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Old 17th Jul 2017, 8:26 pm   #9
crackle
Rest in Peace
 
Join Date: Mar 2011
Location: Basildon, Essex, UK.
Posts: 4,100
Default Re: Telephone Set H Mk III

I have had a go at cleaning up the circuit diagram, and typed up the instructions.

It seems like the .5uF capacitor is there to limit the pulses from the magneto from damaging the sensitive ear and mouth pieces, but it is shorted out during speaking so as not to reduce the signal.
Maybe the operation of the switch would be more noticeable when a long wire is in use.

Mike
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Last edited by crackle; 17th Jul 2017 at 8:42 pm.
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