Just started playing with a few old radios for about 6 years now which makes me a novice. Never paid much attention to the schematics of the old Radiola III's. The other day was looking at it and I think there is a mistake on the interstage transformer. The diagram shows a capacitor, er, condenser connected across the transformer, after checking both of my Radiola III's this is in error, or am I wrong? Also the metal tabs on the wires one of them says -C 1 1/2 volts. Should not this be -4 1/2 volts.

Don't know for sure. But this may be a clue about that.

http://www.radiolaguy.com/Showcase/RadiolaIII.htm

Hi Bob

The cap you mention is a metal strip mounted right at interstage transformer terminals. Doesn't look much like a cap.

C voltage depends on B+ voltage. Since this radio calls out 40 volts for B+ a C- voltage of 1 1/2 would be enough. If you use higher B+ increase negative C voltage.

http://www.nostalgiaair.org/PagesByModel/349/M0040349.pdf

Norm

:Just started playing with a few old radios for about 6 years now which makes me a novice. Never paid much attention to the schematics of the old Radiola III's. The other day was looking at it and I think there is a mistake on the interstage transformer. The diagram shows a capacitor, er, condenser connected across the transformer, after checking both of my Radiola III's this is in error, or am I wrong? Also the metal tabs on the wires one of them says -C 1 1/2 volts. Should not this be -4 1/2 volts.
:

:Hi Bob
:
: The cap you mention is a metal strip mounted right at interstage transformer terminals. Doesn't look much like a cap.
:
: C voltage depends on B+ voltage. Since this radio calls out 40 volts for B+ a C- voltage of 1 1/2 would be enough. If you use higher B+ increase negative C voltage.
:
:http://www.nostalgiaair.org/PagesByModel/349/M0040349.pdf
:
:Norm
:
::Just started playing with a few old radios for about 6 years now which makes me a novice. Never paid much attention to the schematics of the old Radiola III's. The other day was looking at it and I think there is a mistake on the interstage transformer. The diagram shows a capacitor, er, condenser connected across the transformer, after checking both of my Radiola III's this is in error, or am I wrong? Also the metal tabs on the wires one of them says -C 1 1/2 volts. Should not this be -4 1/2 volts.
::
:

:Hi Bob
:
: The cap you mention is a metal strip mounted right at interstage transformer terminals. Doesn't look much like a cap.
:
: C voltage depends on B+ voltage. Since this radio calls out 40 volts for B+ a C- voltage of 1 1/2 would be enough. If you use higher B+ increase negative C voltage.
:
:http://www.nostalgiaair.org/PagesByModel/349/M0040349.pdf
:
:Norm
:
::Just started playing with a few old radios for about 6 years now which makes me a novice. Never paid much attention to the schematics of the old Radiola III's. The other day was looking at it and I think there is a mistake on the interstage transformer. The diagram shows a capacitor, er, condenser connected across the transformer, after checking both of my Radiola III's this is in error, or am I wrong? Also the metal tabs on the wires one of them says -C 1 1/2 volts. Should not this be -4 1/2 volts.
::
: