STD Jack....but smaller - UK Vintage Radio Repair and Restoration Discussion Forum

sunthaiboy · 9th Mar 2018, 8:19 pm

Hi Guys,

I have acquired a 1959-61 vintage R&S receiver. It appears to have a headphone jack socket. I thought it was a standard dual-pole 6.35mm/1/4" jack type, but it's smaller dia. approx. 5.05mm and slightly shorter. Typical of the Germans to have something special-to-type.

Has anyone come across a jack connector of this type. If yes please get in contact with me. I have turned one up on a lathe, but need a second.
Thanks

cmjones01 · 9th Mar 2018, 8:25 pm

Sounds like it could be a 'bantam' size (3/16" I think) jack.

Chris

sunthaiboy · 9th Mar 2018, 8:39 pm

Alas Chris, I don't think its a Bantam. They are 4.4mm dia. I may try one....or possibly slide a 4.5mm drill in the hole see if it make suitable contact.

Dave Moll · 9th Mar 2018, 8:40 pm

I don't suppose this uses a telephone jack - as shown below - does it?

The diameter of this does measure just over 5mm.

G6Tanuki · 9th Mar 2018, 8:50 pm

I suspect it's a "316" socket; these were used extensively on telephone and communications-equipment from the 1940s onwards. I've got a bunch of WWII-era ones here, all marked with the "Air Ministry" A[crown]M logo.

Ted Kendall · 9th Mar 2018, 9:01 pm

No, bantam came a lot later, This was a connector used by Grundig on the 500/700 tape recorders and also by Philips, fell out of use by 1960 and was unavailable by 1965-ish - an article in Tape Recorder refers. Lots of luck or back to the lathe, I fear...

sunthaiboy · 9th Mar 2018, 10:23 pm

I think it might be a PJ-068 jack (certainly dia wise), but the PJ-068 is a 3-pole mike jack (which might do the job). The one I need is 2-pole speaker/keying jack looking at the socket. I include a photo of a NP3TB-R and my build effort.
Thanks for your replies

9th Mar 2018, 8:19 pm	#1
sunthaiboy Retired Dormant Member Join Date: Jun 2011 Location: Crew Green, Powys, Wales, UK. Posts: 68	STD Jack....but smaller Hi Guys, I have acquired a 1959-61 vintage R&S receiver. It appears to have a headphone jack socket. I thought it was a standard dual-pole 6.35mm/1/4" jack type, but it's smaller dia. approx. 5.05mm and slightly shorter. Typical of the Germans to have something special-to-type. Has anyone come across a jack connector of this type. If yes please get in contact with me. I have turned one up on a lathe, but need a second. Thanks

9th Mar 2018, 8:25 pm	#2
cmjones01 Nonode Join Date: Oct 2008 Location: Warsaw, Poland and Cambridge, UK Posts: 2,677	Re: STD Jack....but smaller Sounds like it could be a 'bantam' size (3/16" I think) jack. Chris __________________ What's going on in the workshop? http://martin-jones.com/

9th Mar 2018, 8:39 pm	#3
sunthaiboy Retired Dormant Member Join Date: Jun 2011 Location: Crew Green, Powys, Wales, UK. Posts: 68	Re: STD Jack....but smaller Alas Chris, I don't think its a Bantam. They are 4.4mm dia. I may try one....or possibly slide a 4.5mm drill in the hole see if it make suitable contact.

9th Mar 2018, 8:40 pm	#4
Dave Moll Dekatron Join Date: Feb 2005 Location: West Cumbria (CA13), UK Posts: 6,127	Re: STD Jack....but smaller I don't suppose this uses a telephone jack - as shown below - does it? The diameter of this does measure just over 5mm. Attached Thumbnails __________________ Mending is better than Ending (cf Brave New World by Aldous Huxley) Last edited by Dave Moll; 9th Mar 2018 at 8:46 pm. Reason: added diameter

9th Mar 2018, 8:50 pm	#5
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 13,998	Re: STD Jack....but smaller I suspect it's a "316" socket; these were used extensively on telephone and communications-equipment from the 1940s onwards. I've got a bunch of WWII-era ones here, all marked with the "Air Ministry" A[crown]M logo.

9th Mar 2018, 9:01 pm	#6
Ted Kendall Dekatron Join Date: Jul 2008 Location: Kington, Herefordshire, UK. Posts: 3,671	Re: STD Jack....but smaller No, bantam came a lot later, This was a connector used by Grundig on the 500/700 tape recorders and also by Philips, fell out of use by 1960 and was unavailable by 1965-ish - an article in Tape Recorder refers. Lots of luck or back to the lathe, I fear...

9th Mar 2018, 10:23 pm	#7
sunthaiboy Retired Dormant Member Join Date: Jun 2011 Location: Crew Green, Powys, Wales, UK. Posts: 68	Re: STD Jack....but smaller I think it might be a PJ-068 jack (certainly dia wise), but the PJ-068 is a 3-pole mike jack (which might do the job). The one I need is 2-pole speaker/keying jack looking at the socket. I include a photo of a NP3TB-R and my build effort. Thanks for your replies Attached Thumbnails