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Antique Radio Technical Forum
GE #408 Radio Am and Fm

Posted by Norm Leal on 04/26/2009 10:27

Hi

This radios uses a 1 - 12BA6 as RF amplifier and 2 as IF amplifiers. FM requires more tubes than AM. Here is the circuit.

http://techpreservation.dyndns.org/schematics/51/51_General%20Electric_408_47.djvu

Norm

:Have not looked at the print of your AM/FM radio. But a 12BA6 is a remote cutoff pentode. This is used as a wide band RF amp for both AM & FM. Is also used for IF amp. Used again for converter. Many of the same tube number types can be used for different applications in radios.
:An AM/FM is a good example of this.



GE #408 Radio Am and Fm 
Jesse Hancock 04/23/2009 22:46 
Warren 04/24/2009 01:58 
Norm Leal 04/26/2009 10:27 

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