5. Adjusting Antenna Compensating Condenser
This adjustment should only be made after the receiver has been properly installed in the car with the antenna connected to the receiver. Tune the receiver to a weak signal at the high frequency end of the broadcast band at about 1200 K.C. and with the antenna fully extended, adjust the antenna compensating trimmer (Illus. L, Fig. 6) for maximum signal strength.
Do not attempt to make any other alignment adjustments with the receiver installed in the car.

(a) Remove speaker (front) cover, rear cover and the bottom of tuner section. Unsolder the connecting leads from the volume control and other points in the chassis.
(b) Remove the link and arm arrangement that operates the band switches by first removing the two units, (A), holding the short link arm (B) to the band indicator shaft.
(c) Remove screws (C) and link arms (D) from each of the band switch shafts, but in removing the center one, care should be taken not to lose the two steel rollers and "S". spring (which are loose on the assembly) from the detent device at the base of the center coil unit.
(d) Remove the four units (B) which hold the coil plate (F) to the tuner assembly and withdraw the coil plate from the assembly, being careful to prevent the coil cores from striking any part of the assembly which may result in breakage of the core.
(e) After removing the two small screws located at the base of each coil unit, the coil units can then be removed from the coil plate. In re-assembling the cores into the coil units, hold the coil plate (F) slightly " off-square " from the cores, then insert the core nearest its coil, one by one, as the coil plate is brought square with the tuner assembly frame.

REMOVAL OF COIL UNIT
Should it become necessary to remove a coil unit, the following procedure should be followed:

Adjust trimmer G to match car antenna (1430 XC) when radio is installed.

Rock gang condenser back and forth through signal during 600 K.C. adjustment of screws H & J. See Bulletin 6D-2 for complete Alignment Procedure.

PUSH BUTTON SET - UP

Release holding spring in bottom of button, pull button off. Loosen re-set screw, tune in desired station. Push in re-set screw until it bottom. Release and tighten screw. Replace button.

For other data, see index

Tolerance on voltages +/- 10%. Current drain with speaker and dial light connected 8.1 amperes. "8" supply drain 65MA.

Tuner Picture

Model 980690
Escutcheon Cross Section

Parts Layout - Tube View

Parts Layout - Chassis View