[Hammarlund] SP-6OO Tuning

[Mark Huss]

Jim, naphtha is the real old stuff. I think it is called 
Perchloroethylene 
<http://en.wikipedia.org/w/index.php?title=Perchloroethylene&redirect=no> 
.  If you do get the stuff, follow the Material Safety Data Sheet 
carefully.  Wear latex gloves, eye protection and a well-ventilated 
room.   If you spill it on yourself, it is not a major concern.  It will 
go through the gloves, but it takes a few minutes at least.  Even then, 
about the worst it will do is to dissolve your skin oil.  Don't drink 
it.  Don't wash your eyes with it.  Don't set the open bottle by the 
Bunsen Burner you use to keep your Coffee Cup warm.  And wear eye 
protection before the bottle is opened.  As my childhood neighbor who 
taught me my first lessons in electronics always told me, "Always wear 
Safety Glasses.  You never know.  The Japanese might drop a bomb on the 
place."  True story.  There he was, filing the tip of his soldering 
iron, not wearing Safety Glasses.  When out of the blue, the Japanese 
dropped a bomb on the place.  The hot iron flew up and hit him in the 
eye, causing him to loose it.  Who Knew!

  We always used straight alcohol.  Had to sign for it from Supply 
because it was taxable as Spirits marked >199 proof.  Had to keep it 
sealed because if you left it open for more than a few hours you had to 
dump it.  Isopropyl is supposed to be a great cleaner, but after the 
'Incident', the Col banned it from the building.  Can't blame him.  They 
had to rip the capstans out of some recorders in Florida and fly them by 
Lear-Jet to Central Turkey. 
Jim Wilhite wrote:
> Interesting Mark about the Alcohol.  Back when I was a pup working for 
> radio stations, the cart machine manufacturers all said to use 
> denatured alcohol, 99.9% to clean the capstans and avoid Isopropyl and 
> other cleaning agents because they contained contaminants such as 
> water and light oils.
> Maybe the content of denatured has been altered???
>
> As I understand dry cleaning fluid is naphtha, which is a light oil.
>
>
> Jim
> W5JO
>
>
> Alcohol is a poor second. Beware Isopropyl or denatured
>> alcohol and wood alcohol. The stuff not only will make you blind, but 
>> the denaturing agent is a lubricant! (wouldn't know it by reading the 
>> chemical write-up on it) Had some Rocket Surgeon use it on the roller 
>> pucks of all the High Speed Tape Recorders, causing massive wow and 
>> flutter as the pucks skipped on the spindle. Had to replace them all 
>> as the denaturing compound soaked into the rubber pucks. Bad Words. 
>> Life Lesson #233: Learn a Second Language. Multilingual Cursing helps 
>> purge the soul.
>>
>
>
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Some people are like a Slinky .. not really good for anything,
but you still can’t help but smile when you shove them down the stairs.
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