Actually the synthesizer in this radio is pretty simple by synthesizer
standards.
It is also rather ingenious.
I have found that the CPU puts more of these in the parts bin than synthesizer
issues.
But, we all have different experiences. For me, I’d rather wrestle an opponent
I can beat (a PLL synthesizer) than one I cannot (a CPU with proprietary chips
you can no longer get at any price).
73
Gary
> On Dec 10, 2016, at 12:56 PM, Steve Ellington <steven4lq@gmail.com> wrote:
>
> Good luck. PLL problems are the reason so many Omni VI's get sold for
> parts. :*)
>
> On Sat, Dec 10, 2016 at 1:15 PM, Dukes HiFi <dukeshifi@comcast.net> wrote:
>
>> I did find the Omni 5 process that Barry had referenced but this only
>> covers centering of the VCO.
>>
>> I need to do the loop IF alignment.
>>
>> There is a rectifying test point at the output of this stage and I assume
>> that there are adjustments to be made at differing frequencies using the DC
>> voltage developed at this test point in order to get proper gain across the
>> entire required bandpass of the VCO.
>>
>> That’s the process I need.
>>
>> Thanks,
>>
>> Gary
>>
>>
>>> On Dec 10, 2016, at 12:07 PM, Dukes HiFi <dukeshifi@comcast.net> wrote:
>>>
>>> Now that I have repaired the PLL on the 5.5 mHz board of this Omni 6+ I
>> am repairing, I need to align the loop IF amplifier and VCO centering.
>>>
>>> Is there a resource where I can find this process?
>>>
>>> Gary
>>>
>>> W0DVN
>>
>> _______________________________________________
>> TenTec mailing list
>> TenTec@contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|