Coast to Coast Radio Corp. ME8 Schematic

Coast to Coast Radio Corp. ME8

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Product Information:
Manufacturer:Coast to Coast Radio Corp.

Schematic Pages

PNG: Page 1 Rider Manual Volume 20
PNG: Page 2 Rider Manual Volume 20

Schematics Content

Page 2:

Model ME8 Portable Radio is a 6 - tube, 3 - way portable superheterodyne receiver using the latest octal type of low-drain electronic tubes.

OPERATION: The set operates from 105 to 120 volts, A.C. or D.C. power supply or from self-contained batteries. Power drain is approximately 25 watts on electric operation.

When operated on direct current (D.C.), if no reception is obtained after approximately one minute of warm-up time, reverse the line plug in the power outlet.

RANGE: Model ME8 covers the broadcast band from 532 to 1700 kilocycles. Since the scale is cal. ibrated 54 to 160, the actual frequency of the station received is obtained by adding zero to the dial calibration,

CONTROLS: Three controls are provided. The left hand control puts the set into operation and increases the volume with clockwise rotation. The right-liand control tunes the dial to the desired station. The center slide switch selects electric operation in the left position, and battery operation in the right position.

ANTENNA: No outside aerial is required as more than adequate pickup is obtained by the self-contained loop antenna. In areas of poor reception or for weak or distant stations the loop antenna has a directional effect. The set may be turned to the direction of maximum reception.

BATTERIES: The batteries comprise: two 4/2 volt "A" units, Eveready type 746 or equivalent, and two 45 volt "B" units. Eveready type 482 or equivalent.

They should be mounted in the compartment provided in the bottom of the cabinet, as shown in sketch. Batteries should be removed when they are dead or if " the set is not to be used on battery operation for several months.

ALIGNMENT: No attempt should be made to realign this receiver until it has been determined that a poor tube, or some local condition is not responsible for faulty reception.

The Signal Generator may be connected through a 0.01 mf capacitor (used as dummy antenna) to the log on RF section A of tuning capacitor. Connect ground clip of generator to a convenient B - minus point (such as the case of the electrolytic capacitor, or one of the switch terminals on the back of the volume control). An output meter may be clipped directly across the voice control lugs. Align the I.F. trimmers to 455 kc, using least possible input from Signal Generator to avoid developing A.V.C. voltage which would make the tuning adjustments very broad.

To align RF trimmers, remove the 0.01 mf capacitor and connect the Signal Generator leads to two or three turns of heavy wire, forming a self-supporting loop of about 7 or 8 inches diameter, placed about a foot away from the receiver's loop antenna. Again, use the least possible input from the Signal Generator, With the tuning capacitor plates completely out of mesh, and pointer at extreme right end of travel, adjust the oscillator trimmer (B) (on front section of tuning capacitor) to 1700 kc. Readjust both Signal Generator and tuning capacitor to. 1550 kc. and adjust the RF trimmer (A) (on rear section) for maximum response.