Lincolnshire Heritage Telephone Exchange
Lincolnshire HeritageTelephone Exchange


We decided that it would be nice to add lamps to the connecting circuit and exchange line relay sets.  To do this we took a wire from U12 (battery) and a wire from one of the contacts on the B relay to the lamp terminals which are normally redundant.

Below, first video we made shortly after starting work on the pabx7.  if you watch closely you can see the uni-selectors stepping.  You may also see that occasionally when 0 or 9 is dialled the connecting relayset wiper does not return to normal as it should, further work was needed to clean contacts.

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