08-08-2012, 08:08 PM
Thanks to Chuck Schwark for the scan...now you can download the February 1937 issue of Philco Serviceman that includes the article on bass amplification in the 37-690:
http://www.philcoradio.com/phorum/showth...p?tid=5056
http://www.philcoradio.com/phorum/showth...p?tid=5056
--
Ron Ramirez
Ferdinand IN