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341. Re: [Amps] eBay (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Wed, 4 May 2005 06:38:11 -0700
Question: What happens if I see, as an example, a tranceiver worth 500 dollars, current bid is 100 dollars and I bid 9999 dollars? I will get it for 101 dollars or are there any special rules? Answer
/archives//html/Amps/2005-05/msg00048.html (8,330 bytes)

342. Re: [Amps] 3-1000z amp pros n cons (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sat, 7 May 2005 06:18:19 -0700
Hi Joe: The 3-1000 is a nice tube that runs 1500 watts at lower voltage than most. The problem has to do with cost and availability. Therefore, it is not recommended to build one - unless you have a
/archives//html/Amps/2005-05/msg00129.html (7,682 bytes)

343. Re: [Amps] KLM KT34a tribander for sale (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Wed, 11 May 2005 07:59:50 -0700
Does this have 2 x 4CX250 tubes mounted in the boom? Colin K7FM _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-05/msg00157.html (7,128 bytes)

344. Re: [Amps] Gas Regulator Tubes (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Fri, 20 May 2005 16:49:51 -0700
Re: glow in the dark regulator tubes. I believe the radioactive regulator tubes were at much less voltage than the standard VR-105 or VR-150. I used to have a bunch in original boxes. They all had ra
/archives//html/Amps/2005-05/msg00224.html (7,339 bytes)

345. Re: [Amps] Alpha 86 Prob (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Tue, 7 Jun 2005 06:33:04 -0700
"I used two different transceivers--Icom 746 and 756Pro, No difference, More significantly, I NEVER used the amp on CW, so I don't think spikes are the issue. I also checked line voltage and set the
/archives//html/Amps/2005-06/msg00055.html (8,379 bytes)

346. Re: [Amps] RE : copper or silver in tank circuit? (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Fri, 17 Jun 2005 12:45:41 -0700 (GMT-07:00)
Copper corrodes Silver conducts Gold corrupts Colin K7FM _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-06/msg00137.html (7,037 bytes)

347. Re: [Amps] Alpha 87 Omega (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Tue, 28 Jun 2005 06:37:29 -0700
Hey, watch that about us old guys. I am just finishing restoration of a basket case KWM-380, which had multiple holes drilled into the top, a big chunk missing from the cast aluminum front panel and
/archives//html/Amps/2005-06/msg00275.html (8,342 bytes)

348. Re: [Amps] solder vs. High temp. (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sat, 23 Jul 2005 15:54:37 -0700
There are a number of sites that list the melting point of various solders. A quick search yielded http://et.nmsu.edu/~etti/fall97/electronics/solder.html I am still amazed that an alloy can melt at
/archives//html/Amps/2005-07/msg00284.html (7,202 bytes)

349. [Amps] Network Analyzer (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sat, 23 Jul 2005 19:20:14 -0700
Many of you use or appreciate network analyzers, in working with hf amps. Ten Tec has just announced a low cost ($655) vector network analyzer, made in association with TAPR, and previously written u
/archives//html/Amps/2005-07/msg00291.html (6,729 bytes)

350. Re: [Amps] Amps Digest, Vol 32, Issue 12: Metric system (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Thu, 4 Aug 2005 09:30:39 -0700 (GMT-07:00)
This problem of different measurements depending upon the temperature can be solved, if making aluminum antennas, by using an aluminum ruler, which means the antenna will always measure the same len
/archives//html/Amps/2005-08/msg00101.html (8,929 bytes)

351. Re: [Amps] Metric system (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Thu, 4 Aug 2005 11:24:54 -0700 (GMT-07:00)
I recall that one of the first transatlantic television transmissions was designed to reflect off an orbiting reflector. It was live between London and the US. The screens went blank. Turns out the e
/archives//html/Amps/2005-08/msg00113.html (8,690 bytes)

352. Re: [Amps] Metric system (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Fri, 5 Aug 2005 08:53:40 -0700 (GMT-07:00)
I am getting to the age when I would like to convert from the present system of measuring age in years to something with a bit more time between anniversaries - something like 500 days per measuremen
/archives//html/Amps/2005-08/msg00177.html (7,662 bytes)

353. Re: [Amps] Metric system (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Fri, 5 Aug 2005 10:05:49 -0700 (GMT-07:00)
Well, as usual, once I posted the question of how to reduce yearly aging, I figured out the answer - and it is quite simple. The unit of aging is the year - which is the time it takes the earth to re
/archives//html/Amps/2005-08/msg00182.html (9,828 bytes)

354. Re: [Amps] Amps Digest, Vol 32, Issue 36 (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sun, 7 Aug 2005 15:25:18 -0700
"In all other HF 8877 amplifiers they are there. Was Dick Ehrhorn and every other 8877 amp mfg out of line for using a parasitic suppressor?" Rich, this is an interesting observation. In the past, yo
/archives//html/Amps/2005-08/msg00261.html (7,840 bytes)

355. Re: [Amps] Amps Digest, Vol 32, Issue 36 (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sun, 7 Aug 2005 22:07:30 -0700
1. In order to reduce VHF gain, parasitic suppressors need to have a low-Q. In your opinion, do Ag and Cu contribute to a low-Q? 2. Even a medium-Q parasitic suppressor is better than no suppressor w
/archives//html/Amps/2005-08/msg00277.html (9,627 bytes)

356. Re: [Amps] FW: AMERITRON AL-1500 ???? (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Mon, 8 Aug 2005 08:54:32 -0700 (GMT-07:00)
"To me, an interesting aspect of the debate is that apparently no one who denies that parasites are possible has taken a college-level course in Alternating Current Circuit Analysis." Response: Rich,
/archives//html/Amps/2005-08/msg00293.html (9,207 bytes)

357. Re: [Amps] Step Start (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Fri, 12 Aug 2005 09:49:21 -0700 (GMT-07:00)
George asked: "Why do most step-start circuits in the primary of the HV transformer have tow resistors and relay contacts shorting the resistors in EACH (i.e. BOTH) leads of the primary? Doesn't a si
/archives//html/Amps/2005-08/msg00440.html (8,824 bytes)

358. Re: [Amps] Square plate choke ? (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Mon, 15 Aug 2005 06:29:11 -0700
Old crystal sets used to be wound on square wood. It made it easier to scrape the insulation off for tuning. You need not figure out the formula. Just build one and measure the inductance and resonan
/archives//html/Amps/2005-08/msg00524.html (7,392 bytes)

359. Re: [Amps] caps SB-200 (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sat, 20 Aug 2005 15:02:00 -0700
If there is less than normal capacitance, the dc voltage will be lower, because the capacitors will not charge to 1.4. If one of the two legs has no capacitance, it would do what has been described a
/archives//html/Amps/2005-08/msg00623.html (7,286 bytes)

360. Re: [Amps] plate choke (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Fri, 26 Aug 2005 08:48:26 -0700 (GMT-07:00)
When I see such lines as: It is not an old wives tale, that a poorly made choke will fail and to avoid burning your hair, park your resonances with care I see something poetic just behind the grid di
/archives//html/Amps/2005-08/msg00697.html (12,168 bytes)

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