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References: [ +from:philc@texascellnet.com: 241 ]

Total 241 documents matching your query.

141. Re: [Amps] 3CV1500A7 + Mods for 8877 Upgrade (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 7 Feb 2007 00:47:42 -0600
This is an Alpha problem common to many of their amps built pre-1985 that have a common HV-filament-control transformer. The 77DX/SX are included in this group. These are the ones I have experience
/archives//html/Amps/2007-02/msg00111.html (11,001 bytes)

142. Re: [Amps] General question on filament life (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Thu, 8 Feb 2007 17:58:48 -0600
It depends upon the amplifier that you are using. The stock filament transformer on the SB-220 will not put out excessive current at turn-on due to the way it is wound; i.e. "tailor-made for the loa
/archives//html/Amps/2007-02/msg00144.html (10,462 bytes)

143. Re: [Amps] General question on filament life (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Thu, 8 Feb 2007 18:12:11 -0600
I have 2 amps here; one is "instant-on" and one has a 4 minute delay at start-up. The latter is turned on every time I turn on my transceiver. I don't think of it as a separate "accessory." I use it
/archives//html/Amps/2007-02/msg00146.html (9,336 bytes)

144. Re: [Amps] Thoriated tungsten lifetime when idling tspa (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 9 Feb 2007 15:00:38 -0600
The way Henry deals with #2 above is inserting a 10 ohm 50 watt power resistor in series with one side of the 240 volt primary of the filament transformer. This is on their 3X3 amps. There are 6 tap
/archives//html/Amps/2007-02/msg00168.html (7,881 bytes)

145. Re: [Amps] Seimens SVP tspa (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Thu, 15 Feb 2007 17:03:34 -0600
I wonder also, John. You could no more "home brew" one of these than you could make a diode or transistor! (((73))) Phil, K5PC _______________________________________________ Amps mailing list Amps@
/archives//html/Amps/2007-02/msg00253.html (8,872 bytes)

146. Re: [Amps] Plate Load Calc. (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 2 Mar 2007 21:03:20 -0600
I had Reid Brandon of Eimac do the numbers and circuit suggestions several years ago when I built my 3X3 160 meter mono-bander. Working backward through the math, he used 1.875 for the K factor for
/archives//html/Amps/2007-03/msg00017.html (7,731 bytes)

147. Re: [Amps] MOV Sizing (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Sat, 3 Mar 2007 14:24:53 -0600
Good thought, good solution, Bob. I installed a Waber Power Master unit on my service entrance panel when I built the ham shack several years ago. This protects everything, and saves having to put M
/archives//html/Amps/2007-03/msg00030.html (8,361 bytes)

148. [Amps] Ooooops! (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 27 Apr 2007 19:36:42 -0500
Sorry, my E-Mail went bonkers! Please disregard my ARES message! Phil, K5PC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/l
/archives//html/Amps/2007-04/msg00350.html (6,225 bytes)

149. Re: [Amps] 6 mtrs (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Tue, 25 Sep 2007 18:23:35 -0500
I can't see why a picture or 2 of the converted amp can't be posted somewhere. Larry, Karl, and other interested parties: There is a wealth of information on the SB-200. All you have to do is Google
/archives//html/Amps/2007-09/msg00303.html (7,452 bytes)

150. [Amps] Test (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Thu, 6 Mar 2008 12:57:13 -0600
Test _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2008-03/msg00055.html (7,437 bytes)

151. Re: [Amps] ferrite in RF chokes for PAs (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Thu, 6 Mar 2008 13:13:43 -0600
The better news is that it worked in many thousands of amps built by Rohde&Schwarz from about 1958 to 1990 for the military and other gouvernment use. The early version was 500W AM/CW/FSK with a sing
/archives//html/Amps/2008-03/msg00057.html (8,414 bytes)

152. Re: [Amps] HOME BREW 10-80 METER LINEAR AMPLIFIER 3-500ZG - eBay (item170202863660 end time Mar-25-08 18:30:00 PDT) (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Mon, 24 Mar 2008 16:14:10 -0500
Always interesting stuff on E-pay..I wonder how long the 3-500 lasts mounted horizontal?? I've seen more than one die quickly from guys tryin to just servive a 3-500 amp laying on it's side. And of c
/archives//html/Amps/2008-03/msg00242.html (8,067 bytes)

153. Re: [Amps] QST SB-220 Article (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 26 Mar 2008 10:27:34 -0500
Maybe it is just the April issue, but is anyone else bothered by the article in QST on converting an SB-220 for 6 meters? I read in disbelief about all the Nichrome strap used in the amplifier. I tho
/archives//html/Amps/2008-03/msg00282.html (7,333 bytes)

154. Re: [Amps] L4-B WARC mods? (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 28 Mar 2008 14:31:46 -0500
Are there any "easy" WARC-band modifications for the Drake L4-B? My L4-B won't load up on 12 and 17 meters, as suggested by some, by using the 10 meter and 15 meter band switches. I only get about a
/archives//html/Amps/2008-03/msg00326.html (6,869 bytes)

155. Re: [Amps] YC-156 grid ring (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Thu, 3 Apr 2008 11:30:52 -0500
I just bolt my YC-156's directly to the chassis. Did I make a boo boo??? Phil, K5PC Do you mean "mounting plates" N8NH _______________________________________________ Amps mailing list Amps@contestin
/archives//html/Amps/2008-04/msg00074.html (8,809 bytes)

156. Re: [Amps] 8877 dishwasher? (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Thu, 3 Apr 2008 11:36:01 -0500
Is it true I can place my 8877 in the dishwasher? you may need to reply direct, Ed N5BLZ That's okay, Ed. Depending on solutions used to clean the tube, you may loose the red lettering. I live in a d
/archives//html/Amps/2008-04/msg00075.html (7,564 bytes)

157. Re: [Amps] 3CX3000A7 input impedance (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 16 Apr 2008 13:02:24 -0500
A friend of mine is building up a 3CX3000A7 amp and asked me what the input impedance is. Seems that I used 50 ohms when I built mine but I'm not sure. The Eimac tech sheet says a 3x3 running in AB2
/archives//html/Amps/2008-04/msg00217.html (7,602 bytes)

158. [Amps] Repair Source for RF Applications P-5000 Wattmeter (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Wed, 28 May 2008 12:22:06 -0500
My P-5000 has bitten the dust. It seems that the company has also gone QRT. Bruce Knox, W8GN was the owner; that call now belongs to someone else! I fear the worst. Any sources out there that might b
/archives//html/Amps/2008-05/msg00209.html (6,734 bytes)

159. Re: [Amps] Alpha 77dx (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 6 Jun 2008 13:09:14 -0500
There are 3 kinds of 2-tube 77 amps that I can think of off the top of my head: 1. 77SX, produced by the factory as such. 2. 77DX, converted with a kit sold by Alpha to dealers or pro technicians. So
/archives//html/Amps/2008-06/msg00043.html (9,141 bytes)

160. Re: [Amps] Alpha 77dx (score: 1)
Author: "Phil Clements" <philc@texascellnet.com>
Date: Fri, 6 Jun 2008 13:33:13 -0500
Funny how much expense and work folks will endure for 3 db! Theo K4MO During the 77DX/SX era, 100% 8877 MRI pulls were very reasonably priced, and readily available. Even the entire kit with a new Ei
/archives//html/Amps/2008-06/msg00045.html (7,812 bytes)

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