[GreenKeys] AN/UGC 74A and 74B

[Don Robert House]

Hopefully they use a different material for the platens...
and thanks to Bruce for the well thought out explanation,,!

Don

On 30 Nov 2010, at 8:43 AM, Pete Lancashire wrote:

not only ribbons but $3 million in 2001 and 2002

to the tune of $3 million worth of them in 2001 and 2002

<http://www.governmentcontractswon.com/department/defense/an-ugc-74.asp?yr=02 
 >

Makes sense..!
> I am fairly certain the decomposing parts are polyurethane. In the
> early 1970s, it was considered a miracle material and used for an
> incredible number of applications. It worked very well, but no one
> apparently know of it's instability. The best recording tapes of that
> day used it in the binder  to hold the oxide coating to the base,
> these tapes are totally unusable about 95% of the time today. I have
> cleaned the gook out of a couple UGC-74s and substituted rubber tubing
> for the covering. The decomposition is greatly accelerated by heat and
> humidity, and tends to occur without warning over a short time.
> "Gumout" brand choke and carburetor cleaner did a good job getting the
> goo off everything. It won't dissolve it immediately all the time, but
> loosens it's grip on surfaces so it can be peeled off. It is one of
> the nastiest things you can imagine to get off skin and it stains
> clothing permanently. Do it outdoors away from any ignition sources,
> and wear old clothing and gloves.
> Bruce Gentry     KA2IVY