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In Reply to: RE: Volume Pot Question posted by Tre' on December 03, 2016 at 12:08:50
A 201A has a mu of 8, is this the same as gain?
Follow Ups:
I must have looked up the wrong tube.I'm very sorry. I try hard not to make this kind of a mistake.
Thank you for pointing out my mistake. I have edited my post above.
But to answer your question, The mu of the tube is the most gain you can get from it in a circuit. It would be the gain of the stage, when and only when, the load line is totally horizontal.
You would have to load it with a plate choke or a CCS to get close that much gain. The gain of a stage is always lower than the mu of the tube.
Can you give me a link to the ux 201a datasheet?
Edit, I found the datasheet for the ux201a. Sure enough, mu of 8.
I have no idea what data sheet I was looking at earlier. Again, my mistake.
BTW If the mu of a ux 201a is only 8 then everything I said about the Miller capacitance is wrong and driving that Miller will be much easier and will not require a low drive impedance.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 12/03/16 12/03/16
Clearly a different tube.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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