sweet smell of sucess-hw101

[Stewart Lyon]

Mike,
Remove the 200 ohm balance pot and measure its resistance both end to end
and center-tap to ends. I'll bet that at least one of the connections is
open. I've replaced at least 4 of them in -401's and -101's.  I tore
apart a couple of removed pots and found that the rivet that supposed to
connect the resistive element wasn't.

The replacement I've used is a 10-turn trimpot with the screw out the
top. You can get them from Digikey for less than $2. The wire leads are
usually closer than the old pot but you can bend the leads to fit the
original holes. It doesn't seem to make a difference whether the trimpot
is wirewound or cermet. While you are there, also replace the 240 ohm end
resistors. I have found them way off and drifty with temperature. With
the trimpot, it's easy to balance the carrier down to zero.

Try it -- you'll like it.

73, Stu - W6CUX
Winnetka, CA
ARRL Life Member (and almost an Extra Class!!)


On Sun, 6 Feb 2000 13:51:08 -0500 mike bryce <prosolar at SSSNET.COM>
writes:
> boys and girls--keepers of the green
>
> I've run the carrier null CONTROL all the way into its stop before I
> see any
> carrier drop.
>
> the carrier Capacitor does very little.
>
> any ideas????
> Mike Bryce
> SunLight Energy Systems
> "Electricity at the speed of light"
>

Sponsored by the City of Tempe 

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