06-25-2023, 07:43 PM
Hi Mike and welcome.
This might help you see what the differences are between the 2 speakers you are looking at and the one you are getting. The model 70 and it's other alliterations use the same speaker as your single 47 model 90. Also bear in mine that the resistance for the opt that you are quoting is the dc resistance not the ac load that is presented to the tube.
https://philcoradio.com/library/index.ph...-21-70-90/
GL de N3GTE
This might help you see what the differences are between the 2 speakers you are looking at and the one you are getting. The model 70 and it's other alliterations use the same speaker as your single 47 model 90. Also bear in mine that the resistance for the opt that you are quoting is the dc resistance not the ac load that is presented to the tube.
https://philcoradio.com/library/index.ph...-21-70-90/
GL de N3GTE
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
