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201. Re: [Amps] Advice needed for SS amp (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Thu, 6 Jun 2013 11:04:56 +0000 (UTC); Agree! I bought a rack mount assembly which has 6 - 50v @ 50 A supplies in it. 3 x 3 in parallel. I only need to run one for legal limit. As far as heat removal, it's not too difficult of a problem t; /archives//html/Amps/2013-06/msg00089.html (9,565 bytes)
202. Re: [Amps] Advice needed for SS amp (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sun, 9 Jun 2013 16:38:17 +0000 (UTC); I missed much of the thread on making capacitors, but what about using ceramic "chips" and copper spray? _______________________________________________ Amps mailing list Amps@contesting.com http://l; /archives//html/Amps/2013-06/msg00202.html (8,290 bytes)
203. [Amps] spray on paint (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Tue, 11 Jun 2013 16:13:52 +0000 (UTC); The ceramic chip and spray paint wasn't very well thought out. What gave me the idea is that I use copper based paint as bottom paint on my fiberglass boat. I know there is some sort of capacitance b; /archives//html/Amps/2013-06/msg00212.html (8,866 bytes)
204. Re: [Amps] Direct rectification of AC mains to derive the amp (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 16 Sep 2013 13:55:19 +0000 (UTC); I agree with Alex, I haven't done it, but it should be possible. Simply build the amp in a similar way as the switcher in a smps is built. Isolate the input and output of the power transistors and fl; /archives//html/Amps/2013-09/msg00198.html (8,398 bytes)
205. [Amps] 115 to 220 VAC (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sat, 5 Oct 2013 16:39:31 +0000 (UTC); Hi guys, I'm traveling abroad to south America where the standard outlet power is going to be 115 VAC. I'm bringing an amp with a solid state smps rated from 190 - 240 VAC. Is there a converter to us; /archives//html/Amps/2013-10/msg00052.html (7,324 bytes)
206. [Amps] AL-800H transformer (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sat, 12 Oct 2013 18:01:13 +0000 (UTC); Hi Gang. I have an AL-800H transformer, it is the only HV xmfr I have left. It looks like it will produce about 2250 VDC. I need to use it in another project to produce around 1100VDC no load, max 13; /archives//html/Amps/2013-10/msg00208.html (6,807 bytes)
207. [Amps] transformer winding (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 17 Mar 2014 00:50:09 +0000 (UTC); Hello amplifier experts. I'm trying something new, I'm going to attempt to rewind a transformer and am looking for advice. I'm starting with a microwave oven transformer. There are a couple of reason; /archives//html/Amps/2014-03/msg00079.html (8,513 bytes)
208. Re: [Amps] 50 V high current power supplies (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Wed, 26 Mar 2014 12:52:18 +0000 (UTC); I have a few of these HP supplies up on ebay, they have worked great for me. http://www.ebay.com/itm/281289069370?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 73, Paul kg7hf Message: 7 Date: W; /archives//html/Amps/2014-03/msg00154.html (7,824 bytes)
209. [Amps] amplifier parts (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Wed, 26 Mar 2014 13:44:20 +0000 (UTC); In case someone needs other amplifier related items and parts: http://www.ebay.com/sch/prdecker/m.html?item=281276808606&ssPageName=STRK%3AMESELX%3AIT&rt=nc&_trksid=p2047675.l2562 ___________________; /archives//html/Amps/2014-03/msg00156.html (6,666 bytes)
210. Re: [Amps] transformer winding (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sat, 5 Apr 2014 16:23:06 +0000 (UTC); Thanks everyone, it doesn't look like a MOT anymore. I found a bobbin that fit perfectly for $2.50, it made things a lot easier. It just might be possible to use MOTs! I haven't applied power yet, bu; /archives//html/Amps/2014-04/msg00056.html (7,839 bytes)
211. [Amps] antenna analyzer. (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sat, 5 Apr 2014 19:05:36 +0000 (UTC); Hello amp builders, I've been attempting to convert some commercial vhf and uhf amplifiers over to the ham bands. The gear operates in the 150 Mhz and the 550 Mhz range. Someone a while back said I c; /archives//html/Amps/2014-04/msg00057.html (6,974 bytes)
212. [Amps] dual cavity (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Wed, 9 Apr 2014 00:52:53 +0000 (UTC); I'm making some good headway on my projects here, so time to throw out another question. I have two 2c39 cavities, is it possible to use a Wilkinson combiner or some other method to parallel them up?; /archives//html/Amps/2014-04/msg00096.html (6,711 bytes)
213. Re: [Amps] dual cavity (score: 1): Author: kg7hf@comcast.net; Date: Wed, 9 Apr 2014 01:52:29 +0000 (UTC); thanks mike, i was looking at his combiners. but i have never seen tube amps use them. do you still have a dual plate and load? is metering done for each individual tube? Original Message== Yes, this; /archives//html/Amps/2014-04/msg00099.html (8,972 bytes)
214. [Amps] complicated Bias circuit (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 5 May 2014 01:18:47 +0000 (UTC); Hi builders. Hopefully you all can view this schematic. I'm trying to understand what T2 and associated circuitry do. D17 and D18 seem like a simple bias circuit as SW3 selects between "class C" and; /archives//html/Amps/2014-05/msg00003.html (7,573 bytes)
215. Re: [Amps] complicated Bias circuit (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 5 May 2014 01:49:09 +0000 (UTC); FYI, if it helps any, this goes to a 3cx800A7 amplifier of some sort. Hi builders. Hopefully you all can view this schematic. I'm trying to understand what T2 and associated circuitry do. D17 and D18; /archives//html/Amps/2014-05/msg00004.html (7,426 bytes)
216. Re: [Amps] complicated Bias circuit (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 5 May 2014 02:30:09 +0000 (UTC); Hi Jim, Thanks, that is what I needed to get me going. I couldn't see the exact need for the T2 circuitry since D17 and D18 were still the traditional high power 50W zeners. I would have thought sinc; /archives//html/Amps/2014-05/msg00007.html (10,256 bytes)
217. Re: [Amps] complicated Bias circuit (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 5 May 2014 23:41:21 +0000 (UTC); Thanks Joe, What I meant by complicated is more that I haven't seen a bias circuit like that in any amateur publication. I dug through a few handbooks dating back to 76 and the only circuit close was; /archives//html/Amps/2014-05/msg00011.html (8,685 bytes)
218. [Amps] Difference between 3cx800A7 and 3cx800U7 (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 5 May 2014 23:49:21 +0000 (UTC); Hello builders, I've looked over the sheets for the 3cx800A7 and the 3cx800U7. Besides the obvious mechanical differences, the data sheet for the U7 says the max plate voltage is 1800V with a 2250V r; /archives//html/Amps/2014-05/msg00012.html (7,303 bytes)
219. Re: [Amps] complicated Bias circuit (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Mon, 5 May 2014 23:59:57 +0000 (UTC); Hi Paul, Agreed! But it's in my shack now, while I don't need qsk, I do need TX/RX capability. you should see the inside of the power supply and the RF decks, absolutely gorgeous and stunning constru; /archives//html/Amps/2014-05/msg00013.html (9,237 bytes)
220. Re: [Amps] QEX May/June 2014 amplifier article (score: 1): Author: Paul Decker <kg7hf@comcast.net>; Date: Sat, 17 May 2014 16:30:23 +0000 (UTC); I was feeling bad because I was having trouble digesting the article as well. I read it over a few times since at first I thought it was talking about class E, but after a second read it was about pu; /archives//html/Amps/2014-05/msg00100.html (7,464 bytes)

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