[time-nuts] 2nd 5370B

[Collins, Graham]

WD40 (according to the MSDS) is principally Stodard Solvent and light petroleum oil.

Stodard solvent can be thought of as pretty much as and having similar properties to kerosene. The light petroleum oil can be thought of and having simliar properties to something like 3 in 1 oil. I can't say what the propellent would be in a spary.  Proportion wise, the light petroleum oil is approximately 1/3 by volume. I have confirmed this by leaving a sample sit and measuring the remaining "oil".

I wouldn't use WD40 anywhere I wouldn't use either kerosene or oil and my preference is no where inside a piece of electronic equipment.

Years ago I used a product called Neutrol for use in cleaning and lubricating controls such as pots and edge connectors. I haven't used it in many years nor do I know if it is still availabe.

Today my preference is DeOxit. 

When something needs a real good cleaning I will use isopropal (spelling?) alcohol and something like a qtip or cotton cloth followed by a wee bit DeOxit. 


Cheers, Graham ve3gtc


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Robert Atkinson
Sent: February 11, 2011 14:08
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 2nd 5370B

Hi Don,
Perhaps I needed to be clearer on the WD-40. I use one of the pen dispensers with a fibre tip. Alternatively a slightly moistened lint free cloth. NOT an aerosol. You do not want it everywhere, just the poard fingers. I don't apply it to the sockets at all. If all you have is the aerosol,spray it into a small container first and allow the propellent to boil off. do you know of specific problems with WD-40? I've used it for years and never had any problems. I cant say the same for some supposed "contact cleaners" that had aggresive solvents or silicone (definte no-no) in them.
On the socketed ICs, you dont need to remove them. Just ease them up in the socket and press them down again. This breaks any oxide layer.
 
Regards,
Robert G8RPI..