[AMPS] tuning capacitor & insulator

[Rich Measures]

>
>
>
>On Thu, 17 Dec 1998 16:25:34 -0800 Rich Measures <measures@vc.net>
>writes:
>
>
>SNIPPED
>
>
>>>No criticism of Rich's particular design; the limitation is in the 
>>tubes
>>>themselves.
>>>
>>Ä  Did you perhaps presume that the 7580 has the same power capability 
>>as 
>>a 4CX250B?
>
Carl Heuther, NJ1H, wrote:
>Presumption or fact Rich?  Yes the 250R and 7580 ( not exactly the same
>tube either) have somewhat different specs than the 250B ,  but they
>still have identical cathode emission.

€ According to Eimac's Technical Data  (6-16-61):   "The 4CX250R will 
deliver more output power in most linear amplifiers which presently 
employ the 4X250B or 4CX250B ... ... ...".    
Carl:  How can "more output power" be obtained if the B and R versions  
"have identical cathode emission"?

-  The constant current curves  unsurprisingly shows that the R version 
has a higher peak current ability than the B version.  However, 'more 
output power' is realizeable only when sufficient screen-potential is 
used.  
  
-  later,  Carl


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm