12-30-2009, 09:32 PM
Steve,
Thank you so much for your advice. I was going to do some wire tracing to see what was open but testing the speaker connector pins as you suggested made it easier. Using your convention; holding the speaker plug facing me, starting with the small pin (as pin #1) and working clockwise, it appears to me that pin #2 only connects to one end of the field coil and pin #3 connects to the primary center tap and the other end of the field coil. Regardless, I have no continuity between pins 1&2 nor do I have any between pins 2&3. Its 150 ohms between pins 3&4 and 150 ohms between pins 1&3. 300 ohms between pins 1&4. This indicates what I feared most has happened; the field coil is open. Not sure what to do about that other than to try and find another speaker. Thanks for your help.
Lou
Thank you so much for your advice. I was going to do some wire tracing to see what was open but testing the speaker connector pins as you suggested made it easier. Using your convention; holding the speaker plug facing me, starting with the small pin (as pin #1) and working clockwise, it appears to me that pin #2 only connects to one end of the field coil and pin #3 connects to the primary center tap and the other end of the field coil. Regardless, I have no continuity between pins 1&2 nor do I have any between pins 2&3. Its 150 ohms between pins 3&4 and 150 ohms between pins 1&3. 300 ohms between pins 1&4. This indicates what I feared most has happened; the field coil is open. Not sure what to do about that other than to try and find another speaker. Thanks for your help.
Lou
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