Dissection complete.
Found a "minute" wisker of copper that WAS formerly connected to the voice coil..... broken....and so small as to make it impossible to mend..... copper wire is finer than a human hair.
So there were no continuity acroass the two ear piece..... which explains why only one earphone worked.
Much like when I dissected frogs in class I could never put the frog together again.... so that earphone is Kaput!!
Now will turn my attention to a more complete NO 1 set with chamois covers..... it also only works on one earphone..... but will tread lightly and not do a full irreversible dissection.
Meanwhile I have opened up the control box and using the previous schematic I beleive that I can installattach a more modern earphone, so looking at installing a 1/4 male/female jack. This should allow me to test further the rec/trans. and see if it work properly.
I fear that most of the rubber bellshaped connectors have corroded contacts and the rubber is as hard and brittle has hard wood. They may look OK for a static display but for actual use very impractical. I know of no means to make the rubber soft again. Installing a jack or having a female jack hang out of the control box is relatively easy as the boxes already have two soft rubber plugs to pass the wired through.
Bob
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Bob Carriere....B.T.B
C15a Cab 11
Hammond, Ontario
Canada
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