11-13-2013, 03:09 PM
Well.....you get yourself a DMM, digital multimeter, like this one:
http://www.newark.com/jsp/search/product...75021|plid|
Or...whichever else.
Then you disconnect your power, disconnect your speaker (which is easy - it is connectorized), look at the 20's speaker wiring diagram and measure the resistance across the field coil.
http://www.newark.com/jsp/search/product...75021|plid|
Or...whichever else.
Then you disconnect your power, disconnect your speaker (which is easy - it is connectorized), look at the 20's speaker wiring diagram and measure the resistance across the field coil.