The PHILCO Phorum

This is an 11 inch speaker. I was told it came from a 37-630 but I can't confirm this based on the following part numbers. There is no number stamped on the basket. The number AU-2562-WA7 is stamped on the field coil and the output transformer has the number 32-7560N on it. The field coil reads 1.2K, primary of the output transformer reads 168 ohms and the voice coil reads about .5 ohms. My searches are coming up empty. I'm hoping someone here can be of further help.

Thanks,
Pepperoni

Photos always help.

Pictures.

Looks pretty close. I just removed a chassis and speaker from a 37-630 a week ago. Looks identical other than the missing wire cover and that the number on the field coil is stamped AH-2557-W... lettering past the W is obscured.

I removed the wire cover from the output transformer for the purpose of taking a pic of the transformer. Here's the best specs I can find for the 37-630 model speaker and it's labeled as a -630X. Note the specs on the transformer and field coil highlighted in red. The output transformer on this speaker reads 168 ohms as stated earlier. 

Can I use the speaker in question on my 37-630?

H-24
10-1/2"
36-1224
37-630X
1-6F6G as Pentode
2580
7,100 Ω
1.25 Ω
02625
450 Ω - Output Transformer Primary
36-3665

1140 Ω - Field Coil Resistance

Pepperoni

Don't think it would a problem. The important factors are the impedance of the primary of the output transformer (not the dc resistance, that tells you nothing other than the transformer is usable or defective). The field coil resistance isn't particularly critical as most Philco set the coil isn't used to develop - bias by being connected to the ct of the power transformer. When it's connected to the + side of the power supply a different resistance will make a minor difference in the level of HV but it's usually of little consequence. The final factor is the current rating of the field coil. Not enough them you run the risk that the coil overheat and burn out. Too much and I think it would lower the efficiency as the electromagnet wouldn't make as much magnetizum.

GL

Okay thanks.

Pepperoni