[TenTec] Paragon PLL question

[Stan Jacox]

Hello again
I posted the following question last night and didn't see the message get to
the reflector so I plunged ahead and discovered that both the reference osc.
board and the minor loop board were causing two different problems. The
minor loop board was causing a rapid jitter/flutter of the VCO of a
peak -peak value of 250hz and the reference oscillator board was dropping
out completely at times. After localizing the ref. osc. problem to one area
of the board I removed and replaced all the solder on about 1/3 of the board
and reflowed solder on the remainder. That took care of the intermittent
osc. problem.  The minor loop board was simply stripped off of all excess
solder and resoldered with 2% silver bearing solder.

Now I'm a happy Paragon owner again.

Tnx
Stan KM6XZ


From: Stan Jacox <stan@studio-maint.com>
To: TenTec List <tentec@contesting.com>

>
> Hello List
> I have the common problem of "Out of Lock" intermittently on my Paragon
585.
> I forgot which PLL was usually the cause according to previous posts here.
> Sometimes it is in the form of distortion due to wide phase jitter and
other
> times it's display blanks with the "Out of Lock" warning.  It only happens
> when I am thinking about but not actually transmitting.  This rig seems to
> know when 10 meters is hot, like this morning and when a rare one is
dialed
> in.
> I've got my desoldering station warmed up and I'm ready to rework the
board
> but which board?
>
> Thanks
> 73
> Stan KM6XZ
>

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