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Vintage Telephony and Telecomms Vintage Telephones, Telephony and Telecomms Equipment |
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23rd Jun 2022, 10:34 am | #1 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,127
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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?
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24th Jun 2022, 12:27 pm | #2 |
Heptode
Join Date: Jan 2008
Location: Hakadal, Norway
Posts: 643
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Re: Usinf Bellset 31 for CB/auto in place of Bellset 37
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.
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25th Jun 2022, 8:08 pm | #3 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,127
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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
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26th Jun 2022, 8:07 am | #4 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
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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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Mending is better than Ending (cf Brave New World by Aldous Huxley) |