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#7
01-13-2005, 11:08 AM
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The last Zenith tube radio's line up was I believe:
12DT8 FM convertor and RF amp 12BA6 AM convertor 12BA6 IF amp 12BA6 IF amp #2 12AU6 Limiter 14GT8 FM discriminator, AM detector, 1st stage audio 35C5 audio output Silicon power rectifier Some of the earlier models used 2 seperate tubes in the FM RF section (6BJ6 RF amp and 12AT7 mixer and oscillator perhaps?) and used a 19T8 for the discriminator, AM detector and 1st audio. It seems like it is the limiter-discriminator system rather than the ratio detector used in most other tube FM table radios of the 50's and 60's that gives the Zenith the performance edge. Last edited by Chad Hauris; 01-13-2005 at 11:10 AM. 
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