[Amps] RF Parts OEM 3-500ZG's

[Gudguyham@aol.com]

In a message dated 8/8/2005 9:02:58 A.M. Eastern Standard Time,  
cherokeehillfarm at earthlink.net writes:

All of  these tubes have worked flawlessly.  I think it is a good idea to  
purchase the matched tubes, because I believe the matching, although not  
done dynamically under load, means that RF Parts themselves have checked  the 
tubes before shipment.  Just one more chance to catch a defective  unit 
before it gets to you is worth  something.




Mike, I too have used RF Parts and Taylor tubes in my 6 meter SB-220  
conversions, they tend to be stable and make as much power as any Eimac tube I  have 
tried in the same amp.   When they match them it seems as though  (by the 
marking numbers) that the tube is put in a jig, and the resting plate  current is 
read on an accurate meter, then marked with the current it draws at  idle, 
tubes with the same numbers are "matched".  I may be wrong on this,  but it seems 
that this may be the way they do it.  73 louie  W1QJ