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361. Re: [TenTec] Titan 425 Major H/L Voltage drop (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Fri, 03 Dec 2010 10:46:03 -0800; The Titan 425 has two power supplies -- one that supplies 28VDC to run the logic and control circuits, and the 2.7kV supply for the output stage. The dial lights run from the 28VDC supply, so if they; /archives//html/TenTec/2010-12/msg00051.html (9,571 bytes)
362. Re: [TenTec] TITAN 425 PS maintenance (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Fri, 03 Dec 2010 11:00:31 -0800; I am a STRONG believer in "If it an't broke, don't fix it." If something in the P/S later fails and you can't easily replace it, THEN think about that board. At this point though, all the parts that; /archives//html/TenTec/2010-12/msg00052.html (7,602 bytes)
363. Re: [TenTec] Titan 425 Major H/L Voltage drop (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Fri, 03 Dec 2010 12:04:15 -0800; I'd call that VERY unlikely. The soft start circuit, as noted by Jerry, Ron, and me is a far more likely cause. I mentioned the caps because there is also the possibility of a "two problem problem,"; /archives//html/TenTec/2010-12/msg00057.html (8,695 bytes)
364. Re: [TenTec] TITAN 425 PS maintenance (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Fri, 03 Dec 2010 13:04:14 -0800; One thing you would need to consider is what other high voltage capacitors are in the RF deck that might need to be replaced with parts rated for higher voltage. As I understand it, the main reason f; /archives//html/TenTec/2010-12/msg00060.html (9,014 bytes)
365. Re: [TenTec] Titan 425 3CPX800A7 Modification (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Mon, 06 Dec 2010 08:41:14 -0800; Right. The guy who wrote that long article appears to be a schmuck who wants to run illegal power. 3CPX800A7s are a plug and play replacement for 3CX800A7s. They are simply designed to tolerate highe; /archives//html/TenTec/2010-12/msg00147.html (9,468 bytes)
366. Re: [TenTec] Computer Interface (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Mon, 06 Dec 2010 08:49:59 -0800; YES! I ran a simple interface like Hank describes with my Omni V with the N4PY mod, and it worked VERY well. I used it with WriteLog, but it would work with any good logging or control program. All y; /archives//html/TenTec/2010-12/msg00148.html (8,655 bytes)
367. Re: [TenTec] Paragon II RS-232 noise (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Wed, 15 Dec 2010 12:44:10 -0800; Yes, cable shield connection (NOT GROUNDING) is quite important. It MUST go to the shielding enclosure on both ends. DO NOT CONNECT CABLE SHIELDS TO THE SO-CALLED "GROUND" PIN ON THE DB CONNECTOR --; /archives//html/TenTec/2010-12/msg00347.html (8,378 bytes)
368. Re: [TenTec] Titan vac relay (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Thu, 23 Dec 2010 09:06:11 -0800; The good news about maintaining older Ten Tec gear is that you can usually get the parts. It's also generally true that the parts are pretty standard, and easy to find in either industrial or surplus; /archives//html/TenTec/2010-12/msg00485.html (8,892 bytes)
369. Re: [TenTec] Titan vac relay (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Thu, 23 Dec 2010 16:21:36 -0800; You guys seem to be going a bit "round the bend" on this. I wouldn't be so sure that the high price quoted to Rafael had much in the way of export duties in it (if at all). Remember, he said that it; /archives//html/TenTec/2010-12/msg00493.html (7,794 bytes)
370. Re: [TenTec] Titan vac relay (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Thu, 23 Dec 2010 20:03:40 -0800; Round trip air fare from SFO to PJ4 was $765. 73, Jim K9YC _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tente; /archives//html/TenTec/2010-12/msg00496.html (7,260 bytes)
371. Re: [TenTec] Titan vac relay (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Fri, 24 Dec 2010 09:57:56 -0800; As DX trips go, this one was quite inexpensive. My total cost (food, travel, accomodations, fees) was about $1,500. Most DXpeditions can cost upwards of $10K, and the really rare ones can cost a lot; /archives//html/TenTec/2010-12/msg00502.html (8,656 bytes)
372. Re: [TenTec] Titan 425 Amp (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Fri, 24 Dec 2010 17:53:04 -0800; There are schematics on my website that might help when you get to troubleshooting the amp. http://audiosystemsgroup.com/publish.htm Ron's suggestion to start by disconnecting the HV line is a very g; /archives//html/TenTec/2010-12/msg00512.html (8,250 bytes)
373. [TenTec] ARRL Technical Publications (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Tue, 11 Jan 2011 17:07:46 -0800; You are right on, Jerry! I can tell you from direct experience that ARRL HQ is dominated by egos and has FAR less technical expertise than one would like to believe. There is no technical editing of; /archives//html/TenTec/2011-01/msg00279.html (10,212 bytes)
374. Re: [TenTec] ant (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Fri, 14 Jan 2011 11:25:30 -0800; The best tuners I know of are the Ten Tec 229/238 (essentially the same tuners, different appearance to match different vintages of Omni rigs). Yes, it uses a balun to couple to balanced line. So wha; /archives//html/TenTec/2011-01/msg00357.html (8,900 bytes)
375. Re: [TenTec] Battery charger (power supply Hercules II) (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sat, 05 Feb 2011 08:55:03 -0800; I agree. I use a 10A supply to recharge a deep discharge Costco battery that runs my K3 and a few accessories. It's enough for that power level, even during heavy contesting, but I'd want more like 2; /archives//html/TenTec/2011-02/msg00068.html (7,877 bytes)
376. Re: [TenTec] Battery charger (power supply Hercules II) (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Sun, 06 Feb 2011 09:26:24 -0800; That assumes that you transmit 100% of the time, which is certainly not the case. Rather, most of us listen more than we transmit, except, perhaps, during contests. So for CW, a duty cycle on the ord; /archives//html/TenTec/2011-02/msg00103.html (9,608 bytes)
377. Re: [TenTec] KPA 500 (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Wed, 23 Feb 2011 09:49:01 -0800; It's currently in field test. I had one for WPX RTTY, N6XI had one for ARRL DX CW, there's one in the UK, and my neighbor, K6XX has been trying to blow them up for almost a year. I have no inside inf; /archives//html/TenTec/2011-02/msg00464.html (8,644 bytes)
378. Re: [TenTec] KPA 500 (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Wed, 23 Feb 2011 12:48:19 -0800; You mean it didn't have a fancy front panel that added cost without adding useful function? In my experience, The KPA500 has a steel chassis. Elecraft is what Ten Tec used to be -- state of the art r; /archives//html/TenTec/2011-02/msg00470.html (9,929 bytes)
379. Re: [TenTec] KPA-500 (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Thu, 24 Feb 2011 16:46:09 -0800; What makes you say (or think) that? I could have said the same thing about all the Ten Tec gear I've owned (and much of which I still own) -- good solid construction, good value, but NOT a lot of buc; /archives//html/TenTec/2011-02/msg00508.html (7,298 bytes)
380. Re: [TenTec] KPA 500...K9YC (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Thu, 24 Feb 2011 17:07:27 -0800; When did you see and twist this unit? The KPA500 only began pre-production a month ago. Anything you might have seen at a hamfest was an engineering prototype, and being shown for display purposes. A; /archives//html/TenTec/2011-02/msg00509.html (8,784 bytes)

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