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Philco 38-3 alignment
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Completely following the instructions for aligning the Philco 38-3 on the schematic and completely getting nowhere.  Performing the IF align first, then moving to the RF.  The mag tuning switch is closed.  I have a digital frequency counter in line with my signal generator.  I connect the signal gen lead to the cap of the  6A8G, and have tried it with and without the usual lead also attached. Negative for the sig gen is attached to the chassis.  Once I think I've lined up the IF circuit, I can hear the tone continue as I turn the dial to the first position for starting the RF alignment.
The closest I'm able to get is about 60 KC away from where a station should be.  IE, 1080 is coming in at 1020, 650 is coming in at 590, etc.
When the rotary dial is fully closed, it's in line with the tuning gang, so I know it's not off.

I'm getting plenty of clear stations, they are just not in the right place!!!!! Icon_crazy


Messages In This Thread
Philco 38-3 alignment - by DuMont - 05-10-2020, 04:23 PM
RE: Philco 38-3 alignment - by RodB - 05-10-2020, 05:11 PM
RE: Philco 38-3 alignment - by DuMont - 05-10-2020, 05:15 PM
RE: Philco 38-3 alignment - by DuMont - 05-10-2020, 05:34 PM



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