Have a Philco pt-25 that is dead, nothing from the speaker. Tested all the tubes in another radio, and it played fine. Used an Ohm meter across the output transformer and heard some speaker noise. Found an open in one side of the 2nd IF transformer. The side connected to the 7C6 tube pin 5. Can this be by-passed using a resistor and cap method? Pin 5 is not a grid connection as shown in the bypass instructions (antiqueradios.com), but an anode connection.

Hi Fred

You can bypass an open winding in an IF Transformer. In this case pin #5 is a diode detector plate. Just connect a resistor across the open winding. Then a small cap from the previous stage to pin #5. Cap can be 100 pf. Resistor 47K.

Norm

:Have a Philco pt-25 that is dead, nothing from the speaker. Tested all the tubes in another radio, and it played fine. Used an Ohm meter across the output transformer and heard some speaker noise. Found an open in one side of the 2nd IF transformer. The side connected to the 7C6 tube pin 5. Can this be by-passed using a resistor and cap method? Pin 5 is not a grid connection as shown in the bypass instructions (antiqueradios.com), but an anode connection.
:

:
Norm
Thanks for the response.
Fred

Hi Fred
:
: You can bypass an open winding in an IF Transformer. In this case pin #5 is a diode detector plate. Just connect a resistor across the open winding. Then a small cap from the previous stage to pin #5. Cap can be 100 pf. Resistor 47K.
:
:Norm
:
::Have a Philco pt-25 that is dead, nothing from the speaker. Tested all the tubes in another radio, and it played fine. Used an Ohm meter across the output transformer and heard some speaker noise. Found an open in one side of the 2nd IF transformer. The side connected to the 7C6 tube pin 5. Can this be by-passed using a resistor and cap method? Pin 5 is not a grid connection as shown in the bypass instructions (antiqueradios.com), but an anode connection.
::
:

Update: The radio is working now after repair of the IF. It pulls in many stations across the band. The only problem is a bad connection on either the 35A5 or 35Z5 tube socket. Some times the volume drop out or is very low. Moving those tubes brings it back.
Thanks again Norm.

::
:Norm
:Thanks for the response.
:Fred
:
:
:Hi Fred
::
:: You can bypass an open winding in an IF Transformer. In this case pin #5 is a diode detector plate. Just connect a resistor across the open winding. Then a small cap from the previous stage to pin #5. Cap can be 100 pf. Resistor 47K.
::
::Norm
::
:::Have a Philco pt-25 that is dead, nothing from the speaker. Tested all the tubes in another radio, and it played fine. Used an Ohm meter across the output transformer and heard some speaker noise. Found an open in one side of the 2nd IF transformer. The side connected to the 7C6 tube pin 5. Can this be by-passed using a resistor and cap method? Pin 5 is not a grid connection as shown in the bypass instructions (antiqueradios.com), but an anode connection.
:::
::
: