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1. [Amps] specs for a UTC S 50 (score: 1): Author: kenw2dtc@comcast.net (kenw2dtc); Date: Fri, 11 Oct 2002 20:19:21 -0400; Mark, My book shows that the S-50 is a plate transformer: primary: 115 volt 50/60 cycles secondary: 3000-2500-0-2500-3000 at 300 ma. 73, Ken W2DTC -- -- Original Message -- From: Mark Foltarz To: amp; /archives//html/Amps/2002-10/msg00112.html (7,401 bytes)
2. [Amps] 3CX3000F7 idle current (score: 1): Author: kenw2dtc@comcast.net (kenw2dtc); Date: Mon, 21 Oct 2002 11:01:32 -0400; Hi, On my grounded grid, cathode driven 3CX3000F7 linear with 4800 volts on the plate my zero signal plate current is 500 mills. Should I be adding a little bias to bring it down a bit? 73, Ken W2DTC; /archives//html/Amps/2002-10/msg00223.html (6,835 bytes)
3. [Amps] 3CX3000F7 idle current (score: 1): Author: kenw2dtc@comcast.net (kenw2dtc); Date: Tue, 22 Oct 2002 10:14:58 -0400; Thanks to all those who responded to my question. 73, Ken W2DTC -- -- StripMime Report -- processed MIME parts -- multipart/alternative text/plain (text body -- kept) text/html --; /archives//html/Amps/2002-10/msg00231.html (6,678 bytes)
4. [Amps] transformer oil (score: 1): Author: kenw2dtc@comcast.net (kenw2dtc); Date: Thu, 26 Sep 2002 12:40:25 -0400; Not sure about cooking oil. I bought a gallon of transformer oil from MFJ. I think the product number was MFJ-21. 73, Ken W2DTC -- but; /archives//html/Amps/2002-09/msg00253.html (7,479 bytes)
5. [Amps] FS: 4 x 3 + socket + etc.... (score: 1): Author: kenw2dtc@comcast.net (kenw2dtc); Date: Fri, 27 Sep 2002 08:31:54 -0400; http://mywebpages.comcast.net/kenw2dtc/for-sale-page.htm -- StripMime Report -- processed MIME parts -- multipart/mixed multipart/alternative text/plain (text body -- kept) text/html application/octe; /archives//html/Amps/2002-09/msg00259.html (6,500 bytes)
6. [Amps] 3 PLATE TRANSFORMERS THAT NEED A NEW HOME. (score: 1): Author: kenw2dtc@comcast.net (kenw2dtc); Date: Mon, 19 Aug 2002 15:04:20 -0400; "GE model 81g465 rated 1.1KVA. 115v in 4620kv@750miliamps center tap." Hi, If the transformer plate tag says 1.1 KVA it's unlikely you could get 750 mills out no matter how you hook it up, do you agr; /archives//html/Amps/2002-08/msg00162.html (7,375 bytes)
7. [Amps] amateur radio demise (score: 1): Author: kenw2dtc@comcast.net (kenw2dtc); Date: Tue, 23 Jul 2002 03:34:27 -0400; digitally, the need for us has diminished and we have been abandoned by our Governments." -- Alex, I think you are quite wrong about the demise of amateur radio. While you are surfing the world on y; /archives//html/Amps/2002-07/msg00445.html (8,292 bytes)
8. [Amps] Early radio transmitter (score: 1): Author: kenw2dtc@comcast.net (Ken Barber); Date: Wed, 26 Jun 2002 14:28:39 -0400; http://www.collinsradio.org/html/30w.html -- StripMime Report -- processed MIME parts -- multipart/mixed multipart/alternative text/plain (text body -- kept) text/html application/octet-stream --; /archives//html/Amps/2002-06/msg00237.html (6,417 bytes)
9. [Amps] PS Theory (cap int res) (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Wed, 3 Sep 2003 12:40:06 -0400; I have a bank of these computer grade caps in series: 2400 mfd at 450 vdc, 2.5 inches in diameter and 4 inches long. It looks like the PSU Designer program shows noticeable ripple if the internal res; /archives//html/Amps/2003-09/msg00031.html (8,152 bytes)
10. [Amps] tubes in parallel (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Wed, 3 Dec 2003 02:57:23 -0500; I want to build a grounded grid amp with two triodes in parallel. Would there be a problem if there were two separate sets of plate chokes and suppressors and glitch resistors and combined the RF out; /archives//html/Amps/2003-12/msg00031.html (6,614 bytes)
11. Re: [Amps] tubes in parallel (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Wed, 3 Dec 2003 15:45:05 -0500; Hi Vic, The reason is laziness: I already have two hand wound plate chokes that are self resonant at the desired frequency and while they are heavy enough to handle a single tube with some reserve th; /archives//html/Amps/2003-12/msg00040.html (7,640 bytes)
12. Re: [Amps] Delay Tube (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Tue, 16 Dec 2003 02:52:07 -0500; Except for the longer delay of the 120 second tube, everything else should be the same. 73, Ken W2DTC Am I correct to assume that a 6NO120T would work as a replacement for the 6NO75T?? Thanks,Don n4d; /archives//html/Amps/2003-12/msg00258.html (7,172 bytes)
13. Re: [Amps] Interesting survey (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Wed, 11 Feb 2004 01:12:34 -0500; George, I'm going to pretend you weren't trolling and answer your question: What they are saying is that when they key the mike, without talking, the wattmeter reads 200 watts and when they talk loud; /archives//html/Amps/2004-02/msg00075.html (9,121 bytes)
14. Re: [Amps] 2x8877 question (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Tue, 30 Mar 2004 06:10:52 -0500; Stan, If I understand your AM setup, you are driving two 8877's with a Viking Valiant transmitter that has three 6146's. The Valiant has the capability of around 600 watts pep on AM phone. Is it poss; /archives//html/Amps/2004-03/msg00347.html (8,492 bytes)
15. [Amps] power supply question (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Sun, 4 Apr 2004 04:41:33 -0400; I've been running a power supply at 4800 volts and am thinking of going to the next tap which will yield 5600 VDC. The capacitive input filter is sixteen 2400 MFD 450 VDC computer grade caps (150 MFD; /archives//html/Amps/2004-04/msg00024.html (6,509 bytes)
16. [Amps] power supply question THANKS ! (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Mon, 5 Apr 2004 02:18:09 -0400; Thanks to all who answered. The email consensus is that there will be no problems at 5600 VDC. The rating is conservative and the low heat equalizing resistors are a plus. 73, Ken W2DTC -- The capaci; /archives//html/Amps/2004-04/msg00030.html (7,600 bytes)
17. [Amps] Reducing blower CFM and noise (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Sun, 11 Apr 2004 00:13:38 -0400; Hi, I have a Dayton pressure blower that puts out 820 CFM with a 3450 RPM 1/3 HP motor. If I substitute a 1725 RPM 1/4 HP motor will the CFM drop in half? Will the roaring sound drop accordingly also; /archives//html/Amps/2004-04/msg00073.html (6,438 bytes)
18. Re: [Amps] Reducing blower CFM and noise (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Sun, 11 Apr 2004 13:31:10 -0400; The pressure drop as well as the noise drop will be exponential. However, if a tube with a large anode cooler is used - such as an 8171 - a 1700-rpm blower will usually do the job, especially for SSB; /archives//html/Amps/2004-04/msg00078.html (7,918 bytes)
19. Re: [Amps] I had thought I'd seen everything (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Sun, 25 Apr 2004 04:59:16 -0400; http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3093349628 " It's a Suburban with a dedicated "25kW" CB amplifier." A few years ago I lost a $10 bet because I thought this kind of power was imposs; /archives//html/Amps/2004-04/msg00184.html (8,119 bytes)
20. Re: [Amps] AL1200 (score: 1): Author: "kenw2dtc" <kenw2dtc@comcast.net>; Date: Wed, 22 Sep 2004 12:17:38 -0400; "Have a friend with an AL1200 that recently stopped transmitting on 80 meters only. Works fine, full output on all other bands" Please ask your friend if he actually tested and got full output on 160; /archives//html/Amps/2004-09/msg00405.html (7,306 bytes)

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