On Sun, 2 Jan 2011 14:33:20 EST WD8DSB@aol.com writes:
> Built a W1FB preamp (Aug 1988 QST) for use with my 4.5 square
> shielded loop
> which is located in my shack, and the MC1350 IC gets permanently
> altered
> when I transmit on 160 meters using my 53 foot base loaded
> vertical.
> Wonder if anyone else has experienced this same problem...
Yes! I've had the burn-out problem when I operated with high power.
So, I built a protection device in the box with the preamp and
that took care of the problem. The "Front End Saver" (I think that's
the title/name of the device) was in CQ Mag, Feb 97, pg 32.
Far Circuits may still have the FES PC board.
73,
Charlie, N0TT
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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