RECEIVER INSETS


Receiver Inset No. 1L

Used in most early Bakelite handsets.
Superseded by the Receiver Inset No. 2P.

Used with an Earpiece No. 18 and Diaphragm No. 12.

Note the exposed coils in the centre of the receiver.
 

Receiver Inset No. 2P

Used in later Bakelite handsets.

Used with an Earpiece No. 23 and Diaphragm No. 25.

Note the top of the receiver is enclosed, with a small air vent.

Receiver Inset No. 2P Mark 3 was introduced around 1949.
 

Receiver Inset No. 2/3T

Used in 700 handsets.  Introduced in the 1980's as an aid to those who wore hearing aids.  The receiver had a coil of wire wound around the outside and this would interact with a hearing aid that was switched to the 'T' setting.

 

Receiver Inset No. 3T

Used in Headsets and Trimphones.


 

Receiver Inset No. 4

Used in many 700 type telephones.

Later Receiver Insert No. 4's  comprised of a No. 3T inserted into a plastic housing which resembled the No.4 - dimension wise.

 

 
 

 

 
 
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Last revised: January 31, 2014

FM