Quote:
Originally Posted by init4fun
To me , to be honest , I'd rather the sixth tube , if we're going from an AA5 to a six tube radio , be an additional IF amp stage rather than an RF amp . The additional IF stage would benefit selectivity but costs the extra IF transformer as well
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Not necessarily, I have also seen a "cost effective" addition of an additional IF amp stage without adding another IF transformer, by simply RC coupling two tubes together between two transformers. IIRC, this trick was also used on some Philco models, causing some confusion as to the number of *actual* IF stages in the radio, similar to the confusion caused by adding a RF stage *without* using a 3 gang tuning capacitor. Check the schematics to be sure, especially on 40s-50s Philcos.
jr