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-   -   Usinf Bellset 31 for CB/auto in place of Bellset 37 (https://www.vintage-radio.net/forum/showthread.php?t=192180)

Dave Moll 23rd Jun 2022 9:34 am

Usinf Bellset 31 for CB/auto in place of Bellset 37
 
Thanks to forum member PMMunro, I have recently acquired a pendant telephone 246, along with a bellset 31. The latter is designed for use with a local battery for magneto, CBS or a long line on CB/auto.

Is it possible to rewire the bellset 31 to behave like a bellset 37, i.e. without the use of a local battery?

dagskarlsen 24th Jun 2022 11:27 am

Re: Usinf Bellset 31 for CB/auto in place of Bellset 37
 
1 Attachment(s)
No, and yes. You have much more experience with British telephones than me, but I' believe that it will work with this circuit, but no anti sidetone circuit.

Dave Moll 25th Jun 2022 7:08 pm

Re: Usinf Bellset 31 for CB/auto in place of Bellset 37
 
In the end I have wired it as a "long line CB/auto", with the transmitter energised by a local battery, as follows:

T1 -> B1
T2 -> B9 -> T6
T5 -> B3 -> T8
T7 -> B4 -> Batt+
T9 -> B2 -> T10 (via dial if present)
Batt- -> B5
A leg -> B6/B7
B leg -> B8

Dave Moll 26th Jun 2022 7:07 am

Re: Usinf Bellset 31 for CB/auto in place of Bellset 37
 
For completeness, I should have included that T3 and T4 are strapped internally.


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