PHONOGRAM SWITCHBOARDS

Phonogram Switchboards

Switchboard Phonogram No. 1
The Switchboard, Phonogram No. 1A was an 18 inch high, wooden unit, that had provision for 16 jack and lamp strips (80 lines max) to be fitted.  The Switchboard would be fixed a Desks TL1629.  Each Switchboard would be shared by two operators, who had their own cords and dial.  A Unit, Auxiliary Apparatus PF3005 can also be fitted.

These are known as "Separate Panel" installations and are provided when 2 to 6 positions are required.   Amplifiers were never used with type of switchboard.

The desk is called a Desks, TL1629, which includes:-
2 x Jacks No. 20.
2 x Jacks No. 40.
2 x Keys No. 282.
2 x Potentiometers No. 8B.

Drawings - 60292 and 64113.

Drawing - CD55 (Layout).

See E.I. Telegraphs, General P1020 for more information.

Switchboard, Phonogram No. 2
This switchboard is similar to the No. 1 except that it provided for 25 jack and lamp strips.

Drawing - 8436.

Switchboard, Phonogram No. 3 and 4
The Switchboard, Phonogram No. 3 is a modular switchboard, consisting of two foot long wooden units that are joined together to make one long multiple.  Each unit is 9 inches high and comprises of two 12 inch long sections, where up to twenty four jack and lamp strips (120 lines max) could be fitted.  The Switchboard Phonogram No. 4 is similar to the No. 3 except the units are 5 foot long and comprise of five 12 inch long sections.

The switchboard units would normally be fitted on 2 inch stands.  A conveyer belt can be fitted under the desk and the 2 inch raised section would have openings to allow forms to drop onto the belt.

These are known as "Single Tier" installations and are provided when 7 to 16 positions are required.

The desk is called a Desks, TL1612.

Drawings -  8573 (No. 3) and 63434 (No. 4).

Drawing - 9995 (Layout).

See E.I. Telegraphs, General P1030 for more information.
 

Switchboard, Phonogram No. 5 and 6
These Switchboards are called the "Double Tier" type.  They are installed when more than 16 positions are required and V belt conveyers are in use.  They are built up from from desk units which form a double sided table.  The switchboard units are fitted on the table and are pre-wired. 

Switchboard, Phonogram No. 5 is is a modular switchboard, consisting of two 12 inch long panel units whilst the Switchboard, Phonogram No. 6 consists of five 12 inch long panel units.

The switchboard units are mounted on 6 inch stands which allow access to the conveyer belt would be fitted under the desk below the switchboards.

The desk is called a Desks, TL1414.

Drawings -  9435 (No. 5) and 9436 (No. 6).

Drawing - CD174 (Layout).

See E.I. Telegraphs, General P1040 for more information.