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1. [Amps] T-T Titan 425 Q's (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Thu, 2 Dec 2010 12:57:51 -0500; Amp newbie here. I recently came into a Titan 425 as part of a larger purchase. I kept a few items, sold off the rest, and have less than $200 invested in the amp, a MFJ 259 analyzer and an Astron 50; /archives//html/Amps/2010-12/msg00008.html (7,842 bytes)
2. [Amps] T-T Titan 425 blower maintenance? (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Wed, 2 Mar 2011 12:38:31 -0500; My recently acquired Titan 425 came to me with no low speed fan, high speed worked fine. Got into the power supply and found one leed of the buck winding broken off inside the plug. Fixed that, and w; /archives//html/Amps/2011-03/msg00020.html (8,372 bytes)
3. [Amps] T-T Titan with Pro III Question (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Thu, 26 May 2011 12:02:36 -0400; Hi all, Anyone using a Titan 425 with a Pro III? Is it necessary to use a keying buffer between the rig & amp? Tnx & 73, Bob, N2oam _______________________________________________ Amps mailing list A; /archives//html/Amps/2011-05/msg00229.html (8,306 bytes)
4. [Amps] Alpha 86 or Ten Tec Titan 425.....and why?? (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Sat, 4 Jun 2011 20:09:49 -0400; Hi all, I'm slowly gathering what I need to put together an AM station. I have a T-T Titan 425. Went to a small Ham fest today & swerved into a CLEAN Alpha 86 for a price I couldn't pass up. Never kn; /archives//html/Amps/2011-06/msg00042.html (10,214 bytes)
5. [Amps] EIMAC SK-516 (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Mon, 4 Jul 2011 13:35:35 -0400; Hi all, Shack cleaning.....I have f/s an Eimac SK-516 chimney for the 3-1000. Perfect, no chips, cracks, etc. Appears to be unused. $60 plus shipping. Tnx & 73 Happy Fourth Of July Bob N2oam ________; /archives//html/Amps/2011-07/msg00031.html (6,428 bytes)
6. [Amps] NOS 3CX400U7 (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Thu, 14 Jul 2011 16:34:44 -0400; Hi All, Shack cleaning and found a NOS EIMAC 3CX400U7 Triode. A 3CX800A7 would have been a nice find, but I have no use for this one. Anyone interested in this tube? 73 de bob, N2oam ________________; /archives//html/Amps/2011-07/msg00164.html (7,553 bytes)
7. [Amps] 8874's (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Sun, 6 May 2012 21:53:42 -0400; Hi All, I recently picked up a small VHF Hi band (166.xxx Mhz) transmitter from the late 70's. In as-new condition, inside & out and over built like it was designed for the military. The owner though; /archives//html/Amps/2012-05/msg00226.html (9,200 bytes)
8. Re: [Amps] Input voltage on HV transformer (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Tue, 12 Jun 2012 10:05:11 -0400; Something else to keep in mind is core saturation. When this happens, primary current draw will rise very quickly. 73, bob N2oam _______________________________________________ Amps mailing list Amps; /archives//html/Amps/2012-06/msg00071.html (8,275 bytes)
9. [Amps] Speaking of 8874's............ (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Wed, 13 Jun 2012 13:09:37 -0400; I have a pair for sale, EIMAC, Tested at Alpha. The date codes are 7634 and 7702. Will include report from ALPHA. S/N H6DGxxxx, P in= 11 Watts, P out= 380 Watts, Ip=350 ma, Ig=20 ma. S/N M6JDxxxx,P i; /archives//html/Amps/2012-06/msg00091.html (8,535 bytes)
10. Re: [Amps] Ten Tec Titan 425 Fuses Blew (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Tue, 19 Feb 2013 15:03:20 -0500; Hi Mark, I had one of these a while back....nice amp! If you short pin 9 (Orange wire) and pin 2 (White/Black wire) you can energize the p/s, if it has the cover attached. The power supply has its ow; /archives//html/Amps/2013-02/msg00143.html (9,119 bytes)
11. [Amps] SB-200 Repair? (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Fri, 12 Apr 2013 09:50:11 -0400; Picked up an SB-200 amp at a recent hamfest.......I already have an Alpha 86, but the guy was only asking $40. Good cosmetics, and a once over top to bottom shows nothing zorched. Removed the tubes,; /archives//html/Amps/2013-04/msg00082.html (6,900 bytes)
12. [Amps] Command Technologies VHF 1200 (score: 1): Author: "Bob Arenella" <rja12@comcast.net>; Date: Tue, 14 May 2013 12:47:08 -0400; Hi all, Found one of these at a tiny fest in upstate, NY.......real cheap, but it has a problem. The owner told me it trips whenever drive is applied. I'm thinking it could be something north of the; /archives//html/Amps/2013-05/msg00154.html (8,229 bytes)
13. [Amps] ETO ALPHA 85 Amp?? (score: 1): Author: Robert Arenella <rja12@comcast.net>; Date: Wed, 24 Jul 2013 08:59:25 -0400; Hi all, I've been shack cleaning and came acress a bunch of old ETO / Alpha literature, brochures, ad slicks, dealer price sheets, etc. Among them was an ad introducing the "ALPHA 85" Amplifier. Anyo; /archives//html/Amps/2013-07/msg00063.html (7,256 bytes)
14. [Amps] Command Technologies VHF 1200 Six Meter Amp F/s (score: 1): Author: Robert Arenella <rja12@comcast.net>; Date: Fri, 14 Mar 2014 18:10:30 -0400; I have f/s a COMMAND TECHNOLOGIES VHF 1200 Six Meter amplifier. Uses a single EIMAC 3CPX800A7 triode. The amp was manufactured in 12/2007 and has seen little use. Cosmetically, an easy 9.5 out of 10; /archives//html/Amps/2014-03/msg00073.html (9,755 bytes)
15. Re: [Amps] Command Technologies VHF 1200 Six Meter Amp F/s (score: 1): Author: Robert Arenella <rja12@comcast.net>; Date: Fri, 14 Mar 2014 18:16:53 -0400; Fingers working faster than brain....The price is $1700. Bob, N2OAM On 3/14/2014 6:10 PM, Robert Arenella wrote: I have f/s a COMMAND TECHNOLOGIES VHF 1200 Six Meter amplifier. Uses a single EIMAC 3C; /archives//html/Amps/2014-03/msg00075.html (10,157 bytes)
16. [Amps] Alpha 86 parts (score: 1): Author: Robert Arenella <rja12@comcast.net>; Date: Sat, 23 May 2015 16:11:51 -0400; Hi all, Have an Alpha 86 that needs some help. Need the reduction drive for the Tune control. Mine is getting really sloppy. Next on my wish list is a T/R board with good Rx & Tx pin diodes. Anyone d; /archives//html/Amps/2015-05/msg00173.html (6,686 bytes)
17. Re: [Amps] HV transformer and Variac (score: 1): Author: Robert Arenella <rja12@comcast.net>; Date: Wed, 22 Jul 2015 11:02:52 -0400; is... on the pole pigs, the primary is the 7200 vac winding.... which is called the primary. The primary always goes on the inside of the core..with the secondary wound on top. Sec of course is the; /archives//html/Amps/2015-07/msg00092.html (9,836 bytes)
18. Re: [Amps] TV-7 D/U calibration around New England? (score: 1): Author: Robert Arenella <rja12@comcast.net>; Date: Sat, 5 Dec 2015 11:37:39 -0500; My advise would be to box it up & send it to Dan Nelson, djn@ieee.org He is a well known TV-7 guru. I sent my TV-7D/U to him several years ago and it's been working fine ever since. He does excellent; /archives//html/Amps/2015-12/msg00026.html (9,202 bytes)
19. Re: [Amps] Alpha 87a Low receive (score: 1): Author: Robert Arenella <rja12@comcast.net>; Date: Mon, 13 Jun 2016 10:10:04 -0400; My Alpha 86 had an Rx fuse and pin diode T/R switching. If that fuse popped, my amp had exactly the same symptoms exhibited by your 87A. I had a pin diode failure that took out the PA's in my flex 50; /archives//html/Amps/2016-06/msg00037.html (8,453 bytes)
20. Re: [Amps] Alpha 87a Low receive (score: 1): Author: Robert Arenella <rja12@comcast.net>; Date: Tue, 14 Jun 2016 01:03:02 -0400; I'll stick with my statement that pin diodes were / are the Achilles Heel of all the Alpha Amps that used them, especially the 86. If they were so reliable, why did Alpha design & build a replacement; /archives//html/Amps/2016-06/msg00046.html (8,927 bytes)

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