SUPEROPA amplifier

[Steef]

see my last research about simple amplifier
without biasing stage
need glue ntc on final BJT
never tested

[andrew ivimey]

your postings are too cryptic - what on earth are you saying?

[Greg.]

He's done this several times before. I suspect he is commercial. Moderators need to act.

[Shane]

Very odd. He pops up now and then with a peculiar circuit which he may or may not have designed and usually hasn't built, says nothing about it and then pushes off for a couple of months.
I'd say harmless but slightly strange.



Of course he's foreign, you know...

[Greg.]

Originally Posted by Shane

Of course he's foreign, you know...

Ooo er! that's a bit controversial these days, don't you think?

[david counter]

I've always thought about him as a slightly mad professor

[Steef]

do not be so suspicious
see the architecture
is new
are very good
need some other explanations?
probably does not work
remains an important new design

[Shane]

Originally Posted by Shane

Of course he's foreign, you know...

To be read in a Bloodnok voice. (Those who don't know who Major Dennis Bloodnok was may complete their education here http://www.thegoonshow.net/characters.asp )

Back to the subject in hand. Steef is definitely to be encouraged and nurtured, rather than censured. I have no idea whether his designs work or not (and quite possibly neither does he) but so what? Perhaps someone should try putting one together to see what happens.

Steef, have you ever built any of your designs?

[andrew ivimey]

I know just enough to look a the schematic and think, '...might work.'

but what do I know!?!

it is a bit daft just to post something like that with no explanation though.

'...need glue ntc on final BJT...' - we all know that!

tell us more Steef, please.

[Steef]

What can I say
in my recent searches
I focused attention on clearing the stage for biasing

I think the classical stage of automatic control of bias (NPN with trimmer)
should be eliminated
because it creates a difference between the upper and lower VAS
so a distortion on middle/high when you have a lot of harmonics
for example a piano

This solution could resolve the problem

comes from an old design Accurphase ... such
but I do not think that has ever existed first

maybe if I helped produce an interesting result

some time i have tested my invention
without good results

...because i'm a good creative
but not more

for example i'm not able to calculate value of ntc
be patient
this WE I have time to test it