POST P.A. No. 1

The Post P.A. No. 1 was introduced to the UK around 1933 and were used on the P.A. 101, 150, 150TD and 150MP schemes.  They were made by Ericsson and would be part of a Police system that was installed around a Town.  In the Police Station there would have been a switchboard and the Posts were wired away to strategic positions.  Phones could also be wired off these posts and could be inside premises as subsidiary phones as well.  These strategic positions were on corners and in places were a person had a good view of the Post and a Policeman could see the light flashing.

The Post is made of Cast Iron and had a triangular head.  The head has three doors:

  1. Public door - Sprung loaded so it shut after use.  Inside this door was a loudspeaker, with a microphone placed in the middle, covered by a metal grill.  The door had a pin which located on a switch.  Whist the door was open, the light on the top of the Post would be illuminated, so that patrolling Policemen could see that the post was in use and can to assist.
  2. Police door - Fixed by means of a Yale type lock, the Police had their own telephone for speaking to the station in this compartment.  The door had a writing table fitted to it.
  3. Engineers door - Fixed by means of triangular bolts, which would be removed by the use of a Keys, Pillar.  Through this aperture the whole mechanism could be removed.

There are two other doors:

  1. Electrical Intake - this door is on the enlarged foot of the post and is fixed with triangular bolts.  It houses a mains fuse box.
  2. First Aid - this door located in the body of the post itself and holds first aid equipment for public use.

Most Posts were withdrawn in the early 1960's as the Police changed over to radio communication, or replaced by the PA450 system in the 1950's.

Go to the PA150 page for an overview of the complete system.

Produced by Ericsson - see N20026.

Post Pa No. 1 showing the first aid compartment (on the post).  The door on the top left is the locked Police door and the top right hand door is for the public.
(Picture taken in St. Albans in 1935)


Engineers door open.  The side of the Police phone is showing to the right.
(Picture taken in St. Albans in 1935)
Engineer working on a post
(Picture taken in St. Albans in 1935)
Member of the public making a public call
(Picture taken in St. Albans in 1935)

Click here for more information on Posts

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Last revised: October 05, 2019