Burning Amp BA-3

Hi Nelson,

Yes, I ‘m using the 2sk170 and 2sj74 they are BL and the Idss is 6.89 in a cool environment out of the chassis. So they should creep up a bit with heat.

I have the 330 ohm load and 22 ohms on the drains. I’m not complaining, I didn’t want the THX sticker anyway. I’m just trying to figure out how it works. I’ll run some distortion measurements and report back.

Thanks,🙂
 
For those of you who are not attending BAF, you will delighted to know that
I will be presenting the BBA-3, the balanced version.

Not to despair, I will put it online very shortly after. In the meantime,
hands-off to the usual smarty-pants who are probably already working on
this...

😎

this is what I was referring to when I said "But we can hope for a little spin on things can't we?"
My system's balanced, so I'm MORE than delighted!!!!😀😀😀
 
I don't know how different they will be. So don't know if you can mod the store boards or if we'll come up with new ones.

Nelson really likes surprises , so he doesn't tell me either..

If he current store boards ca nbe modded then each board would only do one channel, so you would need 2 boards for 2 ch balanced.
 
I would think it is just a matter of tying the sources of the input pair together. I would imagine the trick is in how you do that while maintaining the ability to play with harmonic distribution. Just guessing though, as I do not know how.
 
BA-3 Low gain

Hi Guy's

I did some more checking on the front end and I’m getting .5 of the input signal at the gates of the Q3 and Q4 from the input stage, I’m wondering if R5 should be a 50 ohm resistor? The math doesn't seem to work I get 2 or .5?

Thanks,
 
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