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121. Re: [Amps] Applying HV to PA anodes (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Fri, 17 Sep 2004 18:35:52 -0400
Sirs, According to the later revision of CB-2 on the '77, the bias voltage unkeyed is ~57 volts. When keyed, it goes to 15 volts, and when driven goes to ~8 volts. Hal W4HBM On Fri, 17 Sep 2004 15:06
/archives//html/Amps/2004-09/msg00314.html (8,485 bytes)

122. Re: [Amps] AL1200 (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 22 Sep 2004 20:50:03 -0400
Dear Sir, Mr. Jerry Beugin at Economy Electronics in Lonoke, Arkansas, < economyel@aol.com > < http://www.economyelectronics.com > (501) 676 - 3234, not only sells RF parts for broadcast and amateur
/archives//html/Amps/2004-09/msg00418.html (7,573 bytes)

123. Re: [Amps] upcoming CPI/Eimac move --- TSPA (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 22 Sep 2004 20:56:11 -0400
They spelled the word "location" incorrectly in the paragraph above your observed error. That makes 2. Anybody see any more? _______________________________________________ Amps mailing list Amps@con
/archives//html/Amps/2004-09/msg00419.html (11,079 bytes)

124. Re: [Amps] 20kw Dummy load? (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 22 Sep 2004 21:03:17 -0400
Dear Robin, I sure wish I kept a copy of the photo that was circulating around Bechtel this past winter showing the result of a coax fire that started at the base of a monopole and flared out through
/archives//html/Amps/2004-09/msg00420.html (9,717 bytes)

125. [Amps] 20kw Dummy load? (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 25 Sep 2004 11:23:26 -0400
Dear Will, Some months ago Rich Measures was talking about ordering some special resistors from Ohmite or the-like to fill a need for a project he was doing. In that time I was bench testing the Emtr
/archives//html/Amps/2004-09/msg00450.html (10,120 bytes)

126. [Amps] Marconi (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 2 Oct 2004 11:55:42 -0400
Dear Mr. Williams, As a graduate of the Marconi Technical school I may be able to offer some little knowledge to your project. 1. The Positive (+48V) Battery Return may be an integrated ground, meani
/archives//html/Amps/2004-10/msg00015.html (9,996 bytes)

127. Re: [Amps] Plate choke for HF pi-networks (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sun, 10 Oct 2004 13:38:21 -0400
Dear Bill, The below referenced part was a consideration for the plate choke in the dual 3CPX1500A7 project now underway. Unfortunately, since the anode power supply is now rated at 3807 volts at 3 a
/archives//html/Amps/2004-10/msg00137.html (7,211 bytes)

128. Re: [Amps] 5 kw amps -- why? (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 20 Oct 2004 20:36:59 -0400
After trying out an EMTRON DX-3 and finding it prone to self-oscillation without any neutralization circuitry and susceptible to RF Feedback at 18MHz, (enought to illuminate all the LEDs on the bar g
/archives//html/Amps/2004-10/msg00345.html (7,890 bytes)

129. Re: [Amps] Blowing off steam (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 23 Oct 2004 11:58:44 -0400
Dear Friends, Last summer while on a project in New Jersey I purchased a used wristwatch over E-bay and the item was totally different than the pictures or description, and the seller became suddenly
/archives//html/Amps/2004-10/msg00381.html (8,974 bytes)

130. Re: [Amps] ebay selling (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 30 Oct 2004 12:50:21 -0400
" Ignorance is bliss; stupidity, euphoria." Hal/W4HBM On Thu, 28 Oct 2004 09:53:13 -0500 "Kim Elmore" <Kim.Elmore@noaa.gov> writes: 67&rd=1 _______________________________________________ Amps mailin
/archives//html/Amps/2004-10/msg00520.html (9,096 bytes)

131. [Amps] RangeMaster E-Bay Sale (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 30 Oct 2004 12:48:16 -0400
Dialing into E-Bay and reading the fine print that describes the station I see that in the first paragraph the station is decribed as "100MW." I certainly think 48 Large is a good starting price for
/archives//html/Amps/2004-10/msg00521.html (7,518 bytes)

132. Re: [Amps] Shunt Feed Tower Issues (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Mon, 1 Nov 2004 18:13:26 -0500
Dear Javier, Your absolute best solution is to use a vacuum variable to tune the tower. Choose one with enough KVaR and HV rating to be well beyond 2X your maximum transmitted power so that voltage p
/archives//html/Amps/2004-11/msg00009.html (7,640 bytes)

133. [Amps] Parasitic Oscillation (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 3 Nov 2004 19:50:23 -0500
Will matney raised an issue we have hammered and hammered on this reflector from Day One: Parasitic Oscillations~Phenomenon or Hallucination? Will is mindful of generations of amplifier builders inco
/archives//html/Amps/2004-11/msg00051.html (8,381 bytes)

134. [Amps] Mish-Mash (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Thu, 4 Nov 2004 20:03:11 -0500
Steve, You have never seen real mish-mash until you get a chance to analyze a cheesy cellular base station that has had generations of poorly-educated and lackadaisical technicians making poor connec
/archives//html/Amps/2004-11/msg00089.html (7,527 bytes)

135. Re: [Amps] SB-220 (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Thu, 4 Nov 2004 20:05:20 -0500
Using "toaster wire" is a sure way to drive down that VHF-Q! (It's not a bolt-on deal, however) hal _______________________________________________ Amps mailing list Amps@contesting.com http://lists.
/archives//html/Amps/2004-11/msg00090.html (7,800 bytes)

136. Re: [Amps] A Meeting Ground (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Fri, 5 Nov 2004 21:43:03 -0500
Ad hominem, ad bacculum! (Violence is the last resort of the incompetent) _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/lis
/archives//html/Amps/2004-11/msg00112.html (8,416 bytes)

137. Re: [Amps] Ameritron AL-800H (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Fri, 12 Nov 2004 15:45:03 -0500
Dear Gary, The parasitic killers are not for your neighbors. They are for your family, because the money you might save when not having to buy replacement tubes might very well be spent on them.....
/archives//html/Amps/2004-11/msg00183.html (7,197 bytes)

138. Re: [Amps] HV/Tune-up Procedure for AL-80A (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Fri, 12 Nov 2004 15:32:05 -0500
Dear Scott, You might wish to open the HV circuit and let the tubes cook with just filament voltage applied for about a day. This might serve to prolong the tube life and to prepare them for the shoc
/archives//html/Amps/2004-11/msg00184.html (8,408 bytes)

139. Re: [Amps] Shock hazard? (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Fri, 12 Nov 2004 15:50:18 -0500
Dear Will, Let's see, the a.c. cord is probably not polarized, so that means the chassis can either be hot or neutral, depending upon the insertion..... Nevertheless, I wouldn't want to touch the cha
/archives//html/Amps/2004-11/msg00185.html (7,100 bytes)

140. [Amps] Here's a Shocker (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Fri, 12 Nov 2004 16:21:15 -0500
Dear Friends, Check out the "Current Combinator" used in medical diathermy: < HTTP://www.albany.net/~zardoz/wap.html > Hal Mandel _______________________________________________ Amps mailing list Amp
/archives//html/Amps/2004-11/msg00188.html (6,775 bytes)

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