SV: [TenTec] Paragon overcurrent fault

Tue, 7 Oct 2003 12:11:50 +0200

Jules,
considering the cold flow tendency --- is there a viable alternative to =
teflon insulation?
With good heat resistance....

lars
[email protected]

-----Ursprungligt meddelande-----
Fr=E5n: Jules [mailto:[email protected]]
Skickat: den 5 oktober 2003 23:50
Till: [email protected]
=C4mne: Re: [TenTec] Paragon overcurrent fault

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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