In Reply to: RE: differential phase splitter for the PP power ampilifier posted by Allen Wright on September 16, 2009 at 05:25:46:
Hi Allen
> > I saw the circuit. Is it OK to use E288CC instead of 6H30? < <
THe 6H30 is better, because you can use a lot more current, and to directly drive output tubes, you need LOTS of current.
How about 5687 or E182CC? they has more power dissiplation. I don't have 6H30 on hand.
> BTW, why the circuit need to have current source loading instead of a resistor < <
It doesn't. All my circuits use resistive loading.> > >
I saw the lower ECC88 has connected with upper ECC88 with Fixed biase on the gride. SO, I guess the 2nd ECC88 is a current source. What is this circuit? I don't see on the text book.
Wilson
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Follow Ups
- RE: differential phase splitter for the PP power ampilifier - RCA805 09/17/0906:16:39 09/17/09 (1)
- It's called a CASCODE circuit. - Allen Wright 08:48:35 09/17/09 (0)