ha i have a different goal on this one.
the idea is usage of dumpster junk and/or any available parts.
possiblly everything from salvage junkyard ie delco , heat sinks, ignition resistors , marine parts and of course lots chrome..
it has to be simple ,just a few point-to-point connections but very high performance.
the ccs would add another active part.
how is wiring going?
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Then please show us a schematic........it would be nice for others to be able to compare the circuits and have their opinions stated on yours too.....right now, IMHO, your bragging without anything to show for it.....
Then please show us a schematic........it would be nice for others to be able to compare the circuits and have their opinions stated on yours too.....right now, IMHO, your bragging without anything to show for it.....
Sorry, I want to sell some amps before our Chinese comrades start ripping them off.
Hint: more current for higher slew rate.
If an active part improves performance creating better conditions for another active part is it bad? ;-)
Some people believe that capacitors are not kosher, but what about a rectifier without capacitors? ;-)
Then please show us a schematic........it would be nice for others to be able to compare the circuits and have their opinions stated on yours too.....right now, IMHO, your bragging without anything to show for it.....
check your browser maybe. I've put it on at least four posts. At each stage too so it can be followed. Right not the power version is in test. Not released.
See note on schematic.
Here it is one more time. The circuit is basically identical irrespective or pre-amp or power amp. the .6 version had a schematic typo. The output was shown at 12au7 cathode. It should have been at the irfp9140 drain.
No bragging , just hard test numbers. I always shown with schematic too.???
So not sure what you referring to.
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The additional part also has non-linear errors. So it becomes a compromise, greater efficiency , slew rate or simplicity.
Not sure totally its very subjective on the dampening factor too.
I have always thought high dampening factor amps sounded constipated for lack of a term.
For sure on string instruments the speaker should float.
Then please show us a schematic........it would be nice for others to be able to compare the circuits and have their opinions stated on yours too.....right now, IMHO, your bragging without anything to show for it.....
opps thought it was for me.
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Sorry, I want to sell some amps before our Chinese comrades start ripping them off.
Hint: more current for higher slew rate.
The China hifi market is very interesting. I went to this factory, RnD lab unannounced two years ago.
They were very friendly and accommodating , I brought some demo music and had a blast.
But one building the main mfg was off limits. No way Jose any visitor go in.
They make all sorts of audio equipment mainly for domestic use.
They would absolutely not sell anything to me even with cash.
Xindak Products
Its in Chengdu, home of the great Pandas.
The people are very independent minded being so far from Beijing.
I was there evaluating some 6000HP electric fracturing pumps. Largest in the world.
Also if you can get to one of the Shanghai High End Audio shows its worth any effort.
bruce
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Sorry, I want to sell some amps before our Chinese comrades start ripping them off.
Hint: more current for higher slew rate.
Just because I was interested I googled "wavebourne hybrid amplifiers"
And found your schematics, website, everything else too..............including lots of posts on other forums. So when the schematics are already in the public domain and the Chinese have not already "ripped them off".....
Yes, you do have some good improvements of circuits that were already in existence, and you have helped others in the past more constructively....I just feel that comments like "Mine has better frequency response. Yours has slew rate limit." with out explaining why or showing a better way is of no help to anyone.
BTW, you do know the "Pyramid" name is trademarked by an audio company of that name....they do home. pro, and car audio......wonder it they feel "ripped off"..................
been running tests on power output stage, yep works as expected etc but guess forgot how much darn waste heat for resistor loaded se.
its the .61 schematic from last post , using two seven ohm power resistors.
for r5 r10 and 1200uf output cap.
so I'm rethinking possibly going to 'enhanced A' as in audioXpress march 2007.
The hybrid .61 becomes the Vas.
Drawing up on Eagle now.
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its the .61 schematic from last post , using two seven ohm power resistors.
for r5 r10 and 1200uf output cap.
so I'm rethinking possibly going to 'enhanced A' as in audioXpress march 2007.
The hybrid .61 becomes the Vas.
Drawing up on Eagle now.
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Just because I was interested I googled "wavebourne hybrid amplifiers"
And found your schematics, website, everything else too..............including lots of posts on other forums. So when the schematics are already in the public domain and the Chinese have not already "ripped them off".....
Yes, you do have some good improvements of circuits that were already in existence, and you have helped others in the past more constructively....I just feel that comments like "Mine has better frequency response. Yours has slew rate limit." with out explaining why or showing a better way is of no help to anyone.
BTW, you do know the "Pyramid" name is trademarked by an audio company of that name....they do home. pro, and car audio......wonder it they feel "ripped off"..................
1. It is a completely different schematic.
2. Pyramid is a figure, and yes, some companies could register as DBA this word for their company names, like "Cube Corporation, Burkina Faso". So what? It's not my company name. My company name is Wavebourn, and DBA is registered in Contra Costa County.
3. I explained about frequency limit and a slew rate. If you don't get it, it's not my fault.
4. All music is made of 12 notes. People continue composing. So what? I could patent lot of things, but did not. For example, usage of SS gyrator to load vacuum triodes, solid state output stage I designed in late-70'Th, and so on... What's your point?
sort of an update
well maybe i eat crow on using the 12au7-irfp9140 pair for the final.
Yes it works but maybe a bad engineering decision to generate so much waste heat. A ccs load is somewhat of an improvement. A quasi-A is another alternative.
So having an excellent valve-fet pre-amp driver and in a hurry; I broke open my sample box of class-d Asia YJ modules.
fortunately I'm very familiar with the TI and IR class D families.
The YJ "200" watt module is very compact , so far no reliability issues.
I ordered some more today from different sellers for lot comparision.
Changed some smt componets to match my supply no problem.
I will run in 50W and 10W configurations.
Definetly will reduce the gain. No clipping in final section allowed.
So we'll see.
Right now the last posted .61 schematic is current.
here is pic with heat sink removed.
here is yj link but is sold for $ 16-24 qty 1.
https://www.yuan-jing.com/ClassD-T/irs2092-class-d-mono-amplifier-board-200w
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well maybe i eat crow on using the 12au7-irfp9140 pair for the final.
Yes it works but maybe a bad engineering decision to generate so much waste heat. A ccs load is somewhat of an improvement. A quasi-A is another alternative.
So having an excellent valve-fet pre-amp driver and in a hurry; I broke open my sample box of class-d Asia YJ modules.
fortunately I'm very familiar with the TI and IR class D families.
The YJ "200" watt module is very compact , so far no reliability issues.
I ordered some more today from different sellers for lot comparision.
Changed some smt componets to match my supply no problem.
I will run in 50W and 10W configurations.
Definetly will reduce the gain. No clipping in final section allowed.
So we'll see.
Right now the last posted .61 schematic is current.
here is pic with heat sink removed.
here is yj link but is sold for $ 16-24 qty 1.
https://www.yuan-jing.com/ClassD-T/irs2092-class-d-mono-amplifier-board-200w
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another update
Have the class-d setup for high power real time analyzing. Threw together a pad/filter box with overload protect to the sound card UR22.
I reduced the gain of power module to 4 so that the hybrid pre can really sing loud.
Now moving back to the 12AU7/fet pre.
pic of some testing, plots. Note these are at low power , the UR22 cannot really output high line levels.
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Have the class-d setup for high power real time analyzing. Threw together a pad/filter box with overload protect to the sound card UR22.
I reduced the gain of power module to 4 so that the hybrid pre can really sing loud.
Now moving back to the 12AU7/fet pre.
pic of some testing, plots. Note these are at low power , the UR22 cannot really output high line levels.
.
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i'll put something together, bits and pieces are all over diyaudio.
Its spread out because no hybrid section.
Ran with fat Telecaster sweet. humbuckers did not run out of headroom.
Running in hifi mode now. driving two uniQ Kefs in parallel 3 ohm z.
Red Fang 8 ohm with Telecaster.
Added a S2M 1/8" jack near 1/4" input. Of course cant have iRiver and Tele pluged same time.
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V0.91-HIFI
I'll put up the hifi version here. Its been a lot of fun, used many different bookshelf type speakers , the Kef's were best.
I'm cutting off the share here, music instrument version will keep closed.
This schematic works super with values shown , avoids clipping even with a high input line level.
Bruce
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I'll put up the hifi version here. Its been a lot of fun, used many different bookshelf type speakers , the Kef's were best.
I'm cutting off the share here, music instrument version will keep closed.
This schematic works super with values shown , avoids clipping even with a high input line level.
Bruce
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