09-23-2012, 08:30 PM
No difference in the shields themselves, only in the shield bases.
1937 shield bases are the best if you need to change a base out, because they only have four flat "fingers" that hold the shield, allowing you to use any type of tube that will fit the socket - G, GT or metal. But 1936, 1938 and 1939 bases have an opening where only a "G" tube will fit. (This did not apply to 1936 models as only standard base tubes were used in the 1936 Philcos, not octals.)
1937 shield bases are the best if you need to change a base out, because they only have four flat "fingers" that hold the shield, allowing you to use any type of tube that will fit the socket - G, GT or metal. But 1936, 1938 and 1939 bases have an opening where only a "G" tube will fit. (This did not apply to 1936 models as only standard base tubes were used in the 1936 Philcos, not octals.)
--
Ron Ramirez
Ferdinand IN
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