[Hammarlund] Fw: [R-390] WTB: Working Collins 51J4

[James A. (Andy) Moorer]

Question from John Zimmerman <jlafoy at comcast.net>. Anybody know an answer?

>
> BTW, can you tell me why SP-200s (not 600) are so darned unstable?  I have 
> three of them and none is very stable (mechanically).  How did they ever 
> use them in the field?  I am wondering if I can improve their stability.
>
>

James A. (Andy) Moorer
www.jamminpower.com