[momomo6789]

never done one what all would i need ? and would like it to be as nice as possible plugs / wire.

 

[cobaltmute]

Digital, I assume?

Ensure you get 75 Ohm wire and true 75 Ohm plugs. Apparently longer cables are better.

 

[regal]

This is a good topic. Would love to see a BOM with sources part #'s as well as how to properly convert the RCA's to BNC. I always read terminate to 75 ohms, what does that mean (schematic) ?

.

 

[FallenAngel]

This is simpler than most think in theory, just don't "unlearn" some of the things you've been taught.

1) RCA isn't 75-Ohm, BNC can be. No argument. *There is 50-ohm BNC, know what you're buying.
2) There are lots of good quality and inexpensive coax cables that follow the 75-ohm standard such as G-11, RG-11/U, RG-59, RG-59/U, RG-6, RG-6/U, RG-6/QS, though RG-59/U and RG-6/U are the most common.
3) Unless you have a crimping tool, you really aren't going to make an easy termination.

Now that we have those covered, either consider getting a decent 75-ohm coax cable with a 75-ohm BNC connector or just buy a pre-made or custom made cable from suppliers like MonoPrice.com (from which I've recently bought a 12' BNC-BNC 75-ohm cable that I think is great quality) or perhaps one made by BlueJeansCables.com or Redco.com; both offer custom interconnects.

 

[regal]

Thanks for the info.

What about converting or adding a BNC next to the RCA jack on the DAC, what is the proper way to do that ?

 

[FallenAngel]

I convert every single DAC I ever get my hands on to a BNC jack and unless it's overly painful, I run 75-ohm coax wire to the next-in-line component.

Honestly, most DACs should not use the recovered clock, but a proper interface will allow the DAC to make less mistakes, so why not.

 

[regal]

Quote:

Originally Posted by FallenAngel /img/forum/go_quote.gif I convert every single DAC I ever get my hands on to a BNC jack and unless it's overly painful, I run 75-ohm coax wire to the next-in-line component. Honestly, most DACs should not use the recovered clock, but a proper interface will allow the DAC to make less mistakes, so why not.

OK so you don't have to add a resistor? And can you add it in parralell to the RCA jack, or does that screw up the impedance?


BTW, Just ordered a 3dt BNC-BNC from redco.com for $16, much cheaper than buying the crimp tool and etc.

 

[johnwmclean]

Fallenangel, I used a Neutrik BNC jack on my buffalo build, but I didn't realize there was such a thing as 75 - ohm wire. I used some Vortex OCC, around 2 inches worth to the Mux. Should I change?

 

[momomo6789]

yeh looks like i would be wasting my time on a digital cable just bought one off bluejeancables about the same price to do it my self minus the time

 

[cobaltmute]

Quote:

Originally Posted by johnwmclean /img/forum/go_quote.gif Fallenangel, I used a Neutrik BNC jack on my buffalo build, but I didn't realize there was such a thing as 75 - ohm wire. I used some Vortex OCC, around 2 inches worth to the Mux. Should I change?

there was just a discussion about SPDIF cable length at DiyHIFI. It degenerated till the thread was locked, but there is some info in there about impedance mismatches and cables.