Cold War Sites

GPO PR1 Protected Repeater Station
 Created 21-10-2001   Last update 05-02-2020

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If you can improve on the narrative that accompanies the following photos then please email me.
 
 
Equipment racks

 

029 - Equipment racks.

 
 
 
 
Equipment racks.

037 - A Group Distribution Frame. Each 12 channel group was cross connected to its required Super Group. It is also a test point where signals could be sent.
 
 
 
Equipment racks

 

039 - Equipment racks.

 
 
 
 
Equipment racks

 

040 - '51 type' racks. These used both valve and transistor equipment.

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NEW - 19-01-2013

I worked in repeater stations in the 1960s and 1970s. The 51 type equipment did not use transistors as you state, it was all valve based with soldered in valves. Transistors were in 56 type which was overall very similar to 51 type but also has a half size shelf (17/8" from memory). The 56 type used germanium transistors as well as valves for some functions.
All the best for your excellent site.

Graeme Marett January, 2013
 
 
 
Equipment racks

 

044 - Equipment racks..

 
 
 
 
 Equipment racks.

 

048 - Equipment racks.

 
 
 

  The following are extracts from e-mails received:

 
 

..I worked in the GPO PRI repeater station. The equipment was all below ground and there was an emergency switchboard, drinking water tanks and bunk beds in a separate area. The air conditioning also kept the air pressure above that of the outside.

Brian Wells (BT engineer retired) - 14 February 2004

  
 
 
 

   Three years behind you, I joined the then PO telephones in Manchester in 1966.

   I worked for five years in MR/Guardian TRS (150 feet belowGeorge St) before moving to MR/G TRS, a PR1 in Stockport. I am astounded by your pics... the fact that everything in them is absolutely identical with MR/G right down to the Pegelmesser SLMS stood behind the STC one. The only apparent difference is that our MATEs (both in Guardian and MR/G) were ‘single deck’ versions, ie. just one row of keys.
   I wish I had had the good sense to take pics before I left.
Your pics and text have stirred a lot of good memories for me. Thank you very much.

Paul Hodkinson - February 2020

  
 
 

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