On 22 Apr 2003 at 19:50, Bwana Bob wrote:
> The PLL solder issue was caused by poor workmanship on the PLL boards,
> mostly due to cold solder joints. The symptom is intermittent "PLL out
> of Lock" indications on the display. The fix was to reflow all the
> solder connections on the PLL boards.
I don't know about any of the others but the failures I had
here were clearly not cold solder joints. I examined the
boards under a microscope and saw fractured solder joints.
Both the PC board and component lead were well wetted with
solder, but the solder had actually fractured like a metal
fatigue failure. A friend of mine who also has a Paragon and
who had the failure occure twice, decided the same thing and
attributed it to thermal cycling. So he leaves his Paragon
turned on 24/7 and has no futher failures. I still cycle mine
on and off and have had no further failures since resoldering
Strange thing but easily fixed.
73 de Lee, WA3FIY--
73 de Lee, WA3FIY