Electronics > Beginners
How to attach an RCA connector to a chassis ?
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langwadt:

--- Quote from: coppercone2 on October 03, 2018, 02:01:32 pm ---it was temperamental and I got up on a chair to mess with it and boom. Probably got nudged because you know, you need to move home AV equipment to clean the dust under it *unless your a dirty fuck*

Never would have happened with BNC. Obviously people won't have it so poorly set up but the fact is the equipment needs to be moved once in a while to clean behind, under it, etc, unless its part of a sterile AV rack mount device.

There is like a 100% chance some house wife is going to be regularly messing with some kind of home audio setup to find dust during regular cleaning. Maybe some people will have a filtered AV cabinet under their TV with some fan and filters to change, but I never saw that.

--- End quote ---

I think it is much more common that messing with the cables behind home audio is something that might happen once per decade
Bassman59:

--- Quote from: coppercone2 on October 02, 2018, 03:44:04 pm ---well the design also allows you to zap the center conductor with ESD easily. especially in a shagged out audio room.

same problem with the audio connectors.

everyone so mad, god guys, buyers remorse from 20 years ago? everything is optical now for good reason. war's over people, japan surrendered in the 40's, no point defending this jungle anymore

--- End quote ---

All audio gear should use balanced connections on XLR. None of this RCA stuff. I demand that all consumer audio manufacturers switch over immediately. Also, Pin 2 hot.

{waiting forever}
Richard Crowley:

--- Quote from: coppercone2 on October 01, 2018, 10:50:22 pm ---to be specific, i never noticed that much of a problem with BNC, i found even crusty old ones worked fine, but always a decent brand

--- End quote ---
Wow, what great good luck you have had.

I have had 10x (or perhaps 100x) as much trouble with BNC as I ever had with RCA.
Yes, RCA are big, clunky, crude, etc.  But that makes them much more easily repairable in the field when a million-dollar production is on the line.

OTOH, I wish I had a buck for every flaky BNC connector I have had to deal with in the heat of battle.
They are small, fiddly, fragile, and ill-suited for field production.  But, alas, there is no reasonable substitute and virtually 100% of modern digital video gear uses them.  Of course, digital video (HD-SDI) uses the 75 ohm version of BNC which makes especially the female connector extremely fragile.

I try to keep "disposable/consumable" 90-degree angle fittings on my cameras, etc just to save the fragile BNC connector. But ignorant "help" doesn't know any better.  Perhaps I can super-glue the disposable adapter onto the camera to protect the fragile camera BNC connector.  I would be quite happy if I never had to deal with another BNC.
coppercone2:
What do you consider a BNC fail? The worst I had were with ancient function generators, the BNC from the 1960's or whatever looked really chowdered, but in the end they still seemed to work pretty well even when wiggled at low signal levels (I did not wanna take stuff apart).. I don't think I ever ended up replacing any of them on old test equipment I bought on ebay, though when badly tarnished and stuff I expect them to have bad HF performance in the high MHz.

The only BNC problem I noticed was with no-name BNC adapters meant for computer connectors ( 10BASE2 or whatever the network standard that used BNC was). But I played with them ALOT when I was a kid.. but I just made a rule if it does not have Pamona or such written on it I throw it out. The no-name BNC splitters are HORRID, but that is to be expected IMO. But I abused the hell out of them, because they were kinda fun to mess with because they formed rotary locked joints. Also the fact that I had them as a kid meant that they were recovered from a dumpster.

RCA was a completely different story, perfectly fine connectors connected to things like cameras, TV attachments would often require maintenance for no good reason


If you want a kinda permament but not really mounting for BNC then consider using Loctite. Purple would be recommended. I tried this before with a BNC and it kinda held a bit better, but it was still easy to twist off once you gave it a bit of force, but it certainly feels stuck compared to what your used to.
Richard Crowley:
I consider intermittent or COMPLETE absence of the signal to be a "BNC failure".
The cause is typically the female center contact deforming so that it doesn't make contact anymore.
So I have to go in VERY CAREFULLY and bend the contact segments back toward the center to make contact with the male pin.
My great fear is that one of these days the female center pin contacts will just snap off and I will have a completely useless $10K video camera sitting there.

I am thinking of very carefully putting a piece of heat-shrink tubing over the exposed female contact to keep it from so easily deforming.
But, of course that will throw off the impedance.  But maybe not enough to destabilize the link.
And it could interfere with mating with 50-ohm male connectors.  What a mess.
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