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Some test results on JJ 5751 [message #72921] Tue, 05 June 2012 08:56 Go to previous message
Aki is currently offline  Aki
Messages: 36
Registered: May 2009
Baron
Have been testing a batch of newly released JJ 5751, and came up with some test results that I thought I might share with folks here.

Visually, JJ 5751 is identical to JJ ECC83S. Same glass, same plate structure. Electrically, they are definitely different creatures.

The numbers below were from a batch of 20 JJ 5751, tested at Ip=1mA, Ep=200V. Average numbers from JAN GE 5751 and JJ ECC83S on the same tester are listed for comparison.

                            
                JJ 5751      JAN GE 5751    JJ ECC83S
Conductance :    2000           1650          1800
   Mu:            82             75            95


From the numbers above, calculated plate resistance are similar between JJ 5751 and JAN 5751.

Of course, this is only a test at a particular operating point and not a full curve trace by any means. But you get a general idea as to how JJ 5751 would behave.
 
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