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Total 99 documents matching your query.

1. [TenTec] Omni VI testing XTAL OSC module outside of radio (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sat, 8 Jul 2017 10:50:54 -1000
My Omni VI is dead, and it seems like it is because the band selecting crystal oscillator is not generating a signal. Voltmeter readings indicate that the board is getting the correct DC supplies , t
/archives//html/TenTec/2017-07/msg00020.html (8,005 bytes)

2. Re: [TenTec] Omni VI testing XTAL OSC module outside of radio (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sat, 8 Jul 2017 16:06:16 -1000
Hi Gary, The crystal oscillator is getting +13.5 vdc and VREG +10 VDC AND band select voltage. Still it does not generate anything, regardless of which band is selected. I am suspecting a semiconduct
/archives//html/TenTec/2017-07/msg00022.html (13,439 bytes)

3. Re: [TenTec] Omni VI testing XTAL OSC module outside of radio (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sat, 8 Jul 2017 16:17:02 -1000
Actually what you said about "each band having its own crystal oscillator" is not entirely correct. There is only one oscillator for band selection, with one of several crystal switched in to select
/archives//html/TenTec/2017-07/msg00023.html (14,497 bytes)

4. [TenTec] Substitute semiconductors for Omni VI XTAL OSC. (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sun, 9 Jul 2017 11:17:05 -1000
The band select crystal oscillator in my Omni VI is not functioning. I am suspecting a failed semiconductor. Q1, Q2, Q3, D25 and D26 are all likely suspects. They are not necessarily readily availabl
/archives//html/TenTec/2017-07/msg00027.html (7,193 bytes)

5. Re: [TenTec] Eagle CAT com port goes dumb on transmit (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Tue, 11 Jul 2017 17:46:51 -1000
Turn tx power down to see if there is a power level that does not cause the problem, just to confirm it really is an RF problem. Try connecting radio directly to dummy load and see if problem goes aw
/archives//html/TenTec/2017-07/msg00031.html (8,677 bytes)

6. Re: [TenTec] Substitute semiconductors for Omni VI XTAL OSC. (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Fri, 14 Jul 2017 11:27:27 -1000
Hi Curt, Checking the voltages on Q1, Q2 and Q3 was definitely the thing to do. Fortunately I have two Omni VI and I could compare the non-functional one with the working one. On the working one the
/archives//html/TenTec/2017-07/msg00042.html (9,850 bytes)

7. [TenTec] Omni VI Rubbery crud on PCB (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sat, 15 Jul 2017 13:32:44 -1000
My Omni VI had some dark brown rubbery stuff on the XTAL osc and BFO printed circuit boards, It is sort of like rubber cement and reminds me of similar stuff I found in Kenwood TS-440s. There is also
/archives//html/TenTec/2017-07/msg00044.html (7,365 bytes)

8. Re: [TenTec] Omni VI Rubbery crud on PCB (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Tue, 18 Jul 2017 07:46:05 -1000
I recommend all who own Omni VI inspect their rigs to see whether they have this stuff on them. If they do remove each board that has it and use tiny tweezers and dentist's picks to remove it. Wash w
/archives//html/TenTec/2017-07/msg00060.html (11,654 bytes)

9. Re: [TenTec] Omni VI filters (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sun, 6 Aug 2017 17:58:17 -1000
It all depends on a lot of things. For one thing there are filter loss compensation jumpers in the Omni VI, but I think those are only for the 9 MHz filters, not for the 6.3 MHz IF filters. The other
/archives//html/TenTec/2017-08/msg00013.html (9,561 bytes)

10. Re: [TenTec] Omni VI filters (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sun, 6 Aug 2017 20:08:35 -1000
It is unclear to me whether you are talking about the NAR or N1, N2 filters in the 9 MHz IF or the Filters in the 6.3 MHz Pass Band Tuning IF. In either case there is something not quite right. If th
/archives//html/TenTec/2017-08/msg00015.html (10,284 bytes)

11. Re: [TenTec] Omni VI filters (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Mon, 7 Aug 2017 08:00:53 -1000
talking about the filters in the 6.3 MHz Band Pass Tuning IF. In that case there are no adjustments to be made. There are "T pad" attenuators hardwired on the board, intended to compensate for diffe
/archives//html/TenTec/2017-08/msg00020.html (13,711 bytes)

12. Re: [TenTec] 20/17 (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sat, 12 Aug 2017 13:52:52 -1000
Those two bands may share the same bandpass filters. I don't know off the top of my head. If they do, I would check to see if the band select control logic is getting to the bandpass filter board(s),
/archives//html/TenTec/2017-08/msg00072.html (8,489 bytes)

13. Re: [TenTec] 20/17 (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sat, 12 Aug 2017 14:17:06 -1000
I Just checked my Omni VI manual, and the Low Pass filters and bandpass filters are not shared that way. In other words 20 meters does not share a lowpass filter with any other band, nor does it shar
/archives//html/TenTec/2017-08/msg00073.html (9,932 bytes)

14. Re: [TenTec] N1 and N2 slots (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sat, 12 Aug 2017 16:37:44 -1000
I cannot give you details about the Inrad modification. I can tell you about Omni VI and Omni VI+. Also, you can have Inrad filters, without the Inrad modification. This all has to do with the 9 MHz
/archives//html/TenTec/2017-08/msg00075.html (9,116 bytes)

15. Re: [TenTec] N1 and N2 slots (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Sat, 12 Aug 2017 18:59:09 -1000
Hi Stan, Older version has two 9 MHz filter slots, but only one is for an optional NAR (what the button is called) filter. More recent Omni VI have three total 9 MHz slots, two being optional N1 and
/archives//html/TenTec/2017-08/msg00078.html (11,145 bytes)

16. Re: [TenTec] Tentec 585. (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Tue, 5 Sep 2017 07:45:38 -1000
Start by opening it up and applying DeOxit to every connector. Unplug, apply DeOxit, replug. Be careful there my be some connectors that can be plugged back in offset by one or more pins, incorrectly
/archives//html/TenTec/2017-09/msg00039.html (7,855 bytes)

17. Re: [TenTec] Omni 6 finals (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Thu, 7 Sep 2017 08:59:27 -1000
Better understand why it happened to prevent it from happening again. Were you using a power supply with no current limiting? Changing the RF power transistors is not hard. You have to be very carefu
/archives//html/TenTec/2017-09/msg00055.html (9,951 bytes)

18. Re: [TenTec] Filters (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Wed, 13 Sep 2017 16:32:59 -1000
If you have not already tried it, I would suggest you reflow all the solder connections on that filter. It may recover. DE N6KB _______________________________________________ TenTec mailing list Ten
/archives//html/TenTec/2017-09/msg00082.html (8,325 bytes)

19. Re: [TenTec] paragon question (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Wed, 11 Oct 2017 07:54:06 -1000
Yes, controlled by a microprocessor and a digital rotary encoder on the main VFO knob. There is no PTO and no mechanical moving parts directly controlling an oscillator. Frequency readout error in Pa
/archives//html/TenTec/2017-10/msg00008.html (11,139 bytes)

20. Re: [TenTec] 12v Pilot Bulb (score: 1)
Author: Ken Brown <kenradiobrown@gmail.com>
Date: Wed, 8 Nov 2017 16:02:28 -1000
Chicago Miniature 756 is a miniature bayonet based bulb rated at 14 V. In 12 to 13 Volt service it will run a little cooler than a 12 V bulb, maybe be a bit dimmer and sort of amber instead of bright
/archives//html/TenTec/2017-11/msg00047.html (9,205 bytes)

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