[Central-Electronics] 100V crud next to carrier

[Jon Kannegaard]

I’ll try a crystal. That should implicate or exonerate the PTO. I’ll run a few more simple experiments before I pull it out of operating position C and open it up.

Thanks for the suggestion,

Jon


> On May 5, 2023, at 8:37 PM, George Maier via Central-Electronics <central-electronics at mailman.qth.net> wrote:
> 
> Hi Jon:
> Does the “crud”’appear on all bands? If not, it could be mixing crystal for the band you were on, presumably 75 or 40M.  If it’s there on all bands, it could be related to the PTO.  As you said, lots of places to look.
> 73, George - W1LSB
> 
> 
> 
> 
>> On May 5, 2023, at 10:57 PM, Jon Kannegaard <k6jek at comcast.net> wrote:
>> 
>> My 100V has a bunch of crud right next to the carrier, noticeable in LSB and maybe USB but it was LSB I was using. At present, both the limiter and audio filter are out with just jumper plugs filling the holes. 
>> 
>> Do you suppose the filter module might cut that stuff out? I’d have to resurrect it.
>> 
>> Incidentally, not too long ago (this century) I rebuilt the audio phase shift network. I had access to a recently calibrated lab-grade LCR meter, so I tackled it. If I recall correctly ,every cap and resistor was replaced, bridged to the tight spec. Those caps and resistors are new, unlikely to be the source of the crud. But there are plenty of other suspects.
>> 
>> Jon, K6JEK
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