top of page

DIY Gallery
Here are several closeup pictures of the DIY 8-line telephone system.

Views of the rear side

Jacks for eight phones

Dial tone generator
From an “Army Surplus” store

Closeup of the Line (upper) and CO (lower) relays for phone #2
The dust covers kept the relays in pristine condition even after ~50 years of storage and a destructive water leak.
​
The majority of the relays were manufactured by C.P. Clare & Co., while the four rotary steppers were produced by the Automatic Electric Company. Notably, no parts were sourced from AT&T as they did not cater to public sales. Due to iterative design, seven additional relays were incorporated beyond the initial plan of approximately 46. As a result, supplementary relays were discreetly positioned on the inner side wall.

Four supplemental relays mounted rear, inside wall

Selector usage monitor lamps, AC voltage adjuster, transformers
bottom of page