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Old 6th Nov 2019, 11:52 am   #49
Join Date: Nov 2016
Location: Budapest, Hungary
Posts: 348
Default Re: Vintage Radio and Phonograph cutter schematic

Originally Posted by ms660 View Post
No, don't bypass the field coil of the internal loudspeaker, that winding is essential for the proper operation of the unit.

An external loudspeaker can be used plugged into the jack socket provided.

That will disconnect the internal loudspeakers voice coil, the external loudspeaker can be either of the permanent magnet type or the electrodynamic type, if an electrodynamic type is used it will have to have its own field coil supply.


Hey Lawrence, another quick question and thank you for your advise in advance as always...

I thinking to change the value for the second filter capacitor. Would a 100uF ,275 WKG 350 Surge be an acceptable choice? I know the voltage calls for a 450V rated cap but there I will not get more than 250V and these can capacitors I have are really a god quality.

I kept the first filter connected to the 5Y3 the same 16uF/450V

Would this reduce the hum?

Many thanks!
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