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References: [ +from:ka4inm@tampabay.rr.com: 211 ]

Total 211 documents matching your query.

101. Re: [Amps] Cleaning air-wound coils (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Mon, 03 May 2010 14:54:39 -0400
I think part of the problem with these coils is frequently the thin tin coating is scratched and rubbed off. (copper shows through) A real good cleaning followed by one of the "cold tin" platings wo
/archives//html/Amps/2010-05/msg00035.html (8,513 bytes)

102. Re: [Amps] Importation of Used Tubes, or more generally radio parts (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Tue, 04 May 2010 00:11:02 +0000
First and foremost send tubes that were made in Uruguay. -- Ron KA4INM - The next election, I know what is going to happen, I'm going to help. _______________________________________________ Amps ma
/archives//html/Amps/2010-05/msg00041.html (7,948 bytes)

103. Re: [Amps] Cleaning air-wound coils (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Wed, 05 May 2010 09:40:39 -0400
After thinking about miniductor coils I realized: (skin effect) metal resistivity silver 106 copper 100 annealed copper 89.5 hard drawn gold 65 tin 13 this makes me think the tin coated miniductor co
/archives//html/Amps/2010-05/msg00057.html (9,292 bytes)

104. Re: [Amps] stero to mono (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Sun, 09 May 2010 12:51:37 +0000
Hi Frank Φραγκιαδάκης Παναγιώτης: First; you need an input AUDIO transformer to go between the ONE audio preamplifier and the two x 500 Watts transistor amplifiers that has a single primary winding t
/archives//html/Amps/2010-05/msg00114.html (9,593 bytes)

105. Re: [Amps] A word of Caution for my Ham Radio Brethren! (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Wed, 19 May 2010 02:48:04 +0000
Do copyrights last for ever? -- Ron KA4INM - The next election, I know what is going to happen, I'm going to help. _______________________________________________ Amps mailing list Amps@contesting.co
/archives//html/Amps/2010-05/msg00193.html (9,894 bytes)

106. Re: [Amps] line length magic (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Thu, 20 May 2010 01:40:56 +0000
I've thought long and hard about this and this theory would only work at certain frequencies. So, I don't get it. -- Ron KA4INM - The next election, I know what is going to happen, I'm going to help
/archives//html/Amps/2010-05/msg00213.html (7,029 bytes)

107. Re: [Amps] HV Connectors (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Sun, 23 May 2010 22:41:38 +0000
The most important thing that I learned is to put the connector on the power supply end of the interconnecting cable so if it is not connected there can not be a wire with high Voltage on it rambling
/archives//html/Amps/2010-05/msg00354.html (8,107 bytes)

108. Re: [Amps] backwards plate transformer (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Fri, 11 Jun 2010 22:47:46 +0000
I think it is a matter cooling, the core being a heat sink, to a degree, but I am sure you could ventilate and interleave fins (alternate sheets of aluminum with the windings) to where the outermost
/archives//html/Amps/2010-06/msg00131.html (8,733 bytes)

109. Re: [Amps] Cleaning tubes (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Thu, 17 Jun 2010 12:34:07 -0400
Are the tubes all glass or do they have any metal or ceramic portions? Glass cleaner should clean all glass tubes. I clean silver plated copper and brass with "Tarnex" silver cleaner and I wash it of
/archives//html/Amps/2010-06/msg00177.html (7,018 bytes)

110. Re: [Amps] Cleaning tubes (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Thu, 17 Jun 2010 13:22:57 -0400
That can remove all of the "painted" information, but it won't effect the "etched" tube type number, other than removing the dirt it the pores. -- Ron KA4INM - The problem with socialism is that even
/archives//html/Amps/2010-06/msg00181.html (7,907 bytes)

111. Re: [Amps] Salt water load (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Sat, 17 Jul 2010 12:09:29 +0000
A conductive container must be able to withstand the sodium chloride. Stainless steel can not withstand the sodium chloride for very long at elevated temperatures. -- Ron KA4INM - The next election,
/archives//html/Amps/2010-07/msg00193.html (8,422 bytes)

112. Re: [Amps] Dummy load, tuner, antennas, amps, coax length... (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Mon, 09 Aug 2010 13:24:42 +0000
I have thought about this, but I would put the switch and antenna analyzer between the amplifier and the high power antenna tuner, keeping it's input impedance R75-J0. (I use dipoles with RG-11/U) Th
/archives//html/Amps/2010-08/msg00113.html (8,869 bytes)

113. Re: [Amps] 833A 160 meter amp (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Thu, 12 Aug 2010 21:36:04 +0000
I always thought it was because the grid is closer to the cathode than the plate (even though the cathode has much smaller area than the plate) and because the plate is very far from the grid to tol
/archives//html/Amps/2010-08/msg00184.html (8,235 bytes)

114. Re: [Amps] Why no images allowed? (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Fri, 13 Aug 2010 20:54:48 +0000
/*snip*/ I don't care because I don't worry about any viruses as I use LINUX which is 100% free from infection from all M$ malwear, but viruses are just one reason to dis-allow binaries. Another big
/archives//html/Amps/2010-08/msg00197.html (8,904 bytes)

115. Re: [Amps] Why no images allowed? (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Sun, 15 Aug 2010 01:57:44 +0000
_____________________ /| /| | | / O O\__ | trolls. Thank you. | / \ | --Mgt. | / \ \|_____________________| / _ \ \ || / |\____\ \ || / | | | |\____/ || / \|_|_|/ | _|| / / \ |____| || / | | | --| *
/archives//html/Amps/2010-08/msg00205.html (9,484 bytes)

116. Re: [Amps] Why do tubes cost so much? (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Mon, 30 Aug 2010 01:05:17 +0000
I believe it is because the grid assembly must be hand aligned and welded in place with great precision (and the screen grid aligned with the cathode and grid assemblies when present) to result in th
/archives//html/Amps/2010-08/msg00446.html (9,947 bytes)

117. Re: [Amps] vacuum relay problem (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Tue, 31 Aug 2010 03:39:16 +0000
Not so fast, if the "vertical channel switching" was not set on "chopped" this test is invalid. "Alternate channel switching" will sync to first one trace then the other. Be sure your 'scope is trigg
/archives//html/Amps/2010-08/msg00482.html (8,816 bytes)

118. Re: [Amps] Forced-air cooling system measurements (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Sun, 12 Sep 2010 20:33:29 +0000
What you say is true, but the airflow across the heat sink of the heat source with a manometer is the established way to measure the cooling air flow. Using the manometer requires proper ducting and
/archives//html/Amps/2010-09/msg00131.html (7,984 bytes)

119. Re: [Amps] 6146 or 2E26 modulator info (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Tue, 21 Sep 2010 00:55:34 +0000
He needs a low level 6 meter AM modulated carrier, high level modulator doesn't have a VFO and would be harder to bash together than a low level "exciter." Any such linear amplifier must be operated
/archives//html/Amps/2010-09/msg00235.html (8,418 bytes)

120. Re: [Amps] 6146 or 2E26 modulator info (score: 1)
Author: Ron Youvan <ka4inm@tampabay.rr.com>
Date: Tue, 21 Sep 2010 03:20:24 +0000
Remember you can use a large audio output transformer (for or out of a guitar amplifier for instance) backwards as a modulation transformer fed by a (solid state?) audio amplifier. (such as a HiFi a
/archives//html/Amps/2010-09/msg00238.html (8,323 bytes)

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