SUPEROPA amplifier

[andrew ivimey]

very interesting Steef, good luck!

[Steef]

see also this
without biasing circuit
but need big dissipator

[Steef]

Mosfet drive variation

Now this idea come to be IGBT-similar
Because within BJT drive
There isn't any current limiting for the transistor bases.
This will most likely kill one or more parts.

for mosfet biasing need swap red leds
with a series of power diode (3x)
until have 2.1 Vsg --> Class A current

[Steef]

update schematic

[Steef]

test result:
it's a good RF oscillator!

see version 7:p

[Steef]

DEAR FRIENDS
now i can say that amplifier works very good

start with 0.3Vbe on final BJT (C5200 & C)
then go to very hot bias 0.7V
then stabilize on 0.5V by itself (ntc works)

live and round suond without distortion
true class A good power... try!

driver is C5171 & C
with single input signal (not two rails as normal)
this solution I probably will deliver the Nobel Prize

[Steef]

NEW upgrade

[Steef]

do not forget to test this solution
because work so "live":p

[Dave the bass]

...it's the amazing one-man-thread

DTB

[David Mccallum]

Hi steef, are you having problem with universal translator, try a babble fish - a towel may also be of importance, somehow.

Good luck. 11001011100010011001010010001101

Your planet depends on you.