[TenTec] Paragon overcurrent fault

Sun, 5 Oct 2003 17:49:49 -0400

Teflon has a tendacy to cold flow.  Do not let any teflon insulated wire
rest (touch) against the chasis or anything else metalic or in time it will
cold flow and short out.
73 de Jules  K8JK
----- Original Message -----
From: "David McClafferty" <[email protected]>
To: "Tentec List" <[email protected]>; "Tentec Reflector"
<[email protected]>
Sent: Sunday, October 05, 2003 9:54 AM
Subject: [TenTec] Paragon overcurrent fault


> My friend Fred ,VE1PBX had a problem with his Paragon
> shutting down on overcurrent even in receive. The
> finals were drawing the current but they were not
> defective, they were turned fully on. The bases were
> getting voltage from the driver collector circuit
> because the interstage transformer was shorted. The
> secondary winding, which is wound with teflon wire,
> had a tiny hole in the insulation where it was close
> to the bottom side of the PC board. We have no idea
> what caused the hole. This teflon insulation is very
> tough. Replacing the wire cured the problem. Fred
> wanted me to pass this on in case anyone else had the
> same problem.
>
> Dave, VE1ADH
>
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