10-03-2016, 06:26 PM
I have 1000s of assorted BNC connectors. Including various kinds of NOS PCB mount sockets, round and square panel mount sockets. Crimp and conventional plugs. I agree that conventional BNC plugs are fiddly. I must have wired many hundreds of them over the years. Stripping dimensions are critical for both crimp and conventional types. I have a rotary stripper somewhere which you can set to get it right every time. Whether or not you use a rotary stripper you need to practice a few times with a bit of spare cable until you're sure you've got it right.
Crimp plugs are critically sized to the cable. Conventional ones are a little more forgiving. For example old fashioned URM202 aerial downlead will fit a URM70 plug with no trouble at all. haven't tried it but I expect CT100 satellite cable would fit a plug for PSF1/3 (That's an old BBC spec for video grade co-ax)
Most of the plugs I have are 75 ohm types for URM70 and the slightly thicker PSF1/3. I have a good quality crimp tool for URM70 which sort of works for PSF1/3. I also have loads of barrels (female back to back adaptors) and T pieces. So if anyone needs some BNC bits I can probably supply them for a Museum donation.
The subject of 50R and 75R BNCs is controversial. According to manufacturer's data from Amphenol and others the 2 types will freely interconnect without harm. Others say that the 50R plugs have a thicker centre pin which can stretch 75R sockets to the pint where they are no longer reliable with 75R plugs.
Crimp plugs are critically sized to the cable. Conventional ones are a little more forgiving. For example old fashioned URM202 aerial downlead will fit a URM70 plug with no trouble at all. haven't tried it but I expect CT100 satellite cable would fit a plug for PSF1/3 (That's an old BBC spec for video grade co-ax)
Most of the plugs I have are 75 ohm types for URM70 and the slightly thicker PSF1/3. I have a good quality crimp tool for URM70 which sort of works for PSF1/3. I also have loads of barrels (female back to back adaptors) and T pieces. So if anyone needs some BNC bits I can probably supply them for a Museum donation.
The subject of 50R and 75R BNCs is controversial. According to manufacturer's data from Amphenol and others the 2 types will freely interconnect without harm. Others say that the 50R plugs have a thicker centre pin which can stretch 75R sockets to the pint where they are no longer reliable with 75R plugs.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
