[TenTec] Omni VI Frequency Adjustment

[Rick W]

Thanks Ken.  It was getting late and the flaky C31 really had me.  I finally trusted the schematic and my instincts and replaced C31 then did the alignment.

All is now working as it should and pretty close to WWV.  

Unfortunately, I didn't find the Wiki document until it was pointed out to me today.  That would have made my life much easier - hi!


73,
Rick
VE7TK

Website: http://www.ve7tk.com



>________________________________
> From: Ken Brown <ken.d.brown at hawaiiantel.net>
>To: Rick W <ve7tk at yahoo.ca>; Discussion of Ten-Tec Equipment <tentec at contesting.com> 
>Sent: Friday, December 28, 2012 12:23:52 PM
>Subject: Re: [TenTec] Omni VI Frequency Adjustment
> 
>The Omni VI has a 20 MHz reference oscillator (which is divided down to 10 MHz) to which the VFO and the band switching crystal oscillators are locked. The BFO crystal oscillator is not locked to anything. You can have the 20 MHz reference dead on frequency and still be off frequency if the BFO is not adjusted correctly.
>
>DE N6KB
>> 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!
>> 
>>  
>>>  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? 
>>>    
>> 
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