[Milsurplus] REF: INFO onGreen Gear and Oldham coupler

[Dan Arney]

I am getting a lot of email as to what is a green gear and old coupler.

Green gear is NOT used the R-390-A only used on the R-390 non A and 391 
that I am aware of.
It is only used during maintenance on the RF deck when removed to keep 
the gear train in sync. When not in use it is
attached to the sub panel. for storage. They were made without legs, it 
appears that the gears learned how to walk away in most cases. Hi.

The Oldham coupler disc is to act as  universal between the PTO and gear 
train matching parts with springs crossed over
in two places to help reduce backlash in the tuning. It is in about all 
series of radios using PTO's.
The name is a standard in industry for all types and sizes of couplings 
that need transitional alignment for smooth application of adjustment or 
power.

Whew what a mouthful.
This should start a thread and a half .
Air conditioned, triple layer nomex fire suit on with ear plugs installed.
Hank
KN6DI