J
JOAT
New member
Hi all. I was wondering if any of you could help answer a couple of questions of mine:
1: I recently used Canare Star Quad to make some 15' unbalanced cable to connect my recorder to my mixer. I was at a loss to explain why I ended up having very noticable HF loss using the Star Quad when compared to the Radio Crap premade cables I was using temporarily. I think I may have figured it out, though.
I combined all four conductors into a "single conductor" with the thought of reducing the resistance of the wire. But have I inadvertantly DOUBLED the CAPACITANCE from 46pf/ft for a pair of hot signal to 92pf/ft using all four conductors? Would this be enough to cause my HF loss?
I have long since thrown away my college physics texts so I am not sure.
If this is the case then should I resolder it so the extra pair of conductor go to ground along with the shield? Should I just cut them off? Should I cut off the sheild and just have the extra conductor as ground (see below)?
2. Why are pro audio unbalance cable and consumer interconnects wired differently?
Pro audio unbalanced are single conductor with the shield going to ground.
Consumer stereo interconnects are two conductor wire with one wire carrying the signal and the other conductor going to ground and the sheild completely cut off (the shield may be soldered to ground but the joint is tight and I can't get a clear view).
Is there an advantage/disadvantage to either one? Does the -10db vs +4db difference prefer one or the other?
Thanks in advance to any and all suggestions and sorry about the length of the questions!!!
JOAT
1: I recently used Canare Star Quad to make some 15' unbalanced cable to connect my recorder to my mixer. I was at a loss to explain why I ended up having very noticable HF loss using the Star Quad when compared to the Radio Crap premade cables I was using temporarily. I think I may have figured it out, though.
I combined all four conductors into a "single conductor" with the thought of reducing the resistance of the wire. But have I inadvertantly DOUBLED the CAPACITANCE from 46pf/ft for a pair of hot signal to 92pf/ft using all four conductors? Would this be enough to cause my HF loss?
I have long since thrown away my college physics texts so I am not sure.
If this is the case then should I resolder it so the extra pair of conductor go to ground along with the shield? Should I just cut them off? Should I cut off the sheild and just have the extra conductor as ground (see below)?
2. Why are pro audio unbalance cable and consumer interconnects wired differently?
Pro audio unbalanced are single conductor with the shield going to ground.
Consumer stereo interconnects are two conductor wire with one wire carrying the signal and the other conductor going to ground and the sheild completely cut off (the shield may be soldered to ground but the joint is tight and I can't get a clear view).
Is there an advantage/disadvantage to either one? Does the -10db vs +4db difference prefer one or the other?
Thanks in advance to any and all suggestions and sorry about the length of the questions!!!
JOAT
