[R-390] HP 8640B

[Gene Dathe]

Wee bit off topic, but if you guys don't know...

Looking for a HP 8640B; not worried about finding one because they come up 
on Ebay all the time, of course if you want to get rid of your spare...

The real question is, where is a good place to get it serviced?  (If I get 
one that needs a little work I'd like to know where to go in advance.)

Let me say in advance THANKS for your help as always.

73 de NA0G  Gene