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Old 6th April 2004, 11:56 AM   #1
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Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
Question Tube parameter ?

I have been looking at a GS-35b russian triode and have the data sheets but they are in a little different form than what I need. I need the plate resistance, mu and tranconductance how can I convert mutual conductance to tranconductance?

Thanks in advance ,

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Old 6th April 2004, 12:22 PM   #2
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Join Date: Nov 2002
Location: North Herts, UK
Hi Woody,

mutual conductance and transconductance are basically the same and are both expressed in mA/V so for the GS-35b it ranges from 25-40mA/V.

I don't know mu or Rp for this tube but using the plate curves at 0V grid bias, inspection gives Rp as 4k so mu would be between 6-10.

Hope this helps


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Old 7th April 2004, 06:35 AM   #3
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Location: Wayne, West Virginia

Just to throw out a few formulas:

Rp = u/Gm
Gm = u/Rp
u = Rp x Gm

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