Tube questions

[CyberGeezer]

And check this website:
  http://www.frostburg.edu/dept/phys/latta/ee/wing813amp/813schematic.html

73 de W2GERry

----- Original Message -----
From: "oh8jep" <oh8jep at KOTINET.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Tuesday, May 21, 2002 3:14 AM
Subject: Tube questions


Hello for everyone!

Does anyone knows which is the aproximately input inpedance for single and
double 813 tubes in grounded grid circuits.
I am designing input circuit matching unit  for the amplifier with those
tubes and like to know that,can anyone help me?
The plate (anode)tension will be abt 2000-2500V

73 de Aatos OH8JEP

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