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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: But you haven't answered my question ... posted by Naz on August 18, 2016 at 19:29:06:
Yes, still Class A but not one that follows any of the examples in the books.Is there something wrong with my eyes?
For a 8 volt peak grid swing I get a plate swing of 142.5 one way and a plate swing of 122.5 the other and then there's the problem of the plate resistance increasing as we go to the right.
Let's try this instead.
I get 120 and 125.5 and the plate resistance hasn't changed much at all.But in the end you win. Your example is Class A but bad Class A.
Why in the deuce would we want to spend time talking about a bad Class A?
What would be the point in that?
I pledge from now on I will try to preface my talk of Class A with the word "good" if you will try to remember to preface your talk of what I call bad Class A with the word "bad". OK? :-) (with the understanding the "bad" just means that it doesn't follow the examples in the books and "good" just means that it does)
Or how about when you see me talking about Class A just remember that when Tre' talks about Class A he's always meaning Class A done the way the books show it (silly Tre').
So now we've come full circle. The book Micheal posted the link to says, on page 68 that a Class A amplifier is "An amplifier operated as shown in fig. 306 in which the output waveshape is a faithful reproduction of the input waveshape, is known as a Class A amplifier."
Fig 306 is for all intents and purposes the same as the figure below.
You'll just have to excuse me, I choose to stand on that.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Edits: 08/19/16
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: But you haven't answered my question ... - Tre' 08:45:16 08/19/16 (3)
- Tube curves and Class A - Naz 14:12:59 08/19/16 (2)
- Operating condition vs. bias point. - Tre' 09:21:27 08/20/16 (1)
- We are saying the same thing except for one point ... - Naz 14:31:31 08/20/16 (0)
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