[TenTec] Omni VI Frequency Adjustment

[Rick W]

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 at gmail.com>
>To: Rick W <ve7tk at yahoo.ca>; Discussion of Ten-Tec Equipment <tentec at 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 at 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 at yahoo.ca>
>>>To: Ten-Tec Reflector <tentec at 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 at contesting.com
>>http://lists.contesting.com/mailman/listinfo/tentec
>>
>
>
>