Topic: BNC > RCA cable

[tedyun]

I tried to make a digital cable to go out of an AD2K+ to a PMD-661. I am using a 75 ohm cable (Mogami 2964). I thought this should be brain-dead simple, ie., solder the conductor to the tips of the connectors and the sleeve to the shield. When I connect the cable, I get a "digital-in error." When I use my RCA > RCA cable with a BNC adapter, the connection is fine, so I'm sure it's my handiwork.

I made sure there are no loose connections, and no shorts.

Is there something obvious I'm overlooking?

[tgakidis]

BNC connectors exist in 50 and 75 ohm versions.  Looks like you might have a 50 ohm

http://en.wikipedia.org/wiki/BNC_connector

[tedyun]

I thought that might have been it, but it looks like it's a 75 ohm BNC:

http://www.redco.com/shopexd.asp?id=686&bc=no

This is the RCA connector:

http://www.redco.com/shopexd.asp?id=299&bc=no

and this is the cable:

http://www.redco.com/shopexd.asp?id=511&bc=no

BNC connectors exist in 50 and 75 ohm versions.  Looks like you might have a 50 ohm

http://en.wikipedia.org/wiki/BNC_connector

[notlance]

"I made sure there are no loose connections, and no shorts."

How did you make sure?  Did you use an Ohm meter to check your work?  I do not intend to doubt your abilities, but working with coax it's easy to get a stray shield wire that shorts the cable.  I do it all the time!

[tedyun]

I can check again. The shield wire is definitely not touching the cable.

"I made sure there are no loose connections, and no shorts."

How did you make sure?  Did you use an Ohm meter to check your work?  I do not intend to doubt your abilities, but working with coax it's easy to get a stray shield wire that shorts the cable.  I do it all the time!

[spyder9]

http://www.bluejeanscable.com/store/digital-audio/index.htm

I just bought the Belden 1694A, 6 feet RCA/BNC for $23.00 shipped.  Might save you the time and aggravation.