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1. [TenTec] Solving PTO drift (score: 1): Author: Andrew Moore <andrew.nv1b@gmail.com>; Date: Sun, 4 Sep 2011 09:02:14 -0400; Before I start trying to isolate the source of my Corsair II's PTO drift, I wonder if anyone has suggestions about possible causes. I'm making a couple assumptions: 1) the drift is due to temperature; /archives//html/TenTec/2011-09/msg00053.html (8,302 bytes)
2. Re: [TenTec] Solving PTO drift (score: 1): Author: "Jerry Haigwood" <jerry@w5jh.net>; Date: Sun, 4 Sep 2011 08:30:39 -0500; Andrew, You don't need a scope but you will need a frequency counter. You can determine the drift is coming from the PTO by hooking a frequency counter up to the output of the PTO and monitoring the; /archives//html/TenTec/2011-09/msg00054.html (10,436 bytes)
3. Re: [TenTec] Solving PTO drift (score: 1): Author: Andrew Moore <andrew.nv1b@gmail.com>; Date: Sun, 4 Sep 2011 09:40:31 -0400; Thanks Jerry - very helpful. The drift isn't so much a steady increase or decrease over extended time, but rather, both up and down frequency variation by +/- 100 Hz or so, within a span of several s; /archives//html/TenTec/2011-09/msg00055.html (11,859 bytes)
4. Re: [TenTec] Solving PTO drift (score: 1): Author: Michael Wilke <wb4aql@gmail.com>; Date: Sun, 4 Sep 2011 11:50:00 -0400; Andrew, I have had the same problem with my Omni-A. I`ve come to suspect that the problem is more mechanical than electrical and may have to do with leaving the PTO sitting on one portion of the band; /archives//html/TenTec/2011-09/msg00056.html (13,772 bytes)
5. Re: [TenTec] Solving PTO drift (score: 1): Author: "Vic Klein" <vhklein@ptd.net>; Date: Mon, 5 Sep 2011 06:07:59 -0400; I think that some drift is just in the nature of analog PTO circuits. I recall trying to get my old Triton compensated to reduce the slight drift that occurred during use. Many folks have had good re; /archives//html/TenTec/2011-09/msg00058.html (9,726 bytes)
6. Re: [TenTec] Solving PTO drift (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Mon, 05 Sep 2011 11:10:03 +0100; That sounds much more like a mechanical issue. I had something very similar and decided it was time for a PTO re-build; that cured it! 73, Steve G3TXQ _______________________________________________; /archives//html/TenTec/2011-09/msg00059.html (8,295 bytes)
7. Re: [TenTec] Solving PTO drift (score: 1): Author: "Mike Hyder -N4NT-" <Mike_N4NT@charter.net>; Date: Mon, 5 Sep 2011 08:16:19 -0400; Yep, sounds like gummy grease in the PTO. Typically I've not needed any new parts for the PTO, just to clean out the old grease and replace with new. I suggest a synthetic grease, as petroleum-based; /archives//html/TenTec/2011-09/msg00060.html (9,567 bytes)
8. Re: [TenTec] Solving PTO drift (score: 1): Author: "Paul Christensen" <w9ac@arrl.net>; Date: Mon, 5 Sep 2011 08:26:25 -0400; Mike and all... I've been looking for a synthetic PTO grease, but everything I've tried is too "sticky." What I would like is a synthetic equivalent to the viscosity of Lubriplate 105. I've been usin; /archives//html/TenTec/2011-09/msg00061.html (10,550 bytes)
9. Re: [TenTec] Solving PTO drift (score: 1): Author: "Charles P. Steinmetz" <charles_steinmetz@lavabit.com>; Date: Mon, 05 Sep 2011 13:45:44 -0400; Try DuPont Krytox 203. I doubt it'll ever have to be relubricated again. Best regards, Charles _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.c; /archives//html/TenTec/2011-09/msg00062.html (8,783 bytes)
10. Re: [TenTec] Solving PTO drift (score: 1): Author: "Charles P. Steinmetz" <charles_steinmetz@lavabit.com>; Date: Mon, 05 Sep 2011 13:49:58 -0400; DuPont Krytox GPL-203, to give its full name. _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec; /archives//html/TenTec/2011-09/msg00063.html (8,752 bytes)
11. Re: [TenTec] Solving PTO drift (score: 1): Author: Wayne Dial <w8aju_wdial@att.net>; Date: Mon, 5 Sep 2011 12:26:31 -0700 (PDT); Charles, I use a green grease made by Phil Wood & Co. It is a bike grease made for ball and roller bearings. The 3 oz container will last you a life time. Find it @ philwood.com Wayne Try DuPont Kryt; /archives//html/TenTec/2011-09/msg00064.html (9,364 bytes)
12. Re: [TenTec] Solving PTO drift (score: 1): Author: "Dave Brown" <k8ax@wowway.com>; Date: Mon, 5 Sep 2011 16:35:19 -0400; I too have a tube of this grease and have been using it for about 20 years, mostly for bike applications (Wayne, my tube is about half used up after that 20 years). I believe it would be a good choic; /archives//html/TenTec/2011-09/msg00065.html (10,692 bytes)
13. Re: [TenTec] Solving PTO drift (score: 1): Author: Steve Berg <wa9jml@tbc.net>; Date: Mon, 05 Sep 2011 21:05:21 -0500; I had the factory rebuild both PTOs in my Corsair II and the external VFO last year. The one in the rig has settled down, but the one in the external VFO is acting up. It is still stiff, and has a lo; /archives//html/TenTec/2011-09/msg00068.html (8,897 bytes)
14. Re: [TenTec] Solving PTO drift (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Tue, 06 Sep 2011 08:45:25 +0100; Steve, I think I've done 4 re-builds now. On each one I've needed to carefully select the number of washers which space off the plastic spring housing at the back of the PTO; they determine how much; /archives//html/TenTec/2011-09/msg00071.html (10,284 bytes)
15. Re: [TenTec] Solving PTO drift (score: 1): Author: "Charles P. Steinmetz" <charles_steinmetz@lavabit.com>; Date: Tue, 06 Sep 2011 04:46:44 -0400; I'm familiar with it -- my bike shop stocks both it and Krytox (but not the GPL-203 -- GPL-206 and -226, which are thicker, about the same as the Phil Wood grease). The Wood & Co. is great grease, bu; /archives//html/TenTec/2011-09/msg00072.html (9,522 bytes)
16. Re: [TenTec] Solving PTO drift (score: 1): Author: Bwana Bob <wb2vuf@verizon.net>; Date: Tue, 06 Sep 2011 21:07:23 -0400; Andrew: It could be the BFO crystal or associated trimmer caps on Double Sideband Generator Board, but most likely it is the PTO itself. Your best bet is to tinker with the value of C9 on the foil si; /archives//html/TenTec/2011-09/msg00091.html (10,731 bytes)
17. Re: [TenTec] Solving PTO drift (score: 1): Author: Bwana Bob <wb2vuf@verizon.net>; Date: Tue, 06 Sep 2011 21:10:16 -0400; Andrew: That sounds more like frequency jumps, not drift. In that case I would look for a cold solder joint or get a PTO rebuild kit from Ten Tec. 73, Bob WB2VUF _____________________________________; /archives//html/TenTec/2011-09/msg00092.html (14,765 bytes)
18. Re: [TenTec] Solving PTO drift (score: 1): Author: Andrew Moore <andrew.nv1b@gmail.com>; Date: Tue, 6 Sep 2011 21:43:39 -0400; Bob, you are correct - I should clarify this is more of a jump than a steady drift. It wavers slowly, both plus and minus around the desired frequency. A fan blowing ambient air into the holes in the; /archives//html/TenTec/2011-09/msg00093.html (9,646 bytes)
19. Re: [TenTec] Solving PTO drift (score: 1): Author: "Phil Chambley, Sr." <k4dpk@comcast.net>; Date: Tue, 6 Sep 2011 22:47:17 -0400; Andrew.... It's important that you accurately identify and characterize your PTO's behavior, to have a hope of correcting it. The approaches to "drift" and "jump" in frequency are completely differen; /archives//html/TenTec/2011-09/msg00096.html (11,670 bytes)

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