Discussion in 'Cables & Switches' started by steve 111, May 16, 2004.
What's the difference between an RCA component cable and a BNC component cable?
BNC is better :grin;
But seriously, it is. BNC's are professional connections designed from the ground up for performance, the connection is good, the impedence is good...... as compared, RCA's were used for something easy and quick when BNC's werent available. I now always go for BNC is I can.
So will all input and output devices accept BNC or RCA, or do the actual binding posts differ?
the posts differ im afraid..... higher end devices will sometimes use BNC connections and this is definitely the case with video connections (ref. Lumagen visionproHDP which uses all bncs). Of course if you were really keen it probably wouldnt be so hard to change rca's for bnc's.....
A top quality BNC connector such as those made by Canare will be the correct 75 Ohm impedence required for a video signal. Cables from www.bluejeanscable.com use Canares crimped on Belden cable.
Just a little further clarification. For (non-balanced) digital and video interconnects, 75ohm termination is important - it stops signal reflections from the termination points bouncing around inside the cable and the inevitable signal degradation resulting from that. (Good) BNC connectors are spot on 75ohm - they were designed to be so. From what I've read on this forum (see the Beekeepers sticky post), 75ohm is actually impossible with RCA phonos due to the physical size of the connector. Canare connectors get close to 75ohms though.
and quality BNC connector from http://www.bettercables.com/1met328feetv1.html
Anybody remember BNCs on early domestic VCRs in the (pre-SCART) 80s ?
Also there was another type of connector used on the first Ferg Videostar models, those large thread type simiar to cable/sat F Connector. Can't remeber the name
All were MUCH better than the scart connector.
But none achieved what the scart connection does!
I only have to look at my Sky box and the sound goes off... SCART plug every time...! I hate the things ...
What's wrong with Scart? For the casual install it's fantastic with plenty of picture options, carries audio, auto video/widescreen switching etc. It's just a matter of one end of the cable into each device and forget about it.
I think the Eichmann Bullet Plugs get very close to 75ohm impedence too.
I don't think the SCART connector was well thought out.
S-Video and composite has to be switched.
S-Video In/out also has to be switched.
Also the actual physical connector doesn't always fit well in the socket.
i.e it easily falls out
And as for the standard angle entry cable!!!
An awful connector hoisted on us by the french, pertinel? It was then modified several times with all these cludges, and hoisted on us by European legislation. It is bulky, poorly screened and messes up signals. Other than that I love it Role on the digital replacement HDMI when all these issues have been addressed in the full spec.
close .......ish but mine fell appart during soldering but hey I don't do that very often
I'll agree that there are much better options than Scart for us aficionadoes, but for the everyday person who wants to connect their VCR or PS2 or DVD player to their TV it can't really be beaten (apart maybe from some of the plugs that get produced).
Bullet plugs always looked a bit flimsy for soldering in the diagrams - especially the earth pin. Expensive mistake to make
Be aware that BNC also comes in a 50 Ohm flavour, so carefull if you intend to solder your own cables.
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