A little bit different, but yes, with the first result of limiting the maximum symmetrical swing and after the fix there was suddenly a 2.2MHz sawtooth oscillator.
But, the front end also differed significantly, an LTP with high gain and an impedance converter ...
Beelzebub follows the /this principle and the concept, is downsized and deliberately somewhat simpler than, for example, an Aleph by Nelson Pass (who of course originally inspired it /me).
What is interesting is the output bootstrap.
This is what makes the Beelzebub.
I have never seen this before.
And it really works well.
Has anybody seen it before?
This is what makes the Beelzebub.
I have never seen this before.
And it really works well.
Has anybody seen it before?
My simpleEND
from 2003 still uses this principle (till) today, but AlphaNirvana39 also uses the bootstrap (without it, it doesn't work properly).
Everything here started with the SRPP principle in the past.
This is really quite old hat, let's see if I can find the publication haunting the back of my mind from the early 1960s - but it's not important, we recognize how it works, it's not new.
This should be built. I like that its based on available parts. If someone makes a board, i volunteer to test it. Got AN39 (two) to compare it to.
You can place a bootstrap on the output if you like and increase the output swing by a volt or two. I built this thing in the 90s and when I got a simulator, I was quite surprised by the results. Topology is lowly similar, and still working today as my desktop amp.
The key always lies hidden in simplicity.
By the way:
We can probably guess what Beelzebub does with Nirvana 😉.
By the way:
We can probably guess what Beelzebub does with Nirvana 😉.
Guess that you like to exhumate some weird designs, this one look like a 60s botched design from Siemens
that has inverted polarity transistors in respect of this one and wich is class AB rather than A.
If you want to build, or rebuild, such a design i would advice to use BC141/161 instead of BD139/140,
and of course good luck with this new adventure with this hot and a hell of an amplifier, remember,
errare humanum est, perseverare diabolicum.
There is a matching full differential pre-amp but will totally be off topic here. Sorry again for imposing my thoughts.
Nico 😉
I think now is the time for you to knit us all a nice layout for the topic of the thread.
over and out,
HBt.
[QUOTE="hbtaudio, post: 7738262, member: 485640"
By the way:
We can probably guess what Beelzebub does with Nirvana 😉.
[/QUOTE]
We do?
By the way:
We can probably guess what Beelzebub does with Nirvana 😉.
[/QUOTE]
We do?
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No, it's (always) a completely open project, so it's also completely individual - it's not pre-cooked.
Free wiring also works.
