TELEPHONE No. 30

Originally called the "Telephone, Micro, House, with Press Button Key" but was later renamed as the Telephone No. 30.

It was a Local Battery handset with press button in handle for use on House telephones.

There is only a two wire connection to handset, so the microphone and receiver are connected in series.

A "Buffers for Microtelephones" was available and this was a rubber ended thimble that fitted over the nut on the Transmitter stem.

Used on Telephone No's 29, 31, 33 & 35.

Found in the 1915 rate Book.

Telephone includes (1928):-
1 x Cord, Instrument No. 219.
1 x Diaphragm No. 18.
1 x Earpiece No. 8.

Telephone includes (1956):-
1 x Cord, Instrument No. 2/19A, Brown, 48".
1 x Diaphragm No. 18.
1 x Earpiece No. 9.

Made obsolete in 1947.

Circuit Diagram - N130 and TL230.

Information on all House telephone systems
 

Last revised: June 29, 2026