Thread: REN Booster
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Old 14th Mar 2011, 10:38 pm   #32
AndiiT
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Default Re: REN Booster

Quote:
Originally Posted by Maestro Maker View Post
Worked like a charm! Would that work now?MM
There seems to be no reason that it shouldn't, subject to the line length limits from the exchange I suppose.
Quote:
Originally Posted by Maestro Maker View Post
Also used a thermistor to stop dial tinkle.
Thermistors were often used to prevent bell tinkle, as were additional gravity switches on some installations.
The "official" method of preventing Bell tinkle on a Plan 1A installation, which would have probably been the most common of standard domestic installations (along with Plan 4 plug and socket as maybe the second most common), was to use an extra "Anti - Tinkle" wire which effectively shorted out the bell circuitry during dialling from any of the telephones.

With series wired bells each telephone in the circuit was designated either Main, Intermediate and Last - for instance a two phone installation would not have any intermediate stations and a four phone installation would have two intermediates; all the intermediate stations were wired identically but the Main and Last were exclusively wired.

The N diagram for Plan 1A can be seen here the Anti-tinkle wire is strapped from T6 (via BT1) to each telephone.

Regards
Andrew
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