measures website, << HTTP://www.somis.org >> has an excellent section on adding 160 meter operations to amplifiers, with considerations not easily found elsewhere. "Avoid re-inventing the w; /archives//html/Amps/2004-03/msg00358.html (6,628 bytes)
71. Re: [Amps] filament supply options (score: 1): Author: ka1xo@juno.com; Date: Sun, 25 Apr 2004 22:56:42 GMT; Dear Steve, Does your intended amplifier use the filament to inject the input RF into the tube circuitry, or is one side of the filament perhaps tied to the cathode pin(s) on the tubes, with suitable; /archives//html/Amps/2004-04/msg00200.html (9,027 bytes)
72. [Amps] ALPHA 77Sx Bandswitch (score: 1): Author: ka1xo@juno.com; Date: Sun, 25 Apr 2004 23:44:26 GMT; Gents, In reassembling the 'Sx and looking closely at the bandswitch, it is seen that the schematic diagram published in 1980 doesn't match the wired configuration. The added padding cap lead for the; /archives//html/Amps/2004-04/msg00201.html (7,275 bytes)
73. [Amps] mega mobile (score: 1): Author: ka1xo@juno.com; Date: Wed, 28 Apr 2004 04:15:42 GMT; Out here in North Jersey one of the two big used-tube guys was telling me that he has a steady stream of CB'ers showing up at his website looking for hi-mu tetrodes from broadcast applications just t; /archives//html/Amps/2004-04/msg00235.html (7,922 bytes)
74. Re: [Amps] exciter compression ?? (score: 1): Author: ka1xo@juno.com; Date: Sun, 16 May 2004 21:34:55 GMT; Dear Dan, In our current project of adding Multi Carrier Power Amplifiers to Base Transmitting Stations we are dealing with just about the same issue you speak of in your post. The exciter radios in; /archives//html/Amps/2004-05/msg00138.html (7,505 bytes)
75. Re: [Amps] Transformer frequency differences (score: 1): Author: "ka1xo@juno.com" <ka1xo@juno.com>; Date: Fri, 21 May 2004 23:31:04 GMT; When I was folling around with that 50 hertz primary tetrode amplifier the D.C. HV supply was 15 percent higher than the recorded measurments at the 50 hertz alignment jig at the manufacturer. ______; /archives//html/Amps/2004-05/msg00191.html (6,944 bytes)
76. [Amps] "Gammer Match" (score: 1): Author: "ka1xo@juno.com" <ka1xo@juno.com>; Date: Tue, 25 May 2004 21:47:14 GMT; In cellular telephone construction the "Gammmer Match" is the successful sweep test done on the C sector, just like the "Alpher" and "Baetter" sectors. The vernacular usage is the sweep testing tech; /archives//html/Amps/2004-05/msg00236.html (6,619 bytes)
77. Re: [Amps] Line Isolators for RF feedback (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Fri, 30 Jul 2004 00:19:40 -0400; Seconding the message below I add my personal endorsement to Radio Works.com. When moving my shack from the 12 month "dxpedition" in Secaucus, New Jersey to my home in Kentucky, a severe case of RF f; /archives//html/Amps/2004-07/msg00235.html (7,915 bytes)
78. Re: [Amps] Line Isolators for RF feedback (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Wed, 11 Aug 2004 10:17:02 -0400; Dear Peter, Some fourteen years ago, Rich Measures wrote an article that appeared in QST magazine called A BALANCED BALANCED ANTENNA TUNER. This design firstly moves the balun to the input of the imp; /archives//html/Amps/2004-08/msg00096.html (11,898 bytes)
79. Re: [Amps] OT - Bristol wrenches (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Wed, 11 Aug 2004 10:19:29 -0400; Dear Sirs, www.mgs4u.com/RF-Microwave/fixedCap.htm sells Bristol wrenches. On Tue, 10 Aug 2004 15:33:38 +0100 Steve Thompson <g8gsq@ic24.net> writes: _______________________________________________ A; /archives//html/Amps/2004-08/msg00097.html (7,862 bytes)
80. Re: [Amps] Airpax Circuit Breaker? (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Wed, 11 Aug 2004 10:02:13 -0400; Dear Craig, It is with utmost caution that I advise you not to alter or modify the AIRPAX circuit breaker you mention below. If you need an unfused switch, then purchase one specifically for that. A; /archives//html/Amps/2004-08/msg00098.html (8,719 bytes)

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