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@contesting.com
Subject: RE: Topband: Control cable black conductors
And people DRINK this stuff!!?? :)
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Larry
Sent: Saturday, February 22, 2014 9:17 AM
To: topband@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@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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