[Hallicrafters] HALLICRAFTERS "S" METERS

[Kenneth G. Gordon]

Beill Gerhold wrote:

> This same information is free of charge on the BAMA site.  I uploaded a
> pristine copy of the entire manual some time ago.  Select Hallicrafters and look
> under "S Meter".  The entry looks like this:
> 
> "Hallicrafters Service Bulletins 1954-8 and 1954-10 covering the
> installation of an S-Meter for Models S20R, S38 series, S40A, S40B, S40BU,
> S53A, SX62, S77, S77A, S85, S85U, S86, S107, S108 and S120 series.
> Compliments of Don Cunningham, WB5HAK and Bill Gerhold, K2WH"

First of all, I want to thank you, Bill, and Don for making this information 
available. The info contained therein also can be used with many other 
receivers which never originally came with "S" meters.

However, on page two, in the part detailing how to set the zero of the 
meter used, this information does NOT make clear that a NORMAL 
meter MUST be mounted upside down in order for these directions to 
make sense.

For instance, the bulletin says, under "Mechanical Zero Set:" with the 
receiver OFF, using the pointer adjustment screw, set the needle on the 
last calibration mark on the RIGHT of the meter. 

This can only be true if a NORMAL meter is upside down, or you have a 
reverse-calibrated meter mounted right-side up. I.e, one in which zero 
is all the way to the right, and the meter reads "down" with increasing 
current.

Then the bulletin says, under "Electrical Zero ser" (sic.) to, among other 
things, set the meter pointer all the way to the LEFT with the zero-set 
pot. With no signal, this would be the point at which the RF or IF stage 
has the highest current flowing.

Ken Gordon W7EKB