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BCN cable for wordclock - Impedances and types
Old 19th January 2013
Gear Maniac
distante's Avatar
🎧 10 years
BCN cable for wordclock - Impedances and types

Hi to all!

I just did some connections with my UR824 and I hook up a Focusrite Oktopre and a crappy digital mixer into the ADAT inputs of the 824, I used the Oktopre for master clock (since it only can send clock for ADAT or receive for WordClock).

The thing is that sometimes I will need to keep the Oktopre off, send clock from the 824 turn and turn on the mixer (because I use the mixer as a remote Midi controller), and I for any reason I had to turn on the Okto in a middle of a session all the syncro get screw.

So since the mixer and the Oktopre had wordclock ins/outs I think would be better (and less messy) if I just send the clock using the BNC workclock outputs in the 824, I never used BNC cables for Clock (always used ADAT!) So I'm not sure of what to buy.

For what I remember, the impedance of the cable/connectors must be of 75ohms, there's a neutrik connectors with 75ohms so I will use them, but what cable refers I'm really lost.

A friend who uses BNC for video told me about the RG59 and RG6 cables (both 75ohms) but I don't know what's the difference between use one or other in clock applications.

Any of you guys can share your experience with this?

Old 19th January 2013
Deleted a08cf2a
RG6 Belden 1694A, note that connectors are specific to a cable model and so are the die for the crimpers required for assembly.
Old 19th January 2013
Deleted User
I used BNC cables 75 ohm from Radioshack, never had an issue with them.
I clocked a Roland VS2480, MOTU 828MKii, DIGI002Rack with them. Worked fine
Old 19th January 2013
Gear Maniac
distante's Avatar
🎧 10 years
mmm here (in my country) Radioshack only sells this auvio stuff, some of them are really overpriced (like 70 bucks for a meter of optical cable) and other don't had any technical info.

For example :

tech info:
Connector: Male.
Connector cover: Gold 24K.
wire conductor: 0,04 pulg. (1,02 mm) CCS.
cable insulation: 0,18 pulg. (4,60 mm).
length: 3 feet (0,91 m) x 15-214 / 6 feet (1,82 m) x 15-215 / 12 feet (3,65 m) for 15-216.
shield: 0,006 pulg. (0,16 mm) × 48 AL paper.
cover: 0,27 pulg. (6,8 mm) black.

That's why I think I will need to buy the cable and connectors myself
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