Is this the BSM Connector?

Drew All Messages By This Member #205087 I've been trying to find a BSM panel jack connector for a while now. Usually, it's the 012-0127-00 that the manual calls out. I had nearly given up. But I was visiting a friend of mine who owns a Collins R390A and he was showing me the features. I noticed the IF connector in the back looks just like the BSM connectors on the 7T11A, 7D14, Sampling heads, etc. When I started to search for this connector, it was much easier to find. Now I'm not a HAM myself, but he certainly is and I know what they are many here. So it's possible this is old news. But anyone looking:
Shaun M All Messages By This Member #205088 Fair Radio Sales is another source (at least until the end of June, 2024) for these connectors. Shaun M.
Drew All Messages By This Member #205089 Just went to track it down. That's the one! Thanks for the lead. I suppose they're not as rare as eBay made me think.
Richard Steedman All Messages By This Member #205099 A 'real' BSM plug looks like this: Back in 2020 I posted some photos of a hack BSM plug I'd made using BNC connectors: /g/TekScopes/album?id=256572 I'd be very interested if someone could confirm that a mini-BNC connector is compatible with a BSM socket.
搁别苍é别 All Messages By This Member #205104 Richard, I just checked my? TG501 trigger and it is an MB 2 lug connector( FYI there are 2 and 3 lug versions). This is the same connector that is used on R390A Radio. 搁别苍é别 toggle quoted message Show quoted text On 5/15/24 4:19 AM, Richard Steedman via groups.io wrote: A 'real' BSM plug looks like this: Back in 2020 I posted some photos of a hack BSM plug I'd made using BNC connectors: /g/TekScopes/album?id=256572 I'd be very interested if someone could confirm that a mini-BNC connector is compatible with a BSM socket.
n4buq All Messages By This Member #205105 Those are on the front of the 7D14 for the Reference Frequency connection and, yes, the MB connector from an R390A will fit it. Barry - N4BUQ toggle quoted message Show quoted text Richard, I just checked my? TG501 trigger and it is an MB 2 lug connector( FYI there are 2 and 3 lug versions). This is the same connector that is used on R390A Radio. 搁别苍é别 On 5/15/24 4:19 AM, Richard Steedman via groups.io wrote: A 'real' BSM plug looks like this: Back in 2020 I posted some photos of a hack BSM plug I'd made using BNC connectors: /g/TekScopes/album?id=256572 I'd be very interested if someone could confirm that a mini-BNC connector is compatible with a BSM socket.
Shaun M All Messages By This Member #205107 The ones I purchased from Fair Radio were "cut offs", but were easily be reworked to whatever was required: For example converting the S-52 pre-trigger output to BNC or SMA. I originally bought them to replace missing or damaged connectors on the R390A receiver. Shaun M.
Greg Muir All Messages By This Member #205108 You might try this: Back in the 70’s I received an Ampex 24 channel instrumentation recorder in a 7 foot rack from NASA where all of the channel modules had the same jacks. If I can recall they were termed “MB” connectors by Amphenol RF. Along with the recorder came a big box of cables terminated in the plugs as well a box full of new plugs. Unfortunately the recorder was transferred to another concern along with all of the accessories. I don’t believe that mini BNC connectors will mate. In addition mini BNC connectors were primarily designed for the 75 ohm market and are used in video applications. Greg
Daniel Nelson All Messages By This Member #205113 Hi all.... The MB connector is a reverse gender connector. The panel mounted one usually has a male pin in the center while the cable mounted one has a female pin with a long teflon insulator around it. I would bet that NO BNC connector of any stripe will mate. Amphenl made adapters for these. You probably can look them up or find them around: 33200 BNC Jack to MB Jack - Panel Mount - 4 hole flange 37200 BNC Jack to MB Jack - Panel Mount - 1 hole 'D' 47250 BNC Jack to MB Plug - Not mounted - This the one I needed as it makes an MB connector on the panel into a BNC Female with a snap on adapter 47275 BNC Plug to MB Jack - Not mounted - Would be good to take an MB cable and make it into BNC ends with an adapter. Hope this helps Dan in Chandler, AZ
EB4APL All Messages By This Member #205123 Hi, When I bought a 067-0587-01 Calibration Fixture I thought to replace the BM socket at the trigger out with a mini BNC but fortunately I located some NOS in sealed bags that where pristine. The manufacturer was Automatic metal products corp. The markings are 94375? RF 0721? 1 1. At a first glace they look like Mini BNC but the pin gender is reversed. A picture is here: /g/TekScopes/photo/295102/3783329?p=Name%2C%2C%2C20%2C1%2C0%2C0 Ignacio toggle quoted message Show quoted text El 16/05/2024 a las 2:59, Daniel Nelson via groups.io escribió: Hi all.... The MB connector is a reverse gender connector. The panel mounted one usually has a male pin in the center while the cable mounted one has a female pin with a long teflon insulator around it. I would bet that NO BNC connector of any stripe will mate. Amphenl made adapters for these. You probably can look them up or find them around: 33200 BNC Jack to MB Jack - Panel Mount - 4 hole flange 37200 BNC Jack to MB Jack - Panel Mount - 1 hole 'D' 47250 BNC Jack to MB Plug - Not mounted - This the one I needed as it makes an MB connector on the panel into a BNC Female with a snap on adapter 47275 BNC Plug to MB Jack - Not mounted - Would be good to take an MB cable and make it into BNC ends with an adapter. Hope this helps Dan in Chandler, AZ -- Este correo electrónico ha sido analizado en busca de virus por el software antivirus de Avast. www.avast.com
ed breya All Messages By This Member #205125 Years ago I started changing any and all BSM connectors I encountered (mostly on Tek S-5X sampling head family) to SMA, so future compatibility is good. I think there may be a couple of heads and other items still needing the changeover when I eventually fool around with them again, but they will definitely be done at some point. It's very easy to do if you have the right parts on hand, and you'll never have to look back (except for talking about it, like now). Ed
搁别苍é别 All Messages By This Member #205126 Ed- I like that idea....I have MB stuff, but......the sma or even smb is a whole lot better......it is now on my to do list. 搁别苍é别 toggle quoted message Show quoted text On 5/16/24 9:00 PM, ed breya via groups.io wrote: Years ago I started changing any and all BSM connectors I encountered (mostly on Tek S-5X sampling head family) to SMA, so future compatibility is good. I think there may be a couple of heads and other items still needing the changeover when I eventually fool around with them again, but they will definitely be done at some point. It's very easy to do if you have the right parts on hand, and you'll never have to look back (except for talking about it, like now). Ed
ed breya All Messages By This Member #205127 SMB would be better - more compact out front especially - but the mounting hole is typically around 3/16" D I think, while the BSM and SMA holes are around 1/4", so an easier direct drop-in fit. SMB would work if you can find some with 1/4" D shanks, or have some kind of bushings or such to adapt to the hole, but then the shank length has to be enough to handle the extra hardware thickness. Ed

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Is this the BSM Connector?