[R-390] Collins Mechanical Filter History

[Llgpt at aol.com]

Already wprking on it. I figure the person who wrote it has probably never  
seen a vacuum tube, much less know the difference between a R-390 or a R-390A.  
(see how easy that was to say?)
 
Les
 
 
In a message dated 6/4/2005 10:31:10 AM Central Daylight Time,  
tetrode at comcast.net writes:

Les,
you should send Collins a nice note, talking about it here will  not fix 
their problem. That 390/390A statement is 50 year old minutia that  nobody 
cares much about save  us.

73,
John