09-27-2013, 08:44 PM
Hi Keith
The majority of Philco 71 chassis (Code 121/221 and 123/223) have a single large tube shield on the left (when looking at the chassis from the back), like the late version of the Philco 70.
Towards the end of 71 production, Philco switched to individual cylindrical shields over the RF, Det-Osc and IF tubes.
Shadow meters were also added to Philco 71 sets sometime during production. I'm pretty sure that no code 121 or 221 model 71 sets had shadowmeters. I'm thinking these were added during production of code 123/223; and by code 125, a shadowmeter was standard.
The majority of Philco 71 chassis (Code 121/221 and 123/223) have a single large tube shield on the left (when looking at the chassis from the back), like the late version of the Philco 70.
Towards the end of 71 production, Philco switched to individual cylindrical shields over the RF, Det-Osc and IF tubes.
Shadow meters were also added to Philco 71 sets sometime during production. I'm pretty sure that no code 121 or 221 model 71 sets had shadowmeters. I'm thinking these were added during production of code 123/223; and by code 125, a shadowmeter was standard.
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Ron Ramirez
Ferdinand IN
