My opinion .... Do NOT "spray" DeoxiT (or any other, "contact
cleaner",) on phenolic rotary switches. (Period)
Worst case, depending upon the carrier and propellant used, the wafer
material will absorb some or all of this stuff and swell up enough out
of shape to misalign the fixed contacts.
Best case, whatever is left behind on the wafers will attract and hold
dust, which can form leakage paths and/or develop into carbon tracks
between fixed contacts.
Both cases are NOT good.
Use the liquid D100L, or whatever they're calling the 100% liquid
solution in the needle-top plastic bottle. Put a small drop on each
fixed contact that you can access SAFELY and then exercise the switch
through ten or fifteen cycles, end to end. That's all that's needed,
and will probably last the rest of the life of the equipment.
If you can't find the liquid, spray a little into the plastic cap of the
DeoxiT can and use a toothpick to again place a drop on the fixed contact.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
Philip Grocki wrote:
*Greetings Drake enthusiasts:*
**
*I'm somewhat weary in beginning to use Deoxit contact cleaner on
delicate electronic switches and the like for the mere fact that I'm
afraid to spray (or dab) _not enough_ or a little _too much_ of the
product. In the instances of hard-to-reach places, is thoroughly
spraying a contact and just letting it be good practice? Can residue
be a problem? Can using Deoxit make thing worse?*
**
*Can anyone give some procedural steps in using Deoxit from past
experiences? Thank you.*
**
*P. Grocki -- W8PSG*
**
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