Need Ron's help! (Or maybe others) - Printable Version

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Need Ron's help! (Or maybe others) - Patrick - 06-03-2020

Philco 650B and 655B schematics. Look at the two layouts below. It shows that the 650B has the rectifier tube behind a can cap, and the 655B shows the 80 at the edge of the chassis. But if you look at Ron's 650 (and others), it shows the 80 on the 650 at the edge.

The other difference I have noticed without going through the radio, is the #66 wirewound on the 650 is suppose to be 10-110-130. But on mine, it is 4 sections #57 10-10-110-130.

So in all the documentation, are the model numbers switched? I'm puzzled.

[Image: https://i.imgur.com/pM95tY2.jpg]

[Image: https://i.imgur.com/fDLO6FS.jpg]

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RE: Need Ron's help! (Or maybe others) - simplex1040 - 06-03-2020

Layout you show appears to be a 655 and no B designation. even if radio museum thinks it is, 80 appears next to edge of chassis
Differnet codes(121, 122,125) can have diff production layouts and changes of components.

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RE: Need Ron's help! (Or maybe others) - RodB - 06-03-2020

Hi, I have a 650 chassis on my bench (no suffix). It has the 80 on the edge and the documentation shows the 80 switched with the electrolytic can. I seem to remember reading the tube was moved at some point. My candohm is one section at 7750 which matches the schematic.

There was a lot going on at that time, many changes on the fly.

Rod

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