C103 uf (22) X the Hfe of Q101 = the equivalent of 220 X 100 . Like a 22,000uf
capacitor bypassing the input stage rail. Much cheaper , too.
OS
capacitor bypassing the input stage rail. Much cheaper , too.
OS
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Started using the multiplier for PSRR challenged CFA input stages.
CFA's will be @ -90db+ PSRR behind the multiplier.
Some VFA's will be -110+db in the same spot.
My new class G OP stage makes more ripple on the high voltage rails , so
I even enhanced the slew-master cap multiplier X2.
Very useful tool - if you don't mind losing 2-3 volts.
OS
CFA's will be @ -90db+ PSRR behind the multiplier.
Some VFA's will be -110+db in the same spot.
My new class G OP stage makes more ripple on the high voltage rails , so
I even enhanced the slew-master cap multiplier X2.
Very useful tool - if you don't mind losing 2-3 volts.
OS
Nice , yours is the 3rd build of this topology.
BTW , my new "greenamp" is similar to this IPS.
It uses the "spooky" input with the kypton VAS (below).
PPM + it can clip all day (self clamping VAS).
Offset is servo'ed with current mirror/source feedback.
It is a unique design.
Thanks for building another.
OS
Attachments
Not yet , very close.
Greenamp uses special output stages - modulated class G (.
4 devices , 2 active will give 200/400w
8 devices will give 400/700w. All on a 100w amp heatsink.
With half the power supply size.
You do need two supplies. The arcam (at 200+ watts - below) has
the little trafo for it's +/- 30V supplies. And a big 70-0-70V.
(Below 2/3) is my faster ,simpler, cleaner class G with 200khz square
waves on a 1k carrier.
Just testing the carrier , it is still at 10ppm despite the rail following of the
HF square wave.
"Greenamp" thread is where this new tech is.
20 patents + 50 designs to inspire me ... way better than a Crest pro-amp ...
NO switching in class G !!
I'm still debating whether to share this ... I most likely will. It's that good
and very different.
OS
Greenamp uses special output stages - modulated class G (.
4 devices , 2 active will give 200/400w
8 devices will give 400/700w. All on a 100w amp heatsink.
With half the power supply size.
You do need two supplies. The arcam (at 200+ watts - below) has
the little trafo for it's +/- 30V supplies. And a big 70-0-70V.
(Below 2/3) is my faster ,simpler, cleaner class G with 200khz square
waves on a 1k carrier.
Just testing the carrier , it is still at 10ppm despite the rail following of the
HF square wave.
"Greenamp" thread is where this new tech is.
20 patents + 50 designs to inspire me ... way better than a Crest pro-amp ...
NO switching in class G !!
I'm still debating whether to share this ... I most likely will. It's that good
and very different.
OS
Attachments
Guys
about bias setting...I have to set for IPS and OPS separately or what? Is it some recommended value of bias for both?
about bias setting...I have to set for IPS and OPS separately or what? Is it some recommended value of bias for both?
Yes . it would work. I used the arc welder simulation to test it.
But I may just make the IPS/OPS all in one.
OS
But I may just make the IPS/OPS all in one.
OS
Valery referenze+Ostriber Slewmaster
Testing an IPS by Valery using an OPS by Pete (well known as Slewmaster).
Testing an IPS by Valery using an OPS by Pete (well known as Slewmaster).
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Nice , some of them slew ops"s are still around.
Maybe I will make separates for the "green ops".
It seems to outperform a 5 pair slew with just 2 active pairs.
A true test of whether the class G non-switching is good would
be a "thimios test" 😀.
OS
Maybe I will make separates for the "green ops".
It seems to outperform a 5 pair slew with just 2 active pairs.
A true test of whether the class G non-switching is good would
be a "thimios test" 😀.
OS
Yeah, cool - a well-designed EF3 creates good constant-input-impedance conditions for the VAS, ensuring solid overall performance 🙂
It would be interesting to see the class G non-switching in action.
It would be interesting to see the class G non-switching in action.
RMAA
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Referenz - high-quality low-cost diy-friendly amplifier
Look here, is an IPS by Valery.
Now is tested in combination with Non-Switching and with the Slewmaster.
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No , thimios. Remember post #105 of this thread. (below).
Referenz = (below) ... minus the Hawksford.
positive servo fb + red led ccs.
I think you built it. So , you build it again. 🙄
OS
