Ring back memories with an old Bakelite telephone For Spare Parts Click Here For Repairs and Conversions Click Here All telephones are available to buy by mail order
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200 Series Telephone
General Information My 200 series telephones are converted ready for use. They have a modern microphone fitted. They include either the correct bell set (see technical information below), or a later replacement, cabled to them. The regular type 232 is supplied either with a type 26 bell set attached to the base, or a type 64d bell set on the end of about 2 metres of cord. Historical Information Telephones with the same general shape as the 232 first appeared around 1928. These were the 160 series designed by Siemens Brothers of Woolwich London. Once the design had settled down in the late 1920's production was extended to other manufacturers as a standard pattern. The 162 and 232 differed internally and had slight
external differences. Early examples did not have a drawer in the base.
The confusingly designated 311, 354, and 366 wall telephones are
included in this section as the design dates back to 1931. The type
numbers were issued by Siemens Brothers of London for a series that was
not used by the GPO. The design was in my opinion more advanced than the
telephones being used by the GPO at that time. Generally the 311 was the
wall equivalent of the 232 telephone and 26 bell set combination. The
354 was for use on very long lines, both were pre-war models. The 366 the
post-war replacement for both. Technical Information The handset design was based on current American
practice and thoughts. The big step forward was the improved microphone
capsule developed especially for the telephone. This microphone had to
work at any handset angle without degradation and give consistent
performance. It was used with only minor improvements throughout the
life of the telephone. The other advance was the use of an ASTIC coil (Anti Side Tone Induction Coil). This was fitted inside the 162. Its purpose was to reduce the volume of the speakers voice as heard in the receiver, technically called side tone. This effect is generally described by the public as echo. For various reasons it is desirable to maintain side tone at an optimum level. The candlestick telephone without side tone control had excessive side tone. The 162 was intended as a replacement for the
Candlestick telephone + No 1 wooden bell set combination, so it was convenient to
re-use the existing type 1 bell set.
This housed the line matching transformer, as well as the bell parts. A
matching Bakelite, electrically similar bell set type 25 was also created for
this telephone.
In 1934 the 232 and its variants were introduced. They were
superficially the same as the 162, but they contained a combined ASTIC
and line matching transformer in the telephone. This meant a simplified
and cheaper bell set could be used. The Bakelite type 26 bell set or the
wooden type 1a bell set was used. The familiar drawer in
base also began to appear.
The 232 was produced in the Mark 1 and Mark 2 editions. The main
differences were in the design of the line matching transformer and
the slight re-arrangement of the internal terminal layout.
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Click here to see the Battlesbridge Antiques Centre web site Credit/Debit Cards are the preferred method of payment. I no longer accept cheques.If you wish to place an order, or have an enquiry, please read all below. Please call me (Gavin Payne) by telephone if you wish to place an order for a telephone, spare parts, or have an enquiry. I can usually be reached 9.00am to 5.45pm any day, including weekends. Calls in the evening are not appreciated and could make me very grumpy. The number is 01245 400601. I am in the shop most Saturday and Sunday mornings between 10.00 and 12.00. These are the only times I am in the shop for the sale of spare parts, conversions and repairs. Conversions and repairs can often be carried out while you wait. If you have a telephone that you want to know more about, or
have it
repaired or converted, please have it right next to you when you call.
Please also have a selection of small flat bladed screwdrivers to hand. Emails to gp@theoldtelephone.co.uk or copy and paste gp@theoldtelephone.co.uk into your email programme or app . By post to
The Old Telephone Company, The Old Granary, Battlesbridge
Antiques Centre, The Old Telephone Company respects your
privacy, and will not divulge any information about you to a third party.
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