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Old 27th September 2013, 09:46 AM   #11
tinitus is offline tinitus  Europe
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received my MDA-400 today
(I suppose everyone have got their promotion test module now)

thanks Roberto


module assembling looks very high quality
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File Type: jpg IMG_9892.JPG (217.0 KB, 359 views)
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Old 27th September 2013, 09:54 AM   #12
weskoki is offline weskoki  Europe
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What is the green board for?
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Old 27th September 2013, 12:24 PM   #13
AP2 is offline AP2  Italy
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Quote:
Originally Posted by weskoki View Post
What is the green board for?
Hi, As PBTU-IM black input board stereo version, maybe Tinitus use for other.

Well..Weskoki, when try to listen your MDA??
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Old 27th September 2013, 03:10 PM   #14
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by AP2 View Post
Hi, As PBTU-IM black input board stereo version, maybe Tinitus use for other.
ahh, a stereo version of the black input board
(I was going to ask about those green boards)
could be for the 2-channel pre I was doing for bass guitar
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Old 27th September 2013, 08:20 PM   #15
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I had the next listening session this week and I got to some interesting conclusions and by the end of the week I hope to be able to show you some pictures of what I have done so far, I just need some time and a new camera as the old Olympus died today

My idea is to use less words but with more meaning and that requires thinking So far the amps have been a complete joy regarding operation - they measure almost perfectly identical, have been turned on/off and connected and disconnected hundreds of times and never had any problems - indeed a mature design, congratulations, Roberto!
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Old 28th September 2013, 08:47 AM   #16
tinitus is offline tinitus  Europe
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ok, some time ago I got a used 19" pro rack box from a friend

plenty of space for other fun stuff
like a small mic pre, etc
and the onboard aux +/-12V might be convenient for that

seems easy with plenty space available
but nothing is never that simple, is it

well, I decided to make a small sub bottom plate for it
but now I have no clew how to mount a heatsink (I have two)

there are two small holes, but no thread
I might manage to cut threads without getting alu bits all over the board

but one hole is covered by a transistor
any ideas ?
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Old 28th September 2013, 08:58 AM   #17
AP2 is offline AP2  Italy
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Quote:
Originally Posted by tinitus View Post
ok, some time ago I got a used 19" pro rack box from a friend

plenty of space for other fun stuff
like a small mic pre, etc
and the onboard aux +/-12V might be convenient for that

seems easy with plenty space available
but nothing is never that simple, is it

well, I decided to make a small sub bottom plate for it
but now I have no clew how to mount a heatsink (I have two)

there are two small holes, but no thread
I might manage to cut threads without getting alu bits all over the board

but one hole is covered by a transistor
any ideas ?
Oh, clean frame
You can use the two holes (2.6 mm Diam. allow tapping screw directly with 3MA), it is best to use only one screw to create the thread, very simple with a bit of oil.
The thickness of the bar is 8mm, it is enough that you calculations 6mm deep (good even 4mm).
also calculate that the heatsink remains lifted from the base.
In reality, the MDA-400 does not require a heatsink,or use "L" shape.

Last edited by AP2; 28th September 2013 at 09:07 AM.
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Old 28th September 2013, 11:27 AM   #18
AP2 is offline AP2  Italy
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Default How do I connect a remote control 2x MDA-400?

Very simple,check well 230Vac phase connection also (very important!!)

Regards

To Nikola: thanks for your nice words

About components and repeatability of the characteristics:
We follow the production and MDI is in charge of purchasing and testing the components.
Therefore, the services mounted only our components. you can check on all the products, the same serial number.
this is a great difference in favor of the final quality.
Many rightly do not know how much work is behind a product and maybe they think that it is mounted as a diy.
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Last edited by AP2; 28th September 2013 at 11:33 AM.
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Old 30th September 2013, 12:48 PM   #19
tinitus is offline tinitus  Europe
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managed to mount amp module on heatsink and sub plate
quite complicated work making all the holes fit

making chassis holes for plugs etc
and discouvered a small problem with input board
att pot and XLR plug is not in line with each other
XLR mounting surface is behind board edge
pot is correctly mounted

I will have to make a subplate for mounting
may actually have been intended, but I don't know

edit
well, simple solution is to use spacers on XLR plug
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File Type: jpg IMG_9956.JPG (214.5 KB, 130 views)
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Old 30th September 2013, 01:31 PM   #20
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Hi Tinitus,

They do align, you have to make a hole big enough for the XLR to go trough from the inside. Look at the XLR jack screw sockets, they align with the encoder's frame.

Ciao!
Do
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