Hello,
did anybody has build the mono amp which was show in
several Stereoplay articels in 1988 frpm Günther Mania ??.
http://www.avm-audio.com/
I have the article as PDF and I like to bulid an amp in that way.
Does anybody wnat to have the articel an or can help me.
best regards
Klaus
did anybody has build the mono amp which was show in
several Stereoplay articels in 1988 frpm Günther Mania ??.
http://www.avm-audio.com/
I have the article as PDF and I like to bulid an amp in that way.
Does anybody wnat to have the articel an or can help me.
best regards
Klaus
Hello Pytha2001,
i have built the Amp in 1996. I had the luck to get the original schematics from the first Monoblock they sold commercially.
It is different from the one which was in the stereoplay. I also built the stereoplay version but it didn't work.
In the original schematics there are 2 modules. One is the protection circuit, the other is for dynamic DC compensation.
You don't see the schematic it's only decribed as module (you see a black box in the scheme)
I took the DC thing from elektor, and the protection circuit i developed on my own. I was very proud on it, because it works without relay at the output, just the AVM philosophy.
Don't ask me for pics, i have no digi cam.
Since 1996 they work very well, and the protection circuit hat no reason to work until now.
Regards Markus
PS: I registered only to reply this thread. I haven't done anything with electronics the last years. When you've built a house, there are other things to work on. Sorry for my bad english
i have built the Amp in 1996. I had the luck to get the original schematics from the first Monoblock they sold commercially.
It is different from the one which was in the stereoplay. I also built the stereoplay version but it didn't work.
In the original schematics there are 2 modules. One is the protection circuit, the other is for dynamic DC compensation.
You don't see the schematic it's only decribed as module (you see a black box in the scheme)
I took the DC thing from elektor, and the protection circuit i developed on my own. I was very proud on it, because it works without relay at the output, just the AVM philosophy.
Don't ask me for pics, i have no digi cam.
Since 1996 they work very well, and the protection circuit hat no reason to work until now.
Regards Markus
PS: I registered only to reply this thread. I haven't done anything with electronics the last years. When you've built a house, there are other things to work on. Sorry for my bad english
Hallo Markus und Klaus
Although I would prefer to write in German, I don’t know if it is more appropriate to write in English in this forum? I’m a newbie...
@Klaus
I have stored this article since 15 years and, after getting a little more time again, would also like to start this project. But it doesn't seem that a lot of people have build this amp. I found only this:
http://groups.google.ch/groups?hl=d...450917%40p12.f308.n2461.z2.fidonet.org&rnum=1
@ Markus
Could you also send me the schematics of the “alternative” circuit? Is this circuit completely different? From what I knew, it should not have been that much different.
Ehm, what about your protection circuit? I know, it’s your own stuff..
..can you explain something about that?
And, what kind of problems did you experience with the basic design? Did you use a DIY PCB, or a breadboard?
I tried to start a thread at http://www.stereo.holgerbarske.com/...tyleid=1&sid=f5ace31290d6f6cecdc6679281460681
and
http://www.hifi-forum.de/index.php?action=browseT&back=2&sort=lpost&forum_id=29&thread=2507
but with low success.
Perhaps here we will find some more people interested in a discussion?
Grüsse
Tino
Although I would prefer to write in German, I don’t know if it is more appropriate to write in English in this forum? I’m a newbie...
@Klaus
I have stored this article since 15 years
and, after getting a little more time again, would also like to start this project. But it doesn't seem that a lot of people have build this amp. I found only this:http://groups.google.ch/groups?hl=d...450917%40p12.f308.n2461.z2.fidonet.org&rnum=1
@ Markus
Could you also send me the schematics of the “alternative” circuit? Is this circuit completely different? From what I knew, it should not have been that much different.
Ehm, what about your protection circuit? I know, it’s your own stuff..
..can you explain something about that?And, what kind of problems did you experience with the basic design? Did you use a DIY PCB, or a breadboard?
I tried to start a thread at http://www.stereo.holgerbarske.com/...tyleid=1&sid=f5ace31290d6f6cecdc6679281460681
and
http://www.hifi-forum.de/index.php?action=browseT&back=2&sort=lpost&forum_id=29&thread=2507
but with low success.
Perhaps here we will find some more people interested in a discussion?
Grüsse
Tino
Hallole,
I didn't build this amplifier but a similar self-designed at that time.
In stereoplay magazine, some readers complained about sharp hights at high levels but were happy about great bass control at all output levels. The amplifiers were said to be precise with a tendency to sharpness. Same with my amps....
The problems with the mosfets is that they very easily oscillate. In my amp very small gate resistors of 10 ohms (if I remember correctly) and a new layout stopped the oscillation.
In the AVM design, no explicit compensation capacitors are used. But in deed they are in, because the collector to base voltage of the input transistors is 0 Volt and so the collector to base capacitance is about 20pF (as I remember correctly).
In my opinion the amplifier I buid is good for techno or heavy metall and I expect the AVM to be the same.
Grüssle
Peter
I didn't build this amplifier but a similar self-designed at that time.
In stereoplay magazine, some readers complained about sharp hights at high levels but were happy about great bass control at all output levels. The amplifiers were said to be precise with a tendency to sharpness. Same with my amps....
The problems with the mosfets is that they very easily oscillate. In my amp very small gate resistors of 10 ohms (if I remember correctly) and a new layout stopped the oscillation.
In the AVM design, no explicit compensation capacitors are used. But in deed they are in, because the collector to base voltage of the input transistors is 0 Volt and so the collector to base capacitance is about 20pF (as I remember correctly).
In my opinion the amplifier I buid is good for techno or heavy metall and I expect the AVM to be the same.
Grüssle
Peter
here are the diy instructions about webarchive:
Internet Archive Wayback Machine and jpg file about
http://web.archive.org/web/20050123053141/http://bernhard.nerz.bei.t-online.de/Messwerte.jpg
I have found this advice and the old original, currently no longer existing URLs about the forum
http://www.visaton.de/vb/archive/index.php?t-6049.html
go to post from BN from 14.11.2003, 18:42
about #73 from
http://www.diyaudio.com/forums/solid-state/88515-cfp-vas-8.html
you find a schematic version from me
Last edited:
by post #4 about
http://www.diyaudio.com/forums/soli...ody-burmester-avm-schematics.html#post2598494
you will find the scanned schema created by Mr. Günter Mania from German's HiFi magazine "Stereoplay".
http://www.diyaudio.com/forums/soli...ody-burmester-avm-schematics.html#post2598494
you will find the scanned schema created by Mr. Günter Mania from German's HiFi magazine "Stereoplay".
check out also this thread (similar circuit topology):
http://www.diyaudio.com/forums/soli...w-dc-10mhz-1000v-amplifier-3.html#post5315763
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