[TenTec] Paragon I PLL

[Gary J FollettDukes HiFi]

I have a full set of Paragon PLL boards that I desoldered carefully (There are actually three, if you include the reference board). The PLL still does not work so I do suspect that there may be a failed component on one of the boards.

I offer the set for $75 if anyone wants to take the time to find the failed part. I feel I did a good enough reflow job that solder connections can be ruled out.

GRY


 (
> On Aug 26, 2016, at 9:58 PM, Bwana Bob <wb2vuf at verizon.net> wrote:
> 
> Yes, there is no other fix. The nuisance part is desoldering and removing the shield covers on the underside of the PLL boards.  Go slowly with the solder reflow work and be patient and you will be rewarded.  I've had to reflow the solder on both of my Paragon PLL boards.  You may be able to localize the problem my tapping on the board.
> 
> If you get a "PLL UNLOCK" display only on certain bands or frequencies, it may be that the VCO for that band (there are 4) needs alignment, but by far, the most common cause for PLL unlock is the soldering.  It seems that Ten Tec did not tin the component leads or board and there was oxide on the leads, which prevented proper solder wetting.
> 
> 73,
> 
> Bob WB2VUF
> 
> 
> On 8/26/2016 8:03 PM, Wade Staggs wrote:
>> *These folks are 100% correct. And Hello Jim. After removing the top case
>> on your rig, you will find a compartment under the board closest to the
>> front and left side of the rig. Inside that metal box/compartment, you will
>> find the Major and Minor PLL Loop Boards. Carefully remove them One at a
>> time. Now with a 30 watt and temperature controlled soldering iron. ( Small
>> Tip ) Reflow/Resolder every connection. be very careful not to create any
>> solder bridges. I personally use one of the boom mounted magnifying glasses
>> with the circular lamp built in, to see exactly what we are soldering. And
>> if you can use just a very little small diameter solder for the reflow
>> without making solder bridges? That's even better. This is a very common
>> problem with the Paragon and the mentioned Major and Minor Loop Boards.
>> Repairing this failure made me a Lot of friends back in the day.  *
>> 
>> On Fri, Aug 26, 2016 at 2:01 PM, <k7mks at comcast.net> wrote:
>> 
>>> In past 2 days my Paragon, after having been turned OFF for several hours
>>> up to overnight, has experienced 2 failures of PLL locking. In each
>>> instance, after turning on the Paragon, i pressed the RESET button and
>>> normal operation for hours, in all respects (mode and band changes) plus
>>> power output, was returned
>>> 
>>> This is a cosmetically excellent radioi with all fllters and a Giehl chip
>>> The "P" word has not entered the picture yet but my comfort zone with PLL's
>>> is zero. Would appreciate helpful comments to help keep this radio in one
>>> piece!
>>> 
>>> Thank you Joe k7mks
>>> 
>>> 
>>> 
>>> _______________________________________________
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>>> TenTec at contesting.com
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>>> 
>> 
>> 
> 
> 
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