[AMRadio] WD-40 Experience

[W5AMI]

I've used it for a lot of things in the past with no ill effects, I use it
sparingly and attempt to get all the residue out afterwards.  It's saved my
you know what many a time...

73
Brian



On Thu, Dec 12, 2013 at 6:11 PM, David Knepper <collinsradio at comcast.net>wrote:

> Thank you, Eric, for confirming what many of know about the wonder of
> WD-40.
>
> However, I do not recommend it for cleaning switch contacts.
>
> David Knepper - W3CRA/W3ST
> Collins Radio Association
> www.collinsra.com
> Join the CRA today
> -----Original Message----- From: Eric Nelson
> Sent: Thursday, December 12, 2013 4:05 PM
> Cc: AMradio
> Subject: Re: [AMRadio] WD-40 Experience
>
>
> I've used WD-40 off and on in pots for more than 40 years without the
> negative experience you've had.  Perhaps the main difference is in the
> method I've used.
>
> After spraying the contact area inside the pot and working the control a
> few times, I follow up with about 10 to 15 seconds of compressed air as I'm
> working the control.  This blasts away most of the residue along with any
> of the contamination that created the noise problem in the beginning.  The
> control then has an extended life at least as long as if the control had
> been replaced.
>
> Eric
> Sent from my desktop PC
>
> -.-
>
> -.-
>
>
>
>
> On Thu, Dec 12, 2013 at 12:58 PM, JAMES HANLON <knjhanlon at msn.com> wrote:
>
>  This is a true story about the use of WD-40.  Folks who are using it to
>> clean pots and switches are invited to take it for what it is worth.
>>
>> At one time I worked for Bell Labs.  Back a good many years there was a
>> hurricane in Florida which drowned the telephone exchange at the Homestead
>> Air Force Base.  Bell System folks from all over the country converged to
>> help dry out and restore the exchange, an electromechanical "crossbar"
>> type.  My Laboratory was responsible for "Electromechanical Switching
>> Equipment" including the relays and crossbar switches in the exchange, so
>> we had an engineer there with the crew.  The folks decided to spray the
>> crossbar switches with WD-40.  It did indeed displace the water and
>> restore
>> the switches to operating condition, as the "WD" implies.  But several
>> months later as the more volatile components of the WD-40 evaporated and
>> the less volatile components remained behind, the switch mechanisms
>> started
>> to gum up and the switch contacts went high resistance to open circuit.
>>  Finally the entire exchange had to be scrapped out and replaced.
>>
>> Because of this experience, I do not use WD-40 to "clean" any switch
>> contacts or potentiometers in my radio equipment.
>>
>> Jim Hanlon, W8KGI
>>
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