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Old 27th Mar 2020, 2:04 pm   #6
TonyDuell
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Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,191
Default Re: GPO/BPO 620 plug, 6 way

I've attached a photo of my 6 pole plug and socket. The socket has 'RS' on the fixing bush (obviously not visible in the photo) so that's where it must have come from.

I have also got the November 1992-Februrary 1993 RS catalogue to hand. It lists the following 'BT Type Jack Connectors' :

4 way plug (BT 420) 478-677
4 way socket (BT 84A) 478-683
6 way plug (BT 620) 478-712
6 way socket (-) 478-728

It's interesting that the socket has no BT reference number given (although the plug does).
Attached Thumbnails
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