Quote:
Originally Posted by Electronic M
A dropping resistor should work. An old timer who REALLY knew his stuff once advised me that if I encounter an open field coil that I could use a similar sized PM speaker with a power resistor of approximately the same value as the field coil to replace the field coil. So logically a resistor in series with a lower resistance field coil should also work.
The difference in winding value was probably as much or more so a function of overall power supply design(ie. voltage, load current, and filtering) specs than of audio output power....Unless the two sets are identical in all but the PS and audio stages, but that is unlikely.
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I've subbed a P.M. speaker for a field coil speaker, but had to increase the value of the filter caps. An R/C filter circuit, can never equal a L/C circuit, as far as hum reduction is concerned.
