[Amps] Stability of amps

[Gudguyham at aol.com]

In a message dated 9/25/2007 12:58:51 P.M. Eastern Daylight Time,  
john.brewer at us.schneider-electric.com writes:

>>>>From time to time, we get back to basic arguments that  involve 
philosophy of design.  Many
years ago, I remember that  Tektronix often designed their scopes to use 
tubes from  certain
manufacturers, and found that other brands were not suitable.   In order to 
meet their
specifications, they insisted that certain brands be  used in certain 
positions.  And, if the
tube was replaced, the tube  needed to meet design specifications.  Was that 
good  engineering
practice .....? <<<<



I have used just about every Chinese tube and of course Cetrons in my  
conversions and they all work.  Since the Svetlana tubes are a different  design, I 
do not use them.  I don't think argument holds any  water.



************************************** See what's new at http://www.aol.com