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321. Re: [Amps] EIMAC (8877 TYPE) (score: 1): Author: Gudguyham@aol.com; Date: Sun, 21 Jan 2007 07:12:24 EST; the fact you have to be careful running a 3-500Z on 50MHz. What we get away at on HF just doesn't fly up there unless you have a lot of dumb luck, and it basically will ruin the amp for any other use; /archives//html/Amps/2007-01/msg00208.html (9,879 bytes)
322. Re: [Amps] EIMAC (8877 TYPE) (score: 1): Author: Gudguyham@aol.com; Date: Sun, 21 Jan 2007 07:18:09 EST; Here Here! Lou W1QJ helped me out with my non working SB1000 conversion and got it going for me without hesitation. I met him at the HVCDX summer party and he really was very knowledgeable on on thes; /archives//html/Amps/2007-01/msg00209.html (7,948 bytes)
323. [Amps] 3-500Z on 6 meters (score: 1): Author: Gudguyham@aol.com; Date: Sun, 21 Jan 2007 12:01:33 EST; Here is a grab from the Eimac data sheet at the Eimac website. seems to me 6 meters is covered nicely by this tube. RADIO FREQUENCY LINEAR AMPLIFIER CATHODE DRIVEN (Frequencies to 110 MHz) Class AB2; /archives//html/Amps/2007-01/msg00215.html (6,399 bytes)
324. Re: [Amps] 3-500Z on 6 meters (score: 1): Author: Gudguyham@aol.com; Date: Sun, 21 Jan 2007 18:28:33 EST; Lou, Just because a single tube will operate at full ratings under controlled conditions to a certain frequency doesn't mean it will work in any layout to that frequency. It also does not mean it is; /archives//html/Amps/2007-01/msg00220.html (7,838 bytes)
325. Re: [Amps] EIMAC (8877 TYPE) (score: 1): Author: Gudguyham@aol.com; Date: Sun, 21 Jan 2007 18:30:42 EST; It took me a long time to "let go" of my old 4-1000`s(HF ) and move on to newer ceramic tubes...I`ll never look back but the old guys did have a cool glow! 73,Jim K7RDX.. Jim, I found that out early; /archives//html/Amps/2007-01/msg00221.html (7,877 bytes)
326. Re: [Amps] 3CX1500A7 versus 3CPX1500 TSPA (score: 1): Author: Gudguyham@aol.com; Date: Mon, 22 Jan 2007 23:44:48 EST; Reid Brandon at Eimac once sent me an email saying that basically the pulsed tubes could be used in place of the non-pulsed ones in amateur applications. Yes this is true and the basis for my offerin; /archives//html/Amps/2007-01/msg00230.html (7,281 bytes)
327. Re: [Amps] 3CX1500A7 versus 3CPX1500 TSPA (score: 1): Author: Gudguyham@aol.com; Date: Tue, 23 Jan 2007 18:51:26 EST; What's stuck up your ass Kirkby? The differences between all versions of the tube was covered at least twenty times here in the last week. Were you on vacation? Worthy Exchequer please add Lou's 3CPX; /archives//html/Amps/2007-01/msg00240.html (8,147 bytes)
328. Re: [Amps] 813 Fil Xformer (score: 1): Author: Gudguyham@aol.com; Date: Wed, 24 Jan 2007 13:32:28 EST; Steve: Another approach is to wire the two filaments in series (the TL-922 does this I believe). Then you could use 24 volt xformer drawing current equal to one tube. Put a resistor in the primary le; /archives//html/Amps/2007-01/msg00248.html (7,598 bytes)
329. [Amps] SELL: Eimac 3CPX1500A7 (YC-257) (score: 1): Author: Gudguyham@aol.com; Date: Sat, 27 Jan 2007 14:40:31 EST; Offering a low hour late date coded industrial 3CPX1500A7 (YC-257). Fulled tested and guaranteed. Tested in my AMERITRON AL-1500. No issues. $450.00 shipped CONUS. Thanks Lou ________________________; /archives//html/Amps/2007-01/msg00267.html (6,409 bytes)
330. Re: [Amps] Bad tubes from ebay, update (score: 1): Author: Gudguyham@aol.com; Date: Sat, 27 Jan 2007 19:08:28 EST; I'm not sure I'll ever want to take a chance on something like this happening again. I much prefer to buy tubes from someone close by so that I can strap on my .45 and personally carry the tube back; /archives//html/Amps/2007-01/msg00274.html (7,729 bytes)
331. Re: [Amps] Bad tubes from ebay, update (score: 1): Author: Gudguyham@aol.com; Date: Sat, 27 Jan 2007 19:12:50 EST; Russian tubes are really great for what they cost...American tubes cost more but you get much more...73,Jim K7RDX... Jim, You're so right. With all things being equal here is what I discovered. An 88; /archives//html/Amps/2007-01/msg00275.html (7,814 bytes)
332. Re: [Amps] Bad tubes from ebay, update (score: 1): Author: Gudguyham@aol.com; Date: Sat, 27 Jan 2007 19:26:30 EST; Not only is it unprofessional to "STICK" another guy with a bad tube, but it will get you a very bad reputation quickly. I learned this basic philosophy from Tom Bruckner who he and I had traded on m; /archives//html/Amps/2007-01/msg00276.html (8,042 bytes)
333. [Amps] GS-35B vs 8877 (score: 1): Author: Gudguyham@aol.com; Date: Sun, 28 Jan 2007 10:16:44 EST; The other day Larry brought up the subject of the GS-35B tube. Just prior to his posting I offered up a late date coded fully tested full output 3CPX1500A7 with my usual guarantee of satisfaction to; /archives//html/Amps/2007-01/msg00284.html (7,861 bytes)
334. [Amps] 3CX1500A7 VS 3CPX1500A7 (score: 1): Author: Gudguyham@aol.com; Date: Sun, 28 Jan 2007 12:26:03 EST; Since I had some time here Sunday morning I did some looking into the matter of "filament voltage" concerning these 2 tubes. This was an issue that someone had brought up. Here is what I found, a maj; /archives//html/Amps/2007-01/msg00287.html (7,409 bytes)
335. Re: [Amps] Filament voltages (score: 1): Author: Gudguyham@aol.com; Date: Sun, 28 Jan 2007 14:30:27 EST; In all the years I've been doing this the single most common loss of emission I have seen in 3CX800A7's and 3CX1500A7's has been where the user reduced filament voltage or drew current from the tube; /archives//html/Amps/2007-01/msg00294.html (7,798 bytes)
336. Re: [Amps] 8877 Longetivity (score: 1): Author: Gudguyham@aol.com; Date: Mon, 29 Jan 2007 11:22:00 EST; while failures caused by thermal cycling, gas, and element shorts account for nearly all failures. And in the case of 8877 and 3CX800 tubes, how about operator error? ________________________________; /archives//html/Amps/2007-01/msg00316.html (7,578 bytes)
337. Re: [Amps] 8877 Longetivity (score: 1): Author: Gudguyham@aol.com; Date: Mon, 29 Jan 2007 16:17:37 EST; 73, George T. Daughters, K6GT George, that IS a word in the Bronx dictionary. Lou _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mai; /archives//html/Amps/2007-01/msg00325.html (7,602 bytes)
338. Re: [Amps] Looking for 3-500Z 6 m amp info (score: 1): Author: Gudguyham@aol.com; Date: Mon, 5 Feb 2007 16:19:15 EST; a Swan Mark 6b amp on the Bama site, but the quality was so poor, the parts values were unreadable. Anyone have a schematic they can scan and email me please? Thanks, John KG6I The Swan Mark VI B 6 m; /archives//html/Amps/2007-02/msg00060.html (7,691 bytes)
339. Re: [Amps] Looking for 3-500Z 6 m amp info (score: 1): Author: Gudguyham@aol.com; Date: Mon, 5 Feb 2007 16:22:20 EST; With Sb220 amps selling for over $900.00 today, in un-known conditionon on ebay. Why ruin one , just make a 6 meter amp from scratch. Anyone who pays $900.00 for an Sb-220 is crazy. E-bay is NOT the; /archives//html/Amps/2007-02/msg00061.html (7,561 bytes)
340. [Amps] cooling tubes (score: 1): Author: Gudguyham@aol.com; Date: Tue, 6 Feb 2007 13:25:24 EST; Nice thread on the vapor cooled Eimac tube, but I have an experience I'd like to share and see if anyone can comment. Some time ago I had occasion to work on an Alpha 374 amp. This amp has a pair of; /archives//html/Amps/2007-02/msg00092.html (7,280 bytes)

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