What is it? Can someone kindly identify this mains socket on an HP sig. generator - UK Vintage Radio Repair and Restoration Discussion Forum

Anthony · 10th Jul 2013, 9:54 pm

Could some kind person identify this mains socket from a 1960s HP signal generator (HP620B) (.doc file attached with 2 views). The socket differs from that shown in any of the manuals for this model I have access to. The diameter of the metal threaded section is approximately 3/4 inch. I would much prefer not to replace it. All suggestions gratefully received. Of course it is the plug I am after.
Thank you,
Anthony

Radio Wrangler · 10th Jul 2013, 10:22 pm

I can't remember the proper name of it, it's just the round plessey connector that was insisted on in some military contracts. I have a 140 scope mainframe with one on the front... but no mains lead to go with it.

David

ronbryan · 10th Jul 2013, 11:54 pm

It's a 3 pole Plessey Mk4 aluminium connector, otherwise known as a Pattern 104.

There is a thread here showing a picture of the cable mounted 'plug' (with socket contacts).

https://www.vintage-radio.net/forum/...d.php?p=614234

Ron

maninashed · 11th Jul 2013, 12:33 am

Its a three pole Plessey military connector, also used on a lot of ex MOD items incl Cossor etc. Getting quite hard to come by, when you need one.

Anthony · 11th Jul 2013, 7:24 am

Thank you very much. As usual everyone except me is very knowledgeable. Now all I have to do is to find one.
Anthony

1954Fender · 11th Jul 2013, 7:28 am

ronbryan's earlier post is on the money. "Electrojumble" has a good selection of Plessey connectors.

Take care with the orientation of the plugs. I have no connection with Electrojumble other than a satisfied customer, he is most helpful and quick.

Anthony · 11th Jul 2013, 3:27 pm

Again, thank you all; Electrojumble do seem to have it.

dseymo1 · 11th Jul 2013, 4:50 pm

Be aware, too, that the orientation of the insert can be changed with respect to the keyed shell, which requires a special spanner, although you may be able to improvise if necessary.

Sean Williams · 11th Jul 2013, 5:04 pm

If you wanted one that was a bit more local you could ask me......

Anthony · 11th Jul 2013, 5:05 pm

Electrojumble have offered to do this for me against my picture of the male socket. I too have no commercial interest in them but Roy Johnson has been amazingly helpful.

Anthony · 11th Jul 2013, 5:06 pm

Sean
Very kind of you to offer - next time!
Anthony

glowinganode · 11th Jul 2013, 10:33 pm

Quote:

Originally Posted by dseymo1

...which requires a special spanner, although you may be able to improvise if necessary.

I use a pair of thin screwdrivers and an adjustable spanner.
Note the later Plessey Mk7 which look similar but have a green insert have fixed orientation and cannot be adjusted.
Rob.

10th Jul 2013, 10:22 pm	#2
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,894	Re: What is it? Can someone kindly identify this mains socket on an HP sig. generator I can't remember the proper name of it, it's just the round plessey connector that was insisted on in some military contracts. I have a 140 scope mainframe with one on the front... but no mains lead to go with it. David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done

10th Jul 2013, 11:54 pm	#3
ronbryan Octode Join Date: Jan 2003 Location: Guildford, Surrey, UK. Posts: 1,960	Re: What is it? Can someone kindly identify this mains socket on an HP sig. generator It's a 3 pole Plessey Mk4 aluminium connector, otherwise known as a Pattern 104. There is a thread here showing a picture of the cable mounted 'plug' (with socket contacts). https://www.vintage-radio.net/forum/...d.php?p=614234 Ron

11th Jul 2013, 12:33 am	#4
maninashed Rest in Peace Join Date: May 2011 Location: Preston, Lancashire UK Posts: 955	Re: What is it? Can someone kindly identify this mains socket on an HP sig. generator Its a three pole Plessey military connector, also used on a lot of ex MOD items incl Cossor etc. Getting quite hard to come by, when you need one.

11th Jul 2013, 7:24 am	#5
Anthony Hexode Join Date: Sep 2006 Location: Hertford, Herts. UK. Posts: 338	Re: What is it? Can someone kindly identify this mains socket on an HP sig. generator Thank you very much. As usual everyone except me is very knowledgeable. Now all I have to do is to find one. Anthony

11th Jul 2013, 7:28 am	#6
1954Fender Triode Join Date: Aug 2009 Location: Devon, UK. Posts: 23	Re: What is it? Can someone kindly identify this mains socket on an HP sig. generator ronbryan's earlier post is on the money. "Electrojumble" has a good selection of Plessey connectors. Take care with the orientation of the plugs. I have no connection with Electrojumble other than a satisfied customer, he is most helpful and quick.

11th Jul 2013, 3:27 pm	#7
Anthony Hexode Join Date: Sep 2006 Location: Hertford, Herts. UK. Posts: 338	Re: What is it? Can someone kindly identify this mains socket on an HP sig. generator Again, thank you all; Electrojumble do seem to have it.

11th Jul 2013, 4:50 pm	#8
dseymo1 Retired Dormant Member Join Date: Dec 2007 Location: Shropshire, UK. Posts: 3,051	Re: What is it? Can someone kindly identify this mains socket on an HP sig. generator Be aware, too, that the orientation of the insert can be changed with respect to the keyed shell, which requires a special spanner, although you may be able to improvise if necessary.

11th Jul 2013, 5:04 pm	#9
Sean Williams Dekatron Join Date: Feb 2005 Location: St.Ippolyts, Hitchin, Hertfordshire QRA IO91UW Posts: 3,518	Re: What is it? Can someone kindly identify this mains socket on an HP sig. generator If you wanted one that was a bit more local you could ask me...... __________________ Engineers make things work and have spare bits when finished

11th Jul 2013, 5:05 pm	#10
Anthony Hexode Join Date: Sep 2006 Location: Hertford, Herts. UK. Posts: 338	Re: What is it? Can someone kindly identify this mains socket on an HP sig. generator Electrojumble have offered to do this for me against my picture of the male socket. I too have no commercial interest in them but Roy Johnson has been amazingly helpful.

11th Jul 2013, 5:06 pm	#11
Anthony Hexode Join Date: Sep 2006 Location: Hertford, Herts. UK. Posts: 338	Re: What is it? Can someone kindly identify this mains socket on an HP sig. generator Sean Very kind of you to offer - next time! Anthony