Philco 90- not much volume - Printable Version

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Philco 90- not much volume - doc612 - 02-22-2017

I have recapped my Philco 90A (early model w/45 push pull tubes) and replaced a couple of out of tolerance resistors. All tubes check good, all shields in place, bakelites restuffed. I am receiving 2 stations very clearly, the loudest is close to my home, the 2nd is a little farther away and not as loud but still easily hearable. After this I have to really strain to hear other stations. Is this all the volume I can expect on farther stations with this radio? I am using a 100' wire antenna 25' off the ground. My RCA 17K is picking up a 1000w station 30 miles away right now like it is next door. Have I missed something? Thanks for all suggestions,
Doc

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RE: Philco 90- not much volume - morzh - 02-22-2017

1. Have you performed the alignment? Without it your gain could be really off.
2. Just in case check the Antenna input RF coil 2 for continuity, and also the primary of the coil 7 (or which is the same, plate voltage on the first 24A tube).

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RE: Philco 90- not much volume - Steve Davis - 02-22-2017

As Mike said, most likely an open winding in one of the RF transformers  Check to make sure you have plate voltage on the 24 tubes.

Steve

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RE: Philco 90- not much volume - doc612 - 02-22-2017

I'm on it. I'll let you know what I find. Thanks!

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RE: Philco 90- not much volume - doc612 - 02-22-2017

While checking voltages I found a 1 meg resistor to the grid of the 1st audio tube that was reading 2.5 meg. Replaced it and now this thing is blasting all across the dial! Thanks guys.
Doc

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RE: Philco 90- not much volume - morzh - 02-22-2017

Congrats. Still, do the alignment.

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