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Official M2 schematic
Official M2 schematic
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Old 4th August 2018, 12:16 PM   #2921
asanden is offline asanden  Netherlands
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Finished two identical M2's over the last months for my Markaudio CHP70 MTM speakers driven by a DSP (and later a LXmini with Nelson's XO...).
Tried to minimize internal wiring, Teabag boards, chassis U3x400, Toroidy 500VA 18VAC. Still thinking about changing to the M2X mountain view drive stage...

The DSP contains an Odroid C2, MiniDSP 2x4hd, 2 DCB1's
Great sound overall, I like the non feedback based M2.
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Old 4th August 2018, 12:22 PM   #2922
Soundhappy is offline Soundhappy  France
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@ Asanden
Fantastic & Cute M2 build Congratulations!
MPC74 are extraordinary source resistors
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Old 4th August 2018, 12:39 PM   #2923
asanden is offline asanden  Netherlands
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Thanks. B.t.w. Used Toshiba outputs
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Old 4th August 2018, 01:08 PM   #2924
kbergsson is offline kbergsson  Iceland
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Very nice amps sov and asanden. Mine is getting there. More about function than beauty My F6 is more elegant. M2 might sound better, I dont know yet.
Quite crowded migth get some hum. Have now testet power supply -Ok!
Drilled and tapped M3 holes, uneventful but tedious. Need to drill backplate and test sides - so soon hopefully I can listen to M2 ( that is if I dont fry any components )
IMG_1404.jpg

IMG_1406.jpg

Last edited by kbergsson; 4th August 2018 at 01:17 PM.
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Old 4th August 2018, 01:09 PM   #2925
Russellc is offline Russellc  United States
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Official M2 schematic
Quote:
Originally Posted by Skylar88 View Post
Thanks for that. I somehow missed it.



Thanks for the advice. Yeah, it's a lot of work to read entire threads and I'm usually sidetracked before I'm halfway through.

Building the amp is the easy part.

.
It is a lot of work, that's the DIY aspect! That said, its a lot less work than diving in with mistaken ideas already assembled, then having to figure out what went wrong, then all the time and trouble to undo what you spent time on first, tearing up the board and killing components in the process.

Unfortunately, DIY here really isnt an all parts included and step by step instructions...that said, 6L6 build guides are the bomb just for casual reading, as a lot of these amps construction is the same (as in power supply) or similar, as is layout etc.

The Amp Camp is only one with an all parts included option, and there is a 6l6 build guide for it. Otherwise you have to figure out what is needed. If you read the threads you will generally find where a few other people have asked most if not all the questions you will have. Ask a few questions for clarity, and you have a full understanding of the project. Next one is easier.

Russellc
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Old 4th August 2018, 02:46 PM   #2926
kbergsson is offline kbergsson  Iceland
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sov, like your led solution might copy that.
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Old 4th August 2018, 03:03 PM   #2927
sov is offline sov  Sweden
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Quote:
Originally Posted by kbergsson View Post
sov, like your led solution might copy that.

Drill holes in bottom plate or perhaps use a piece of plexiglass to spread the light.
I have wondered what the next step I PSU would be. Your looks promising. I have an idea of dual mono in separate case with Neutrik connections to amp case.
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Old 4th August 2018, 03:14 PM   #2928
kbergsson is offline kbergsson  Iceland
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Thanks . I have also been thinking on similar solutions, i.e. regarding supplies in separate cases. Its quite usual in diy valve amps because of all the heavy iron.
Quote:
Originally Posted by sov View Post

Drill holes in bottom plate or perhaps use a piece of plexiglass to spread the light.
I have wondered what the next step I PSU would be. Your looks promising. I have an idea of dual mono in separate case with Neutrik connections to amp case.

Last edited by kbergsson; 4th August 2018 at 03:17 PM.
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Old 9th August 2018, 01:51 PM   #2929
dewdrop is offline dewdrop  Singapore
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Which sets of Jfets idss 7.6mA or 8.5mA would be preferred for the M2?

TIA
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Old 11th August 2018, 09:22 AM   #2930
Twst is offline Twst  Norway
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And I have a working stereo set!
Thanks goes out to Nelson for everything and Tea-Bag for boards. And everyone else giving proper motivation and inspiration

Only thing missing is the shield on the right channel input transformer, but it doesn't really seem nescessery - so it will have to wait
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