03-31-2018, 04:57 PM
Does anyone know if the speaker from a 70 and 71 are the same? I am strictly talking about cathedrals.
Thanks.
Thanks.
If it glows in the dark and heats up the house its MY kind of radio!
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speaker question.
03-31-2018, 05:17 PM
The 20,70,and 90 used several alliterations of the K speaker (sometimes called a pie pan speaker). It sports a painted brown or coated gray basket. The 71 uses a later K speaker that should work but ascetically is different. The 71 speaker may be hardwired in without a 4 pin plug. Ron would know better than I.
Early https://www.worthpoint.com/worthopedia/s...-132420086 Later https://antiqueradio.org/philc08.htm 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 
03-31-2018, 05:46 PM
Nope, the 71B used a K-7 speaker which has an 1125 ohm field coil. 20, 70 and 90 cathedral speakers all have 3100 ohm field coils.
more info here: http://www.philcoradio.com/phorum/showth...hp?tid=215 Scroll down to, and download speakers.zip which was made in and intended for Microsoft Excel but also works in LibreOffice Calc and OpenOffice Calc. -- Ron Ramirez Ferdinand IN 
03-31-2018, 05:48 PM
thanks guys that answers it...
If it glows in the dark and heats up the house its MY kind of radio!
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