Topband: Control cable black conductors

[Larry]

Nothing said about concentration. We eat acids all the time (e.g., coffee, 
citric fruits, vinegar) and your stomach already has acid (HCl).

73, Larry  W6NWS
-----Original Message----- 
From: Charlie Cunningham
Sent: Saturday, February 22, 2014 9:25 AM
To: 'Larry' ; topband at contesting.com
Subject: RE: Topband: Control cable black conductors

And people DRINK this stuff!!?? :)


-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Larry
Sent: Saturday, February 22, 2014 9:17 AM
To: topband at contesting.com
Subject: Re: Topband: Control cable black conductors

Phosphoric acid is still listed.

73, Larry  W6NWS

-----Original Message-----
From: Kenneth Grimm
Sent: Saturday, February 22, 2014 7:51 AM
To: Tom W8JI
Cc: Dave G4GED ; topband
Subject: Re: Topband: Control cable black conductors

Is it phosphoric acid that gives Coca Cola its peculiar cleaning ability?
I no longer can imbibe cola drinks due to a very annoying allergy, so I
can't check a label to see if it is listed.  I do know that Coke will clean
oil deposited on your windshield when commercial windshield washing liquids
just cause it to smear...so it has something in it that that may work quite
well, and without turning your hands red!

73,

Ken - K4XL


On Sat, Feb 22, 2014 at 7:38 AM, Tom W8JI <w8ji at w8ji.com> wrote:

> All the other 4 conductors are bright clean copper when stripped.
>> Could anyone tell me why some insulated copper conductors turn black
>> in this way and whether there's a better way of cleaning it off.
>>
>
>
> Water inside the insulation plus sulfur and/or irons that formed
> copper sulfide or covellite.
>
> I've been successful using phosphoric acid. It is sold as a clear
> liquid wire or mag wheel cleaner around here. You'll know it by how
> red and painful it turns your hands.
>
>
>
>
> _________________
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