04-08-2021, 10:55 AM
Terry Eric
It depends If all the power goes thru it or if it is a just load on the power supply.
It's been my limited experience that the field coil does double duty. It serves as a filter choke for the power supply and also as an electro magnet for the speaker.
As a choke filter one would not want 200 volts dropped across it when the power supply is about 400 volts total. That would mean that some 50 percent of the power is lost.
I would think as a inline (series) choke it should be more like 40 to 60 volts drop max.
If it's a load running at the 400 volts it could be 7k ohms. That's a big load for the power supply at some 57 milliamps.
It depends If all the power goes thru it or if it is a just load on the power supply.
It's been my limited experience that the field coil does double duty. It serves as a filter choke for the power supply and also as an electro magnet for the speaker.
As a choke filter one would not want 200 volts dropped across it when the power supply is about 400 volts total. That would mean that some 50 percent of the power is lost.
I would think as a inline (series) choke it should be more like 40 to 60 volts drop max.
If it's a load running at the 400 volts it could be 7k ohms. That's a big load for the power supply at some 57 milliamps.
!!!!!!!!!!!!!!!!!!!RESISTANCE IS FUTILE!!!!!!!!!!!!!!!!!!!!!!
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[Image: http://philcoradio.com/phorum/images/smi...on_eek.gif] Chris
