CR100 receiver coaxial connector - UK Vintage Radio Repair and Restoration Discussion Forum

Andrew Sinclair · 30th Mar 2023, 9:23 am

Apologies if this has been covered previously, but does anybody know the name of the coaxial plugs used in some versions of the CR100 series receivers?
I am restoring a CR150 which uses the same connector.
There are two versions, one has the outer thread shown in my pictures, and is marked 10H/185.
The other version does not have the thread and is marked 10H/10330.
The spit centre pin has a 4.5mm hole. The screen/sleeve has a diameter of 15.8mm.
The CR150/3 manual has calls the plug "type 160" and the socket "type 161". I think the 160 is fitted to the cable.
The Marconi part number for the socket is W6015A/226 and the plug W6015A/227.
They must have made thousands of these connectors. Can anyone tell me where I could buy one?

Station X · 30th Mar 2023, 9:38 am

Musa connector?

https://en.wikipedia.org/wiki/Musa_connector

Jon_G4MDC · 30th Mar 2023, 9:52 am

It's bigger than Musa IIRC.

My CR100 had one but I just used a banana plug in the inner. I once fitted UR67 using a jubilee clip to clamp the braid around the outer. It was a pointless exercise but had to be tried in my SWL days.

Andrew Sinclair · 30th Mar 2023, 2:32 pm

It is much bigger than a MUSA connector.

trh01uk · 30th Mar 2023, 2:35 pm

What you have is a standard RAF coax socket, as used on various RAF gear, plus the british army R208 receiver - and apparently the CR100 as well. I think it was mostly fitted to post-war RAF gear, because a lot of the radar kit used Pye plugs. The T1509 transmitter has one, and that's post-war.

The matching plug is - from memory - 10H/184. I thought I had one to hand, but I don't so I can't check it. I can't see any on the usual auction site either - but they do appear (I've sold them there myself). If I find any lying about here, I will PM you.

Richard

Andrew Sinclair · 30th Mar 2023, 3:00 pm

That gives me some clues.
Thanks Richard.

trh01uk · 30th Mar 2023, 3:20 pm

Quote:

Originally Posted by Andrew Sinclair

That gives me some clues.
Thanks Richard.

Andrew,

the plugs are quite distinctive, so you will probably recognise it when you see one. They have a big rubber strain relief, which is around half the length of the entire connector. And they are big of course, compared to BNC, Belling-LEE, Type N, etc!

Richard

M0FYA Andy · 30th Mar 2023, 6:14 pm

I believe the Plug Type 784 as shown in ebay item 274818140929 will also suit.

Andy

G6Tanuki · 30th Mar 2023, 6:21 pm

Wasn't something very similar [and large?] used on pre-WWII EMI TV sets?

trh01uk · 30th Mar 2023, 6:52 pm

Quote:

Originally Posted by M0FYA Andy

I believe the Plug Type 784 as shown in ebay item 274818140929 will also suit.

Andy

Yes, I think that's the correct plug. There's also a right angle version available.

Richard

Andrew Sinclair · 30th Mar 2023, 9:01 pm

Nice to see what they look like.
A right angled version would be particularly useful to save space at the back of the set.

QQVO6/40 · 31st Mar 2023, 11:42 am

Greetings all.

Those connectors might be able to work with a General Radio Type 874 hermaphrodite connector.
Just wondering that's all.
I have both CR-150 and CR-100 receivers as well as a B 29 VLF receiver.
Well down the refurbishment list and not easy to get to at this stage so I am not sure about the suitability of the General Radio connector for this task.

Just thinking that all.

Robert,, VK2BNM.

trh01uk · 31st Mar 2023, 2:06 pm

Andrew,

I haven't found the loose plugs (that I know I have), but I have found some cables with the plugs on. Happy to sell you any or all of them. You will be spoilt for choice, as you can have the right angle and the straight, with or without locking rings.

See photos for what I have. The long cable is 1.5m long, and the plug on the other end is a type CZ71054 (probably not of interest!). The right angle plugs are marked 10H/178

Just to be sure these are the correct plugs, the inside diameter of the outer on the plugs is 14.8 to 15.4mm, and the outside diameter of the inner pin on the plugs is 5mm.

I suggest a fiver per cable - to include postage.

Richard

Andrew Sinclair · 31st Mar 2023, 7:33 pm

Those look like the correct connector. Thanks very much for looking them out Richard.
I was beginning to think I needed to get the lathe going...
I am heavily restoring a CR150 with re-stuffed capacitors etc and didn't want to fit a modern type if possible.
I would like all three cables please. I will send you a PM.

trh01uk · 31st Mar 2023, 7:44 pm

If we looked through everyone's junk boxes, we would find a myriad of coax connectors, many of which we would be unable to name - and most of those would be down to the RAF, who for some reason turned out all kinds of different connectors during the war years and postwar too. I suspect it was something to do with the rapidly advancing microwave techniques, which of course the RAF were spear-heading with their drive for ever better Radar systems.

Richard

bill knox · 6th Apr 2023, 6:32 pm

Hi

Is it the chassis fixing socket you are after or the plug that has the coax cable fitted

Bill

Andrew Sinclair · 6th Apr 2023, 8:00 pm

I am mainly after the cable plug. The chassis sockets on my receiver are a bit beaten up. If the set is put down on it's back the sockets take all the weight. The inner connector projects past the outer sleeve and is particularly vulnerable. So it would be nice to find a chassis socket too.

trh01uk · 7th Apr 2023, 7:09 pm

Andrew,

did you not receive the set of cable plugs that I sent over to you?

Richard

Andrew Sinclair · 8th Apr 2023, 7:41 pm

Richard,
Received the cables this morning. (I had to get them re-delivered as I missed the first delivery by a couple of minutes!)
The cable connectors fitted my chassis connectors perfectly, so thanks for digging these out.
So we can safely say we have identified the connector s on the CR150 and some versions of the CR100.
Coincidentally I visited the excellent and soon to close museum at RAF Henlow on Tuesday and saw the same connector on the RAF R1392 VHF ground station receiver.
Thanks for everybody's help.
Andrew

trh01uk · 8th Apr 2023, 9:59 pm

Andrew,

that's good. Glad to help.

I found a very strange thing while digging out your cables. I nearly sent you the wrong connectors! I have some American coaxial cables that look very similar to the ones I sent you - same size etc. But there was one key difference. If you look closely at the coax plugs I sent you - the RAF ones - they have a spring clip around the outside of the actual connection outer. That's because the outer of the plug fits outside the mating part on the socket.

These American plugs have the same spring clip, but they are inside the plug's outer connector. So these ones must fit inside the mating part on the socket. No idea what these are called......

Richard

30th Mar 2023, 9:23 am	#1
Andrew Sinclair Pentode Join Date: Sep 2007 Location: Fareham, Hampshire, UK. Posts: 106	CR100 receiver coaxial connector Apologies if this has been covered previously, but does anybody know the name of the coaxial plugs used in some versions of the CR100 series receivers? I am restoring a CR150 which uses the same connector. There are two versions, one has the outer thread shown in my pictures, and is marked 10H/185. The other version does not have the thread and is marked 10H/10330. The spit centre pin has a 4.5mm hole. The screen/sleeve has a diameter of 15.8mm. The CR150/3 manual has calls the plug "type 160" and the socket "type 161". I think the 160 is fitted to the cable. The Marconi part number for the socket is W6015A/226 and the plug W6015A/227. They must have made thousands of these connectors. Can anyone tell me where I could buy one? Attached Thumbnails

30th Mar 2023, 9:38 am	#2
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,289	Re: CR100 receiver coaxial connector Musa connector? https://en.wikipedia.org/wiki/Musa_connector __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

30th Mar 2023, 9:52 am	#3
Jon_G4MDC Nonode Join Date: Nov 2015 Location: Welwyn Garden City, Hertfordshire, UK. Posts: 2,015	Re: CR100 receiver coaxial connector It's bigger than Musa IIRC. My CR100 had one but I just used a banana plug in the inner. I once fitted UR67 using a jubilee clip to clamp the braid around the outer. It was a pointless exercise but had to be tried in my SWL days.

30th Mar 2023, 2:32 pm	#4
Andrew Sinclair Pentode Join Date: Sep 2007 Location: Fareham, Hampshire, UK. Posts: 106	Re: CR100 receiver coaxial connector It is much bigger than a MUSA connector.

30th Mar 2023, 2:35 pm	#5
trh01uk Octode Join Date: Nov 2010 Location: Ross-on-Wye, Herefordshire, UK. Posts: 1,654	Re: CR100 receiver coaxial connector What you have is a standard RAF coax socket, as used on various RAF gear, plus the british army R208 receiver - and apparently the CR100 as well. I think it was mostly fitted to post-war RAF gear, because a lot of the radar kit used Pye plugs. The T1509 transmitter has one, and that's post-war. The matching plug is - from memory - 10H/184. I thought I had one to hand, but I don't so I can't check it. I can't see any on the usual auction site either - but they do appear (I've sold them there myself). If I find any lying about here, I will PM you. Richard Last edited by trh01uk; 30th Mar 2023 at 2:42 pm.

30th Mar 2023, 3:00 pm	#6
Andrew Sinclair Pentode Join Date: Sep 2007 Location: Fareham, Hampshire, UK. Posts: 106	Re: CR100 receiver coaxial connector That gives me some clues. Thanks Richard.

30th Mar 2023, 6:14 pm	#8
M0FYA Andy Nonode Join Date: May 2007 Location: Preston, Lancashire, UK. Posts: 2,511	Re: CR100 receiver coaxial connector I believe the Plug Type 784 as shown in ebay item 274818140929 will also suit. Andy

30th Mar 2023, 6:21 pm	#9
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,007	Re: CR100 receiver coaxial connector Wasn't something very similar [and large?] used on pre-WWII EMI TV sets? __________________ I'm the Operator of my Pocket Calculator. -Kraftwerk.

30th Mar 2023, 9:01 pm	#11
Andrew Sinclair Pentode Join Date: Sep 2007 Location: Fareham, Hampshire, UK. Posts: 106	Re: CR100 receiver coaxial connector Nice to see what they look like. A right angled version would be particularly useful to save space at the back of the set.

31st Mar 2023, 11:42 am	#12
QQVO6/40 Hexode Join Date: May 2009 Location: Newcastle, Australia Posts: 321	Re: CR100 receiver coaxial connector Greetings all. Those connectors might be able to work with a General Radio Type 874 hermaphrodite connector. Just wondering that's all. I have both CR-150 and CR-100 receivers as well as a B 29 VLF receiver. Well down the refurbishment list and not easy to get to at this stage so I am not sure about the suitability of the General Radio connector for this task. Just thinking that all. Robert,, VK2BNM.

31st Mar 2023, 2:06 pm	#13
trh01uk Octode Join Date: Nov 2010 Location: Ross-on-Wye, Herefordshire, UK. Posts: 1,654	Re: CR100 receiver coaxial connector Andrew, I haven't found the loose plugs (that I know I have), but I have found some cables with the plugs on. Happy to sell you any or all of them. You will be spoilt for choice, as you can have the right angle and the straight, with or without locking rings. See photos for what I have. The long cable is 1.5m long, and the plug on the other end is a type CZ71054 (probably not of interest!). The right angle plugs are marked 10H/178 Just to be sure these are the correct plugs, the inside diameter of the outer on the plugs is 14.8 to 15.4mm, and the outside diameter of the inner pin on the plugs is 5mm. I suggest a fiver per cable - to include postage. Richard Attached Thumbnails

31st Mar 2023, 7:33 pm	#14
Andrew Sinclair Pentode Join Date: Sep 2007 Location: Fareham, Hampshire, UK. Posts: 106	Re: CR100 receiver coaxial connector Those look like the correct connector. Thanks very much for looking them out Richard. I was beginning to think I needed to get the lathe going... I am heavily restoring a CR150 with re-stuffed capacitors etc and didn't want to fit a modern type if possible. I would like all three cables please. I will send you a PM.

31st Mar 2023, 7:44 pm	#15
trh01uk Octode Join Date: Nov 2010 Location: Ross-on-Wye, Herefordshire, UK. Posts: 1,654	Re: CR100 receiver coaxial connector If we looked through everyone's junk boxes, we would find a myriad of coax connectors, many of which we would be unable to name - and most of those would be down to the RAF, who for some reason turned out all kinds of different connectors during the war years and postwar too. I suspect it was something to do with the rapidly advancing microwave techniques, which of course the RAF were spear-heading with their drive for ever better Radar systems. Richard

6th Apr 2023, 6:32 pm	#16
bill knox Hexode Join Date: Mar 2011 Location: Wilstead, Bedfordshire, UK. Posts: 367	Re: CR100 receiver coaxial connector Hi Is it the chassis fixing socket you are after or the plug that has the coax cable fitted Bill

6th Apr 2023, 8:00 pm	#17
Andrew Sinclair Pentode Join Date: Sep 2007 Location: Fareham, Hampshire, UK. Posts: 106	Re: CR100 receiver coaxial connector I am mainly after the cable plug. The chassis sockets on my receiver are a bit beaten up. If the set is put down on it's back the sockets take all the weight. The inner connector projects past the outer sleeve and is particularly vulnerable. So it would be nice to find a chassis socket too.

7th Apr 2023, 7:09 pm	#18
trh01uk Octode Join Date: Nov 2010 Location: Ross-on-Wye, Herefordshire, UK. Posts: 1,654	Re: CR100 receiver coaxial connector Andrew, did you not receive the set of cable plugs that I sent over to you? Richard

8th Apr 2023, 7:41 pm	#19
Andrew Sinclair Pentode Join Date: Sep 2007 Location: Fareham, Hampshire, UK. Posts: 106	Re: CR100 receiver coaxial connector Richard, Received the cables this morning. (I had to get them re-delivered as I missed the first delivery by a couple of minutes!) The cable connectors fitted my chassis connectors perfectly, so thanks for digging these out. So we can safely say we have identified the connector s on the CR150 and some versions of the CR100. Coincidentally I visited the excellent and soon to close museum at RAF Henlow on Tuesday and saw the same connector on the RAF R1392 VHF ground station receiver. Thanks for everybody's help. Andrew

8th Apr 2023, 9:59 pm	#20
trh01uk Octode Join Date: Nov 2010 Location: Ross-on-Wye, Herefordshire, UK. Posts: 1,654	Re: CR100 receiver coaxial connector Andrew, that's good. Glad to help. I found a very strange thing while digging out your cables. I nearly sent you the wrong connectors! I have some American coaxial cables that look very similar to the ones I sent you - same size etc. But there was one key difference. If you look closely at the coax plugs I sent you - the RAF ones - they have a spring clip around the outside of the actual connection outer. That's because the outer of the plug fits outside the mating part on the socket. These American plugs have the same spring clip, but they are inside the plug's outer connector. So these ones must fit inside the mating part on the socket. No idea what these are called...... Richard