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1. [TenTec] OMNI-VI problem (score: 1): Author: K8mp@aol.com; Date: Sun, 4 Oct 2009 09:12:37 EDT; Anyone seen an OMNI-VI do this? Symptoms: The rig appears to be stuck on the same QRG all the time. The freq display changes when you crank the tuning knob, but it's not actually changing the RX freq; /archives//html/TenTec/2009-10/msg00021.html (7,622 bytes)
2. Re: [TenTec] OMNI-VI problem (score: 1): Author: Alfred Lorona <w6wqc@dslextreme.com>; Date: Sun, 4 Oct 2009 16:18:54 -0700; Look for the easy thing first. Is your lock button pushed in? 73, AL _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/list; /archives//html/TenTec/2009-10/msg00022.html (6,816 bytes)
3. Re: [TenTec] OMNI-VI problem (score: 1): Author: Ken Brown <ken.d.brown@hawaiiantel.net>; Date: Sun, 04 Oct 2009 14:31:50 -1000; Hi Joe, I have not seen the problem you describe. I have perused the local oscillator scheme of the Omni VI enough that I think I can make some good guesses about what is happening. The Omni VI has a; /archives//html/TenTec/2009-10/msg00023.html (10,353 bytes)
4. Re: [TenTec] OMNI-VI problem (score: 1): Author: K8mp@aol.com; Date: Mon, 5 Oct 2009 09:35:30 EDT; Thanks Ken. Sounds like you have gone a round or two with OMNI VI's in the past. I do have a scope so I can check those sigs you mentioned. To make sure we are on the same page: The displayed freq is; /archives//html/TenTec/2009-10/msg00024.html (11,693 bytes)
5. Re: [TenTec] OMNI-VI problem (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>; Date: Mon, 05 Oct 2009 10:18:03 -0600; <SNIP> Actually the synthesizer is up in the 450 to 500 MHz region for better phase noise and then divided down to 5 to 5.5 MHz where its used alone for 80 and 20 and mixed with a crystal for the oth; /archives//html/TenTec/2009-10/msg00028.html (9,089 bytes)
6. Re: [TenTec] OMNI-VI problem (score: 1): Author: OTAKEBI@aol.com; Date: Mon, 5 Oct 2009 13:17:34 EDT; I bet if you check SWR on transmit it will be off scale. I would also get an AM station at times. Check that PLL board and the small board next to it. If I remember they are under the FM board. Do no; /archives//html/TenTec/2009-10/msg00029.html (12,319 bytes)
7. Re: [TenTec] OMNI-VI problem (score: 1): Author: K8mp@aol.com; Date: Mon, 5 Oct 2009 14:58:49 EDT; Thanks for the good info Dan. I have avoided xmiting. Figured I'd toast something. I'm sure the swr is whacko, but I do have a dummy load if I need to key the rig. Since it's messed up in both RX and; /archives//html/TenTec/2009-10/msg00030.html (13,258 bytes)
8. Re: [TenTec] OMNI-VI problem (score: 1): Author: Ken Brown <ken.d.brown@hawaiiantel.net>; Date: Mon, 05 Oct 2009 21:12:24 -1000; Hi Gerry, Actually the synthesizer generates 4.97 to 5.53 MHz as I said. The way it does this is to use a PLL operating at 200 - 220 MHz. The VCO in this PLL is actually a VCXO using a 39.940 MHz cry; /archives//html/TenTec/2009-10/msg00034.html (10,371 bytes)
9. Re: [TenTec] OMNI-VI problem (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>; Date: Tue, 06 Oct 2009 11:11:41 -0600; I thought it was synthesized at a higher frequency for more phase noise reduction by division. But I've not studied an Omni V or VI manual later. I was interested in using one for VHF transverter IF; /archives//html/TenTec/2009-10/msg00038.html (12,006 bytes)
10. Re: [TenTec] OMNI-VI problem (score: 1): Author: K8mp@aol.com; Date: Tue, 6 Oct 2009 16:28:27 EDT; Interesting... "Grabbing at straws", I removed the back-up battery to force a hard reset of the microprocesser and voila, all seems well again. FYI: the battery still reads 3 volts... _______________; /archives//html/TenTec/2009-10/msg00041.html (8,144 bytes)
11. Re: [TenTec] OMNI-VI problem (score: 1): Author: K8mp@aol.com; Date: Tue, 6 Oct 2009 18:31:32 EDT; Spoke too soon. It flaked out after putting it back together. At least it ran for a while, making me think it's an interconnect problem, as you guys suggested. _______________________________________; /archives//html/TenTec/2009-10/msg00047.html (8,218 bytes)
12. Re: [TenTec] OMNI-VI problem (score: 1): Author: K8mp@aol.com; Date: Tue, 6 Oct 2009 18:32:44 EDT; PS--Or a flaky/cold solder joint _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec; /archives//html/TenTec/2009-10/msg00048.html (7,798 bytes)
13. Re: [TenTec] OMNI-VI problem (score: 1): Author: OTAKEBI@aol.com; Date: Tue, 6 Oct 2009 19:37:27 EDT; Thought it would. Check the connectors first. But, I am telling you the problem will be found on the trace side of the PLL boards under the FM board. Good luck, Dan/N4VET In a message dated 10/6/2009; /archives//html/TenTec/2009-10/msg00049.html (8,615 bytes)
14. Re: [TenTec] OMNI-VI problem (score: 1): Author: K8mp@aol.com; Date: Tue, 6 Oct 2009 19:42:05 EDT; Just finished going over it with a fine tooth comb and hot iron. I'll find out shortly. _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesti; /archives//html/TenTec/2009-10/msg00051.html (7,969 bytes)
15. Re: [TenTec] OMNI-VI problem (score: 1): Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>; Date: Tue, 06 Oct 2009 17:45:30 -0600; What's the battery voltage under load (e.g. power off)? When's the last time the battery was replaced? Might be time for a new battery. Might be a problem with the power supply to the microprocessor,; /archives//html/TenTec/2009-10/msg00052.html (9,122 bytes)

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