Opened up this Philco, and what the.....??

[Findm-Keepm]

Originally Posted by old_coot88

If the bulbs are directly in series with the caps, they would add a huge "ESR" value, diminishing the caps' effectiveness.
'Specially the one coming directly off the rectifier.

A #44 bulb has about a tenth of an ohm cold resistance, hardly a huge ESR value. I have a 1940's Coyne manual that details adding current limiting of B supplies with a dial lamp. Exceed the current rating of the bulb, and it blows, and in-between, it limits the current. It saved many a costly power tranny.

You've got an old-timer's following of the Coyne Radio repair manual. I have only a couple of volumes - it was 8 in all.

Cheers,