Telephone Switching > Magneto & Manual (Cord Boards etc)

Switchboard Lamps

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Babybearjs:
and that reminds me.... are some of those lamps wired in series with the actual phone line? I've forgotten the wiring on a switchboard... so used to seeing things controlled through relays!

Fabius:
Thanks for the great information. I always have trouble searching in TCI library due to ineptness on my part.

The builds in my 2 555s are K2.

RB:
The station lights are indeed tied to the RING side through switches.
The trunk/incoming call side light is also, but after a series of relays operate.
on a 555 board, anyway...
So...it does look like the bulbs were tuned to the loop length.
New wrinkle in the brain!

Babybearjs:
Yup! then LEDS won't work in that situation... unless the circuit is modified to accept them...

Fabius:

--- Quote from: Fabius on June 26, 2019, 09:50:10 PM ---
The builds in my 2 555s are K2.

--- End quote ---

Opps ??? Bulbs, not builds

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