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121. [Amps] brittle shields? and soldering vs crimping (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Wed, 2 May 2012 17:40:28 +0000; Has anyone on Planet Earth ever heard of copper or tined copper "becoming brittle" due to heat? And what about the report of not soldering the center conductor because of the use of high power and 70; /archives//html/Amps/2012-05/msg00069.html (11,376 bytes)
122. Re: [Amps] SB-220 in storage, how to maintain it ??? (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Sat, 5 May 2012 15:32:14 +0000; Mail the amp to me and I will preserve it in same condx as received, no doubt. Bonus, tubes will be well exercised every DXpedition that comes on. Very tnx and 73, Charles Harpole k4vud@hotmail.com _; /archives//html/Amps/2012-05/msg00205.html (10,436 bytes)
123. [Amps] storing radios??? (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Sat, 5 May 2012 16:14:33 +0000; I again am puzzled about how we hams want to baby and pamper our things, our radios. They are lots more rugged than we think, I guess, and it would be better, I think, to just store the thing, whatev; /archives//html/Amps/2012-05/msg00206.html (10,039 bytes)
124. Re: [Amps] DRAKE L4B ON EBAY (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Tue, 5 Jun 2012 10:14:02 +0000; I have had more than one scam attempted on me in buying stuff... this could be a ringer, pushing price up, then ooh the winner did not pay and maybe, you second bidder, just under, will send money no; /archives//html/Amps/2012-06/msg00017.html (10,546 bytes)
125. Re: [Amps] Hunter 2000c Bandit (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Sun, 10 Jun 2012 12:10:44 +0000; Dont forget its high voltage current on the PTT relay, danger for todays rigs. Charles Harpole k4vud@hotmail.com -- _______________________________________________ Amps mailing list Amps@contesting.c; /archives//html/Amps/2012-06/msg00056.html (11,307 bytes)
126. [Amps] great name of Hunter Bandit-2000C (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Wed, 13 Jun 2012 06:24:27 +0000; Great name for an amp.... Gets out like a Bandit. Charles Harpole k4vud@hotmail.com -- _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.co; /archives//html/Amps/2012-06/msg00081.html (8,300 bytes)
127. [Amps] "babying" radios and tubes, can do or not? (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Thu, 14 Jun 2012 07:17:22 +0000; I want to know if there are any REAL benefits from babying a radio or an amp? I hear lots of talk about running lower RF power to "save the finals" or "save the tubes" and even hear people talk about; /archives//html/Amps/2012-06/msg00100.html (8,280 bytes)
128. [Amps] Part 2 of "babying" radios and tubes, can do or not? (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Thu, 14 Jun 2012 07:46:40 +0000; Reading about failures in electronic devices, especially transistors and tubes, it appears that the only positive thing the owner can do to baby his radio is to leave it on all the time. That is, bey; /archives//html/Amps/2012-06/msg00101.html (10,009 bytes)
129. [Amps] Babying radios conclusion (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Fri, 15 Jun 2012 03:49:43 +0000; As my msg say, I asked to eliminate considerations of "mfg defects" or "misuse" (and poor design that traps heat, etc.). These matters were what I specifically eliminated in my questions. I wanted t; /archives//html/Amps/2012-06/msg00126.html (8,395 bytes)
130. [Amps] filament instant heating query (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Fri, 15 Jun 2012 03:59:12 +0000; to check on a supposition............ It appears possible that the sudden application of voltage to a tube filament causes degradation of the filament. What seems to happen? Is it possible that the v; /archives//html/Amps/2012-06/msg00127.html (7,858 bytes)
131. [Amps] tnx tube filament answers (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Sat, 16 Jun 2012 01:54:14 +0000; Oh, the big guns came out on this question, and we got some detailed, scientific talk as good answers. Congrats on this query and thanks, Charles Harpole k4vud@hotmail.com ___________________________; /archives//html/Amps/2012-06/msg00177.html (6,483 bytes)
132. Re: [Amps] Babying radios conclusion 2 (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Sat, 16 Jun 2012 02:04:51 +0000; The components which "age faster" (citing you) at full load must age only due to increased heat, as per your logical answers. However, a well designed unit should have adequate cooling provided. I gu; /archives//html/Amps/2012-06/msg00178.html (14,553 bytes)
133. [Amps] Alpha sez run it on 220 (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Thu, 21 Jun 2012 04:00:10 +0000; Alpha is very clear on advice... Run Alphas on 220VAC lines and skip the CW/lower voltage position and run it in SSB/hi all the time. Less that that, you are falsely trying to baby your amp (or just; /archives//html/Amps/2012-06/msg00318.html (12,679 bytes)
134. [Amps] tubes without handles (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Thu, 21 Jun 2012 09:34:15 +0000; Tubes without handles are drivers. Charles Harpole k4vud@hotmail.com _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo; /archives//html/Amps/2012-06/msg00323.html (6,478 bytes)
135. Re: [Amps] Alpha 87A owner (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Tue, 10 Jul 2012 01:16:45 +0000; I own an 87a that is of the 1990 vintage but has been back to the factory twice, as late as 2004, and had the upgrades when they did not cost that much... not cheap, but not in that range. At one tim; /archives//html/Amps/2012-07/msg00146.html (13,968 bytes)
136. Re: [Amps] Alpha 9500 tell tale on 87a (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Tue, 10 Jul 2012 03:53:03 +0000; Read the 9500 adverts and see how they tell you what went wrong with the 87a..... Adverts say no more PINs and vy few plugs and sockets. Same as StepIR adverts that NOW stress quality improvements an; /archives//html/Amps/2012-07/msg00151.html (10,980 bytes)
137. Re: [Amps] Alpha 87A ownerS (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Tue, 10 Jul 2012 19:07:08 +0000; I love it when a detailed and factual critique of a radio device emerges and defenders of the baby come out of the woodwork. "Oh, I ran mine in water under frozen ice at 3KW for 43 years continuous,; /archives//html/Amps/2012-07/msg00156.html (18,969 bytes)
138. [Amps] corona on a quad (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Fri, 13 Jul 2012 04:55:44 +0000; My understanding is that corona discharge would be most off a single isolated point, like the tip of a vertical ant or the ends of a yagi elements. I doubt the corners of a quad would act like that a; /archives//html/Amps/2012-07/msg00183.html (15,516 bytes)
139. [Amps] Amplifying RF (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Sat, 28 Jul 2012 11:16:37 +0000; On the simplicity end, I know the full instruction book for building the SB-220 exists and likely all the parts or equiv. Put the parts together in a box and sell it as a box of parts, instruction bo; /archives//html/Amps/2012-07/msg00326.html (9,113 bytes)
140. [Amps] Building amps (score: 1): Author: Charles Harpole <k4vud@hotmail.com>; Date: Sun, 29 Jul 2012 09:02:04 +0000; a ham radio amplifier, I am moving out. 73, Charles Harpole k4vud@hotmail.com _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailma; /archives//html/Amps/2012-07/msg00354.html (7,492 bytes)

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