02-11-2006, 09:58 AM
Looking at my Philco early 30s parts catalogues, they are both 1:4 turns ratio and are used with the same "in" and "out" tube complements (27 driver to p-p 45, 47, 42 or 71-A), so I'd say it should work fine. Both even have the same mounting hole "footprint." 
Chuck Schwark,
The Philco Repair Bench
[Image: http://www.philcorepairbench.com/images/philog3tiny.gif]
http://www.philcorepairbench.com
