[Amps] 6 mtrs:

[Nils Petter Pedersen]

Well Lou
You are missing the fact that those curves will actually change with changing frequency !
The determining element here is the tube itself, and not the curves.
The curves are graphical expressions of how the tube behaves under certain conditions.
And they are measures giving the tubes dynamic properties.
Which in turn are the result of the tubes mechanical properties.
You can not take a set of curves traced at say 15 Mhz and then "command" the tube to
follow these curves at 50 Mhz !  To do so you would need to brake a few laws of nature... :-)
 The tube's properties will give you the curves, not vice versa and those properties will
change with frequency, most so outside the recommended range.
Peter

  ----- Original Message ----- 
  From: Gudguyham at aol.com 
  To: la7sl at online.no ; amps at contesting.com 
  Sent: Tuesday, September 25, 2007 4:28 PM
  Subject: Re: [Amps] 6 mtrs:


  In a message dated 9/25/2007 10:23:26 A.M. Eastern Daylight Time, la7sl at online.no writes:
    No, I do not think the results would be the same at 3.5 as on 50 Mhz.
    Those curves are traced below 30Mhz and if you try to make a set of curves
    for 50Mhz they would be very different !
  What am I missing here?  What does frequency have to do with operating a tube along a curve based on grid current/plate current? Lou





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