This is from the manual
S meter adjustments
mechanical adjustment-
Turn the receiver off. Directly below the S-meter on the front panel is a round metal medallion which is pivoted at the bottom so that it may be rotated to one side to provide access to the meter adjustment screw. Carefully rotate this adjustment screw until the pointer is in line with the right hand index mark on the "S" meter.
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If this doesn't work then you are going to have to investigate the following parts first, then voltages.
Before plugging in the set do the following check to make sure the values are correct.
C10A cap 4000mmf from ground may be defective and reducing voltage.
R9 330,000 ohms
R42 should be 3,300 ohms
and c108 4000mmf
R43 ("S" meter adjust) can be either 200 ohms or 500 ohms
R 44 82 ohms 1/2 watt yellow lead from meter
For voltage checks set front panel control to the following:
Electrical adjustment-
1. Short the antenna terminals to the chassis
2. Set the receive/standby switch at, RECEIVE, B.F.O. switch at OFF, SENSITIVITY control fully clockwise and the NOISE LIMITER switch at OFF.
3. Turn the receiver on.
4. The electrical adjustment control for the "S" meter is located on the rear apron of the chassis, Slowly rotate this control until the "S" meter pointer indicates zero.
BFO off
Reception normal I.F.
Noise limiter on
Main tuning - low freq end of dial
Band-spread - low freq end of dial
Band selector band 1
tone CCW
Volume CCW (switch on)
Receive/ Standby Receive
Sensitivity CW
Check for the following voltages.
V2 (6AU6-1st Converter)
Measured between socket terminals and ground with zero signal input
(K) cathode 5v
(SG) suppressor grid 75v
(P) plate 250v
(G) (PIN 6)Grid -12 (or 0v varies depending on setting of main tuning gang and switch)
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