BlueJeansCable- pseudo review (1 Viewer)

[Bob McElfresh]

I think the specs for both 7710 and 1694 are identical. I'd go with the 7710 simply because it's bundled at the factory.

 

[Arthur Vino]

thanks!!

 

[Vince Maskeeper]

7710 is just multiple runs of 1694a in an outer jacket.

I have built from both, they are identical.

-V

 

[Wayne A. Pflughaupt]

Bob,

The glove-soft, flexable rubber cables are actually BAD for the signal. The better/more professional grade cables are usually encased in a very stiff/thick outer sheath.

Not sure I get this. I think everyone knows that Canare and Mogami are professional brands, and they both make a ton of that stuff - and it’s commonly used in pro audio applications.

The last time I saw you mention this, on this thread, you noted that stiff cables better maintain uniform impedance – which is more an issue for video cabling, right?

Regards,
Wayne A. Pflughaupt

 

[Arthur Vino]

Does 7710A has that soft rubber cable?

quote:

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The glove-soft, flexable rubber cables are actually BAD for the signal. The better/more professional grade cables are usually encased in a very stiff/thick outer sheath.

 

[Chris*Liberti]

Well I finally tried one of their video cables and it worked well. Surprisingly on my LD player it made a pretty big difference over one of the cheap Monster Cables. The color fidelity was slightly improved and noise reduction was phenomenal.

 

[Chu Gai]

I'd like to throw something out to digest...something along the lines of what Wayne tossed out regarding flexible cables. Now first let me begin, that based upon a perusal of manufacturer's data, there's no doubt that a single center conductor, in a hard dielectric like polyethylene, can be made to tighter tolerances with respect to impedance than stranded. The question is, apart from a preference, is this really needed in all cases?

It's often stated in engineering circles, that the impedance of a wire makes a difference when it's length is 1/4 of the length of the frequency that it's supposed to pass. For example, if the frequencies we're dealing with are 50 mHz, then the corresponding wavelength is approximately 20 feet, 1/4 of which is 5 feet. For a 5 mHz signal, the critical distance increases to 50 feet. Now the way I read this, is that for many people, not only is the tolerance (+/-) somewhat irrelevant, but likely so is the actual impedance of the cable.

This thinking upon my part is predicated by a couple of considerations.
1) We're talking about nominal lengths that are well below the 1/4 thing I mentioned above.
2) The units that we're connecting, a DVD, receiver, or TV, often don't contain circuitry that requires a 75 ohm impedance and quite often has a terminating 75 ohm resistor...faking it so to speak.

Wayne, Bob, Vince, others...any thoughts or perhaps links to where careful studies might've been done?

 

[Wayne A. Pflughaupt]

No thoughts or links, but a burning question: Has anyone every put a meter across a 75-ohm cable and actually got a 75-ohm reading?

Regards,
Wayne A. Pflughaupt

 

[Chu Gai]

well that you won't get Wayne since what's talked about is in actuality the characteristic impedance which in this case is not the resistance.