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Speaker replacement question
#2

The PM speaker will require a power resistor to substitute for the field coil. The OEM speaker is also equipped with a hum bucking coil, to use a PM an additional 20% in capacity should be added to the "filter output condenser". Same OEM field coil speaker also has the output transformer for the'42's. Even with a PM speaker the output transformer is required.

You may find the info here helpful to determine the correct output transformer...

http://www.radioremembered.org/outimp.htm

Might also want to check the Push/Pull input transformer that feeds the '42's. That, could have an open winding too.

GL

Chas

Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”


Messages In This Thread
Speaker replacement question - by bobclausen - 11-30-2022, 04:15 PM
RE: Speaker replacement question - by Chas - 11-30-2022, 07:08 PM
RE: Speaker replacement question - by morzh - 11-30-2022, 09:20 PM
RE: Speaker replacement question - by bobclausen - 11-30-2022, 09:39 PM
Bobclausen - by bobclausen - 11-30-2022, 09:50 PM
RE: Speaker replacement question - by morzh - 11-30-2022, 10:30 PM
RE: Speaker replacement question - by Chas - 12-01-2022, 02:36 PM
RE: Speaker replacement question - by bobclausen - 12-01-2022, 07:04 PM
RE: Speaker replacement question - by MrFixr55 - 12-07-2022, 09:27 AM



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