Thanks Markus.
I did this late last night and found C31 was really flaky. Of course this is
the only component on the logic board schematic without a component value.
Anyway, I removed the 20 cent plastic trim cap and replaced it with a 75 cent
ceramic trim cap and all is well. (Getting the logic board out is quite a bit
of work there are close to a zillion different plugs - hi.) Adjusting
the frequency was then fairly easy and the rig is now pretty close to WWV and
stable!
Thanks again!
73,
Rick
VE7TK
Website: http://www.ve7tk.com
>________________________________
> From: Markus Hansen <mkve7ca@gmail.com>
>To: Rick W <ve7tk@yahoo.ca>; Discussion of Ten-Tec Equipment
><tentec@contesting.com>
>Sent: Friday, December 28, 2012 10:45:09 AM
>Subject: Re: [TenTec] Omni VI Frequency Adjustment
>
>
>Hi Rick:
>
>
>Just go to the following URL and you will find the procedure to calibrate your
>Omni VI:
>
>
>http://tentecwiki.org/doku.php?id=563calibrate
>
>
>Worked for me a year ago when I purchased a Omni VI which was also off freq.
> Great radio for a back up.
>
>
>73
>
>
>Markus VE7CA
>WEB: ve7ca.net
>
>
>
>
>On 2012-12-27, at 9:51 PM, Rick W <ve7tk@yahoo.ca> wrote:
>
>Well after further examination this is NOT where I need to be - hi. It looks
>like that is the locking crystal for all the "logic" - duh!
>>
>>More serious examination is in order!
>>
>>73,
>>Rick
>>VE7TK
>>
>>Website: http://www.ve7tk.com
>>
>>
>>
>>
>>________________________________
>>>From: Rick W <ve7tk@yahoo.ca>
>>>To: Ten-Tec Reflector <tentec@contesting.com>
>>>Sent: Thursday, December 27, 2012 4:45:03 PM
>>>Subject: Omni VI Frequency Adjustment
>>>
>>>
>>>I have recently acquired and Omni VI. The rig has seen little use in the
>>>last 10 years but it is working VERY well with a minor exception. The rig
>>>is slightly off frequency (about 150 Hz) - even after a significant warm-up.
>>>
>>>
>>>Looking at the schematic, I have found the crystal oven on the Logic Board
>>>(81606). It looks like the crystal frequency can be tweaked with C31. This
>>>is an early O-6 and it has the crystal oven.
>>>
>>>
>>>Other than C31, are there any other adjustments I should be considering?
>>>
>>>
>>>Thanks.
>>>
>>>73,
>>>Rick
>>>VE7TK
>>>
>>>Website: http://www.ve7tk.com
>>>
>>>
>>>_______________________________________________
>>TenTec mailing list
>>TenTec@contesting.com
>>http://lists.contesting.com/mailman/listinfo/tentec
>>
>
>
>
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