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Total 15 documents matching your query.

1. [AMPS] 3CV1500A7 (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Sun, 2 Aug 1998 20:14:19 -0400; After a long search, I have finally acquired a vapor-cooled Alpha PA-70V amplifier. Can anyone tell me how obtainable the 3CV1500A7 tubes are these days in either NOS or good used condition? Thanks a; /archives//html/Amps/1998-08/msg00005.html (6,854 bytes)
2. [AMPS] 3CV1500A7 (score: 1): Author: w4eto@rmii.com (Richard W. Ehrhorn); Date: Mon, 3 Aug 1998 15:00:33 -0600; Greetings Paul... To the best of my recollection, Eimac decided to discontinue making the 3CV1500A7 (actually a 3CX1000A7 with a boiler instead of air fins) some time in the late 70's. ETO had alread; /archives//html/Amps/1998-08/msg00017.html (8,572 bytes)
3. [AMPS] 3CV1500A7 (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Mon, 3 Aug 1998 17:47:10 -0400; Thanks so much for the reply Dick. These tubes are far scarcer than I had envisioned. Nevertheless, I'll begin my pursuit for a spare and hopefully, it won't take me nearly as long as it did just to; /archives//html/Amps/1998-08/msg00019.html (11,003 bytes)
4. [Amps] 3CV1500A7 (score: 1): Author: "Juan Munoz" <tg9ajr@tg9ajr.net>; Date: Tue, 6 Feb 2007 08:43:40 -0600; Hi: A very good friend and my elmer has an Alpha PA-70V and he needs to replace the famous and almost disappear 3CV1500A7. Does anyone knows where we could find one or how this amps can be modify to; /archives//html/Amps/2007-02/msg00073.html (6,941 bytes)
5. Re: [Amps] 3CV1500A7 (score: 1): Author: "Robert B. Bonner" <rbonner@qro.com>; Date: Tue, 6 Feb 2007 08:54:37 -0600; OH too bad, there was a brand new one in the box on eBay last month. BOB DD Hi: A very good friend and my elmer has an Alpha PA-70V and he needs to replace the famous and almost disappear 3CV1500A7.; /archives//html/Amps/2007-02/msg00074.html (7,128 bytes)
6. Re: [Amps] 3CV1500A7 (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Tue, 6 Feb 2007 10:14:35 -0500; Juan, The few new tubes that exist are locked up in our safe-deposit boxes. The 3CV1500A7 is electrically and in most respects, identical to the 3CX1000A7. The only difference is that the CV has a b; /archives//html/Amps/2007-02/msg00075.html (9,378 bytes)
7. Re: [Amps] 3CV1500A7 (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Tue, 06 Feb 2007 10:47:39 -0500; Somewhere I have a very unusual 8877. It has no fins. It came in a surplus pulsed RF amplifier used in a MRI system. The anode fit directly into the tuned plate line (pipe) and some air was blown dow; /archives//html/Amps/2007-02/msg00076.html (10,300 bytes)
8. Re: [Amps] 3CV1500A7 (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Tue, 06 Feb 2007 16:29:01 +0000; Out of interest, what's inside the cooling canister on the tube? Are there any special bits to promote turbulence, or prevent hot spots etc? Steve _______________________________________________ Amps; /archives//html/Amps/2007-02/msg00078.html (6,647 bytes)
9. Re: [Amps] 3CV1500A7 (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Tue, 6 Feb 2007 12:06:25 -0500; The inside of the boiler contains a baffle which, is used to help evenly distribute heat and minimize hot-spot bubbles formed if H2O temperature approaches 100-deg. C. Bubbles effectively form an in; /archives//html/Amps/2007-02/msg00081.html (8,227 bytes)
10. Re: [Amps] 3CV1500A7 (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Tue, 6 Feb 2007 18:23:25 +0100 (CET); increases H2O temperature and thus the thermal process can quickly go out of control.< The book 'Radio Transmitters' by Brown, published by Peter Peregrinus in the early 70s (if you can find a copy a; /archives//html/Amps/2007-02/msg00085.html (7,763 bytes)
11. Re: [Amps] 3CV1500A7 (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Tue, 6 Feb 2007 13:07:15 -0500; Why not let a rebuilder like Econco give it a go and have them quote a price for retro fitting the old boiler onto a new tube? They may have done this before. Mike W2AJI for not the the water amp ___; /archives//html/Amps/2007-02/msg00090.html (13,101 bytes)
12. Re: [Amps] 3CV1500A7 (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Tue, 6 Feb 2007 13:12:01 -0500; Good information, thanks Paul. Mike W2AJI _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2007-02/msg00091.html (7,924 bytes)
13. Re: [Amps] 3CV1500A7 (score: 1): Author: pegasus@mho.net; Date: Tue, 6 Feb 2007 22:28:33 -0700 (MST); Hi Paul... It might make sense to take those spare CVs out of Fort Knox and put filament voltage on them once in a while. The below-mentioned W5GEL had a new spare that he kept handy for some 15 or; /archives//html/Amps/2007-02/msg00110.html (9,812 bytes)
14. Re: [Amps] 3CV1500A7 (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Wed, 7 Feb 2007 07:02:00 -0500; Great points, Dennis. I have often thought about adding a separate HV contactor relay to both Alpha amps for the purpose of applying HV at some reasonable time after lighting filaments. My gut has n; /archives//html/Amps/2007-02/msg00114.html (8,732 bytes)
15. Re: [Amps] 3CV1500A7 (score: 1): Author: pegasus@mho.net; Date: Wed, 7 Feb 2007 09:59:51 -0700 (MST); Hello Paul.. There could be two schools of thought here. There could be some danger to the filament as voltages are rising, cathode isn't fully hot yet, maybe the grid isn't sufficiently negative ye; /archives//html/Amps/2007-02/msg00121.html (9,614 bytes)

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