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Joined: Oct 2018
City: Marion
State, Province, Country: IA
I bought a model 52B from a local collector. Cabinet is near perfect and the chassis is untouched. I've never worked on a radio this old, and joined the Phorum. My radio has a sticker on the back that identifies it as a Chassis Type 52.
My first question involves the tube lineup for the RF/IF/Det/Audio/Rectifier functions.
The set came with 24 / 39(44) / 24 / 47 / 80
The schematic on the Phorum lists: 24 / 35 / 24 / 47 / 80
Inside, on the tube shield is a sticker that says "Philco Model 224" and it has a beautiful 3D drawing of the chassis. It lists 36 / 44 / 36 / 42 / 80
I can post pictures if this helps, thanks for any info!!
Dave Gribble
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City: Roslyn Pa
Hi Dave and welcome,
>The set came with 24 / 39(44) / 24 / 47 / 80
There's one tube in this group that doesn't belong. The 39/44 has a 6.3v heater where all of the other are 2.5v tubes. I'd go w/the chassis sticker as the tube shield may have been changed somewhere along the line. Methinks you'll be needing a 35 tube it's also goes by 35/51. In a pinch a 24A would probably work.
< It lists 36 / 44 / 36 / 42 / 80
These are similar to the above tubes BUT have 6.3v heater (barring the 80 it's 5v).
Oh come to think of it if it has a 47 tube in it it has to have a 2.5v set of tube as the 42 uses a different socket.
Hope this answer your question.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
(This post was last modified: 10-30-2018, 09:02 PM by
Radioroslyn.)
Posts: 5,160
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City: Wilsonville
State, Province, Country: OR
Welcome to the Phorum!
Tubes 24, 35, and 47 all have a 2.5v filament requirment
A 39/44 tube uses 6.3v so it was probably added in there because it sorta looks like a 35 to make a sale easier, I don't think it would work in a 2.5 volt system....just a guess.
If I remember correctly a Model 224 is an exported version of a 24 but I can't locate a schematic. The 52 sticker on the chassis should be a positive ID that its a 52. The tube shield may have come from another set. I doubt if it left the factory that way but who knows...1932 was a rough year for radio sales and they may have made some short cuts.
Others more familiar with these will surely chime in with thoughts. Pictures might help.
update: I see Terry was typing at the same time I was ... he knows a LOT more than I do...
Posts: 7
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Joined: Oct 2018
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