[Elecraft] Solvent

[Mike S]

At 02:12 PM 12/14/2006, Howard W. Ashcraft wrote...
>  For an example of what damage can be done, I am restoring a Tek 
> SC504
>oscilloscope where someone used contact cleaner/solvent on the channel 
>2
>attenuator.

Tek used special PC board material (polysulfone?) in the attenuators 
for many of their scopes. Most of the manuals specifically warn about 
using anything other than isopropyl alcohol for cleaning.

 From the 485 manual - "Cleaning the switch contacts should only be 
done using isopropyl alcohol or a solution of 1% Joy detergent and 99% 
water. Do not use acetone, MEK, MIBK, benzol, toluol, carbon 
tetrachloride, trichlor, trichlene, methyl alcohol, methylene chloride, 
sulfuric acid, or Freon TC-TETF-22-TA-12." - they had a sense of humor, 
no battery acid cleaning allowed!