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101. [Amps] HV ripple voltage (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sun, 8 Nov 2009 03:25:15 +0000 (UTC); Hey amp builders, As a general rule, what would be considered "good" regulation and good ripple of an HV power supply? If the no load voltage for a 3cx800A7 amplifier's power supply is 2500 V, while; /archives//html/Amps/2009-11/msg00115.html (7,448 bytes)
102. Re: [Amps] Advice (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Fri, 4 Dec 2009 17:07:47 +0000 (UTC); One possible advantage of two tubes over a single tube is the blower and airflow. Sometimes using two smaller tubes will require less airflow and have less backpressure than a single tube. Paul Dec; /archives//html/Amps/2009-12/msg00113.html (8,695 bytes)
103. Re: [Amps] Advice (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sat, 5 Dec 2009 21:26:22 +0000 (UTC); When I was writing the original reply I was thinking more along the lines of different tubes for example a single 8877 requires more airflow and has more back pressure than two 3cx800's. Agreed, two; /archives//html/Amps/2009-12/msg00131.html (8,939 bytes)
104. Re: [Amps] Advice (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sat, 5 Dec 2009 23:25:39 +0000 (UTC); Hi Gary, The point of the second paragraph was that with a pair tubes operating under their specificed dissipation rating require less cooling then a single tube operating at or above its dissipation; /archives//html/Amps/2009-12/msg00136.html (12,614 bytes)
105. Re: [Amps] Advice (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sun, 6 Dec 2009 05:11:00 +0000 (UTC); Hi Gary, I don't know if it's a linear relation. Perhaps a typo, but on page 13.19 of the 1995 handbook, it says 12 CFM at 0.09" back pressure for two 3cx800's operating at 400 Watts dissipation ea; /archives//html/Amps/2009-12/msg00148.html (14,604 bytes)
106. Re: [Amps] Question about GS-35b efficiency (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Fri, 18 Dec 2009 16:52:32 +0000 (UTC); Perhaps an 'elite class' solid-state amp will appear somewhere on the market? http://www.thp.co.jp/english/hl_2.5kfx_e.html Paul (KG7HF) _______________________________________________ Amps mailing l; /archives//html/Amps/2009-12/msg00435.html (7,631 bytes)
107. Re: [Amps] Need #9 Allen wrench MUCHO (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 11 Jan 2010 20:16:57 +0000 (UTC); Even if you have a larger hex bolt, you can carefully file or grind it down to fit, although grade 8 is difficult to file. 73, Paul (KG7HF) Message: 5 Date: Mon, 11 Jan 2010 05:09:29 -0800 (PST) From; /archives//html/Amps/2010-01/msg00074.html (7,754 bytes)
108. Re: [Amps] Source for large purchase of toroids? (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sun, 24 Jan 2010 01:11:15 +0000 (UTC); Over the past few months I've had great success with micrometals and mag-inc, both have let me purchase small quantities as well as larger amounts. They've even been kind enough to send samples. 73,; /archives//html/Amps/2010-01/msg00296.html (8,381 bytes)
109. Re: [Amps] MALWARE ALERT FOR RECENT POST (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Tue, 2 Feb 2010 13:06:37 +0000 (UTC); WOW, That doesn't say much for our legal profession here in the US if they [the lawyers] can't figure out that is a scam. But I guess, for the most part, we knew that already. Paul, kg7hf No proble; /archives//html/Amps/2010-02/msg00074.html (7,789 bytes)
110. Re: [Amps] Silk screen alternatives (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Fri, 5 Feb 2010 20:00:26 +0000 (UTC); I didn't think of it before this, but many boat supply houses will do custom stick on decals of whatever size and shape you want. They are water proof and last a long time outside so I would imagin; /archives//html/Amps/2010-02/msg00123.html (8,046 bytes)
111. Re: [Amps] Tube Info Y-739G? (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 15 Feb 2010 05:14:09 +0000 (UTC); Looks like one of the tubes out of a military radar unit, but I think it's an 8940 Paul Decker (KG7HF) -- Message: 1 Date: Sun, 14 Feb 2010 13:45:26 -0700 From: "Bill VanAlstyne W5WVO" <w5wvo@cyberme; /archives//html/Amps/2010-02/msg00398.html (8,561 bytes)
112. [Amps] How much C in PS is too much (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Tue, 23 Mar 2010 16:11:39 +0000 (UTC); Message: 5 Date: Tue, 23 Mar 2010 07:38:36 -0400 From: "Carl" <km1h@jeremy.mv.com> Subject: Re: [Amps] How much C in PS is too much ? To: <dezrat1242@yahoo.com>, <amps@contesting.com> Message-; /archives//html/Amps/2010-03/msg00496.html (7,531 bytes)
113. Re: [Amps] Good engineering (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Wed, 24 Mar 2010 19:06:16 +0000 (UTC); Definately the wrong attitude, but everything designed has a lifespan. Bridges, fire suppression systems and airplanes require periodic inspections. The engineers design to some lenght of time for; /archives//html/Amps/2010-03/msg00564.html (8,888 bytes)
114. Re: [Amps] ripple in B+ supply. (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Thu, 25 Mar 2010 13:56:36 +0000 (UTC); I have to agree, it makes more sense to me to specify which P-P or rms . I know in this context the poster was talking about 50/60 hz , but I think this is even more important when dealing with no; /archives//html/Amps/2010-03/msg00609.html (7,429 bytes)
115. Re: [Amps] Why people don't build amps. (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Fri, 26 Mar 2010 15:44:10 +0000 (UTC); Good post Bill, and on target. Modern systems are extremely complex, and as an active participant in team design, to get a modern product out the door takes the involvement of many engineers with dif; /archives//html/Amps/2010-03/msg00646.html (12,664 bytes)
116. Re: [Amps] liquid cooling (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 5 Apr 2010 17:42:20 +0000 (UTC); Paul (KG7HF) The recent discussion on water cooling amp tubes got me thinking. Again. (not a good thing) _______________________________________________ Amps mailing list Amps@contesting.com http://; /archives//html/Amps/2010-04/msg00105.html (8,257 bytes)
117. [Amps] care and feeding (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 19 Apr 2010 00:44:11 +0000 (UTC); Hi guys, I'm reading over the Eimac "Care and feeding of power tetrodes" because it came up in a search I did. page 8, figure 17 shows a cavity and says "Schematic cavity section of 1250 Mc. amplifie; /archives//html/Amps/2010-04/msg00551.html (6,848 bytes)
118. Re: [Amps] care and feeding (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 19 Apr 2010 01:19:33 +0000 (UTC); thanks Carl. I've got a couple 4x150G coaxial tubes in a cavity and I'm trying to figure out what the operating freq is without actually applying power. I was told they are 1250 Mhz but I'm not sure.; /archives//html/Amps/2010-04/msg00553.html (9,174 bytes)
119. [Amps] Uruguay Amp Project (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Fri, 7 May 2010 20:17:58 +0000 (UTC); Hi Pat, A couple of ideas for you. Firstly, my wife's uncle used to run a very successful motor rebuilding shop in Colombia. Most of his work was for the commercial marine industry. They built and; /archives//html/Amps/2010-05/msg00102.html (9,306 bytes)
120. Re: [Amps] Uruguay Amp Project (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sat, 8 May 2010 01:09:35 +0000 (UTC); Hi Pat, I've been winding my own high frequency power transformers for a while now, and I'm a novice at it. A few months ago, this was posted to the amps reflecter, you might find it of interest. htt; /archives//html/Amps/2010-05/msg00109.html (11,431 bytes)

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