Graybar Electric Co. GB-8(RCA) Schematic

Graybar Electric Co. GB-8(RCA)

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Product Information:
Model:GB-8(RCA)
Manufacturer:Graybar Electric Co. (Old RCA)

Schematic Pages

PNG: Page 1 Rider Manual Volume 1
PNG: Page 2 Rider Manual Volume 1

Schematics Content

Page 1:

SERVICE NOTES *
The can at the extreme center rear of the top of the chassis is AF transformer assembly. Directly in front of it is the RF bypass capacitor pack The can at the left front facing the chassis is the 10 mld electrolytic conden ger. Directly to the rear of this can is the 4 mfa alectrolytic condenser. To the right of this can, towards the center of the chassis 1s the RF transformer.
The 600 KC trimming condenser is accessible by means of a screw adjustment located on top of the chassis, to the right of the electrolytic condenser cans, between the cane and the RF transformer.
The 1400 KC line-up condensers are accessible through three holes in the bottom of the cabinet. With the cabinet tilted away from the operator and the rear of the chassis to the right of the operator, the extreme left hand hole is for the RF condensers, the middle hole for the detector condenser and the extreme right hand kole is for the oscillator condenser.
The IF transformer tuning condongers are accessible from the roar of the chassis. The two holes near the magnetic pickup terminal board are for the 2nd IF transformer. With the cabinet on its side, the upper hole is for the Primary circuit and the lower hole is for the secondary circuit. The lower pair of holes, near the edge of the chassis are for the 1st IF transformer. The upper bole is for the Secondary circuit adjustment and the lower holo is for the Primary circuit adjustment.
The tone control oan is opened by pressing with a pin or sharp Instrument through the hole in the side of the can.
For 110 volt operation interchange the black and red lead with the folded over and tapped end, with the black with red-tracer lead connected to one of the terminals. When the change has been made tape up the black-red lead.

Page 2:

SUPERETTE