Geoff wrote:

Okay, I should have specified CONNECTORS rather than cable, there.

Connectors with copper contacts ?

Brass or bronze.

For the most part, nickel and tin plating reduces these problems a lot,
and silver and gold plating eliminates them.

But we still have plenty of unplated brass around here.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

"Geoff" wrote in message

Scott Dorsey wrote:
Bob Quintal wrote:
(Scott Dorsey) wrote in
Pooh Bear
wrote:
Please do educate us as as how you think a cable can
introduce distortion !

The most popular possibility is corrosion forming
copper oxide rectifiers. Not unusual at all, I am
sorry to report.
Only a possibility if the copper oxide is in series
with the signal. Given that that means all strands
broken in a lead in the cable, i'd say there's greater
possibility of pigs flying.

Okay, I should have specified CONNECTORS rather than
cable, there. --scott

Connectors with copper contacts ?

There are all kinds of base-metal contacts in the real world, after the
plating wears off...

Chris Hornbeck wrote in
:

On Thu, 11 May 2006 12:05:57 +1200, "Geoff"
wrote:

Okay, I should have specified CONNECTORS rather than cable,
there. --scott

Connectors with copper contacts ?

Connectors connect to wire. Oxide in an 18% free oxygen
atmosphere is a dead cert. Ain't no big deal.

Chris,

I agree with you. If you go back to my post Scott replied to,
I stated that the oxide layers had to be in series with the signal.
As long as the strands are not broken, and properly terminated at
the connector, you don't get oxide in series.

--
Bob Quintal

PA is y I've altered my email address.

Pooh Bear wrote in
:



Bob Quintal wrote:

(Scott Dorsey) wrote in
:

Pooh Bear wrote:

Please do educate us as as how you think a cable can
introduce distortion !

The most popular possibility is corrosion forming copper
oxide rectifiers. Not unusual at all, I am sorry to report.
--scott

Only a possibility if the copper oxide is in series with the
signal. Given that that means all strands broken in a lead in
the cable, i'd say there's greater possibility of pigs
flying.

You are of course quite right.

I have of course come across such cables in the local venue!

I even have a few in my "to be repaired" bin. But even then, the
break is usually at the termination, where it maniifests itself
as several megOhms of series resistance, not a series PN
junction. I think I've seen a conductor break mid-cable once in
my 55 years, from having a heavy object dropped on it. ,

--
Bob Quintal

PA is y I've altered my email address.