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1. [TenTec] Omni VI lock problem (score: 1): Author: Ken Brown <ken.d.brown@hawaiiantel.net>; Date: Sat, 22 Sep 2007 12:55:15 -1000; Hi all, My Omni VI has a cyclical drift problem. It sounds like a PLL drifting away from lock and then being pulled back into lock over and over again. My first guess was that one of the crystals or; /archives//html/TenTec/2007-09/msg00374.html (9,392 bytes)
2. Re: [TenTec] Omni VI lock problem (score: 1): Author: Clark Savage Turner <csturner@kcbx.net>; Date: Sat, 22 Sep 2007 16:13:15 -0700; Hi Ken - I had a similar problem. Needed a new crystal oven. I understand you can buy the TCXO that is a fairly simple replacement, too. Not expensive. Clark WA3JPG __________________________________; /archives//html/TenTec/2007-09/msg00375.html (8,040 bytes)
3. Re: [TenTec] Omni VI lock problem (score: 1): Author: Ken Brown <ken.d.brown@hawaiiantel.net>; Date: Sat, 22 Sep 2007 13:11:21 -1000; Hi Clark, Thanks for the suggestion. I don't hear the 20 MHz TCXO drifting. It is rock solid. Maybe if it's output level drops this problem can occur while the frequency remains stable??? DE N6KB ___; /archives//html/TenTec/2007-09/msg00376.html (8,886 bytes)
4. Re: [TenTec] Omni VI lock problem (score: 1): Author: Clark Savage Turner <csturner@kcbx.net>; Date: Sat, 22 Sep 2007 16:30:48 -0700; Interesting, Ken. I heard my TCXO drift up and down, just a few Hz here and there. Sorry if I didn't pay attention to your post, I just scanned it and recall the "hunting" behavior of the frequency s; /archives//html/TenTec/2007-09/msg00377.html (9,914 bytes)
5. Re: [TenTec] Omni VI lock problem (score: 1): Author: Bill Cotter <n4lg@qx.net>; Date: Sat, 22 Sep 2007 19:39:47 -0400; Ken, I had this problem on 30M where the receiver would 'whoop' once every 30sec or so. I sent the 6+ back to TT to have the problem corrected, along with the 10M birdies and an alignment. When it re; /archives//html/TenTec/2007-09/msg00378.html (10,308 bytes)
6. Re: [TenTec] Omni VI lock problem (score: 1): Author: Ken Brown <ken.d.brown@hawaiiantel.net>; Date: Sat, 22 Sep 2007 14:08:18 -1000; Adjusting C31, the 20 MHz oscillator trimmer, seems to have fixed it. I don't understand why, since even if it were slightly off frequency I would expect the band select xtal oscillators to be locked; /archives//html/TenTec/2007-09/msg00379.html (7,714 bytes)
7. Re: [TenTec] Omni VI lock problem (score: 1): Author: Bill Cotter <n4lg@qx.net>; Date: Sun, 23 Sep 2007 10:16:32 -0400; Ken, My first thought would be that if C31 was too far off, none of the bands would be within range of pll lock. In my case it was the 30M oscillator that 'hunted'. To correct, rig #1 (6+ circa 98) m; /archives//html/TenTec/2007-09/msg00382.html (8,790 bytes)

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