Mudcat said:
I'm in the middle of testing the LCR characteristics of several DIY speaker cables. Included in the group is 12/4 and 10/4 power cables. In this test, two wires handled the speaker load, and the other two wires (see sketch):
Test 1. Did nothing
Test 2. Provided power to a 500 watt photo lamp
Test 3. Provided power to a speaker playing pink noise
In tests 2 and 3, there were differences to the measured LCR parameters compared to test 1. However, these were very insignificant differences and easily attributed to meter error. I'm in the process of getting my meter recalibrated and will repeat the test in the future. But I do not think this will change the outcome. Admittedly, my meter, while a very good one, and expensive, is not a Wayne Kerr 3260B ($15,000.0).
So IMHO is that you will be okay with the speaker cable. I can't provide an answer for the video cable, other than to suggest that it had better have some very good shielding.
Okay John and Gene, light your fuses. I'll duck behind this here brick wall.
A brick wall won't help...Two weeks ago, I was riding bikes with my 11 year old on site, I had already setup my equip, and the kid hired to work it was up to speed..So we went biking...
We rode to the far end of the property (5500 acres), and found the gun range. 100 yards to target, this is where the two lab swat teams practice....my kid loved it..what cracked us up was the range right next to it...it was a grenade range...holy mackeral!!!! You gotta be kiddin me...
OH, almost forgot...your test...
From that setup, I'd expect no RLC changes, as the way you connected them is orthogonal within the cabling.. Any slight change may have more to do with the meter and the local enviro, rather than the wires themselves.
As for the origional question. If your power cable is the normal three wire, twisted kind, you probably won't have any issue. Things that can get through would be RFI, if any. There, shielding would help for the video cable. Your best bet is to get some dirt cheap video cable and try bundling. If it is good, but the video quality is not the best (because of the dirt cheap cable), then you know that the rfi and hum are not issues, you can just upgrade to a better quality video feed...assuming the dirt one was unacceptable video wise.
Cheers, John
