[TenTec] RF gain/switch on Corsair

[Dr. Gerald N. Johnson]

On Mon, 2008-12-22 at 13:13 -0600, jim smith wrote:
> Howdy,
> 
> The RF Gain/Power switch on my Corsair shot craps during the ARRL 10m
> contest.  It went in a big way, taking the fuse on the power supply and
> tripping a breaker in the process.
> 
> >From my read of the owner's manual, it appears to be a 10k pot.  I just
> happened to have a 10k pot push/pull on/off in the junque box.  I
> dutifully replaced it, but the RF gain control ain't what it used to be.
> 
> Rather than really "kicking in" at about 10 O'clock [position 4 on the
> dial], it doesn't really do its thing until about 2 0'clock on the dial
> [this is on 40 m].
> 
> Is  that pot really a 10k?  Is it a 10k linear or log?  Have I maybe
> blown something along with the pot?

Its probably originally a reverse log, or your replacement is log the
original was linear. Try tying a 10K resistor from the hot side of the
pot to the wiper, that should invert the taper in a way you are
accustomed to it being.
> 
> Thanks.
> 
> 73, N0OCT
>