[Collins] 75S3 S-Meter Problem

[Al Parker]

Hi Bill,
	I don't have my skem close by, but I've just been thru this on 2 
75S-1's.  There is a zero adj. on the top of the chassis, with a series 
resistor to gnd.  It's in the cathode of the S-meter tube ckt.  In both 
my cases the pot was scratchy, and the series resistor had drifted high. 
  I put in some lower res. resistors, and got the pot so at least it was 
in a better spot.
	I'm sure someone else here will come up with the res. nrs, but you 
should be able to find them from my description.
73, cu in the next CX,

Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 1/1/2017 5:39 PM, Bill Stewart wrote:
> The s-meter on my 75S3 worked ok after I did some minor repairs
> on the rcvr...that's been several years ago. But now, set up for CW
> and RF gain at max.(full CW position), the meter pegs to the left pretty
> hard and I stopped using the rcvr fearing damage to the meter. The RF gain
> has to be turned back CCW a good bit before the meter will come back,
> off the LH peg, to the zero mark. Now I wanna get that rcvr back on
> line. Before I go into it, I wonder if anyone can point me toward a
> possible fix..could it be just an internal adjustment? Tnx for any guidance.
> 73 and HNY de Bill K4JYS
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