The diyAudio First Watt M2x

[Morde]

Wohoo! My first Papa amp is putting out some tunes. Better sonic analysis only after my hype has settled down a bit...

Thanks to Mr. Pass for publishing these gems and to Mark Johnson and 6L6 for the guides and instructions.

I attached a few pics of my build. The case and trafo are both from Toroidy.pl. The total cost was approx. 800€ with some extra resistors and other minor parts. I installed the slow start and speaker protection boards too.

 

[deafbykhorns]

Nice build, that is the circuit board mounted on rear panel?

 

[tubesguy]

Hah, I think it's a reflection in the pretty transformer cover.

 

[Morde]

There is the diyAudio soft start board on the back panel.

 

[6L6]

Beautiful construction, congratulations!! Very well done!!

Now you can sit back and enjoy the music, may the amplifier bring you many, many smiles!

 

[JSA1971]

Wohoo! My first Papa amp is putting out some tunes. Better sonic analysis only after my hype has settled down a bit...

Thanks to Mr. Pass for publishing these gems and to Mark Johnson and 6L6 for the guides and instructions.

I attached a few pics of my build. The case and trafo are both from Toroidy.pl. The total cost was approx. 800€ with some extra resistors and other minor parts. I installed the slow start and speaker protection boards too.

Well done and Nice build! Enjoy the music!

 

[darrr]

Wohoo! My first Papa amp is putting out some tunes. Better sonic analysis only after my hype has settled down a bit...



Thanks to Mr. Pass for publishing these gems and to Mark Johnson and 6L6 for the guides and instructions.



I attached a few pics of my build. The case and trafo are both from Toroidy.pl. The total cost was approx. 800€ with some extra resistors and other minor parts. I installed the slow start and speaker protection boards too.

Case from toroidy.pl? Their front panels has four screws. How you disappeared it?

 

[davidjt]

Tap & die + standoffs?

 

[Dennis Hui]

Very nice build Morde!

So....what are you building next?

 

[Morde]

Case from toroidy.pl? Their front panels has four screws. How you disappeared it?

Actually it was a pleasant surprise that there were no visible screws on the front. I know the pictures on their website show the screws.

 

[ItsAllInMyHead]

Wohoo! My first Papa amp is putting out some tunes. Better sonic analysis only after my hype has settled down a bit...

Congratulations! Gorgeous build.

 

[Mixi]

looks fantastic!

 

[Morde]

Very nice build Morde!

So....what are you building next?

I did drill the sinks according to the diyAudio UMS so I'm all set for future endeavors too...

One issue has arisen in a form of hummmm/buzzzz... I'll plug in a scope to the speaker terminals to see is it a 50 or 100Hz disturbance. Or something else.

The first remedy that came to my mind is to move the speaker return wire from amp pcb output ground to PSU board's ground.

 

[Morde]

I attached a scope shot from output terminals while input RCA connectors plugged in. There definately seems to be some buzzing going on @100Hz. Most of the buzz disappears when I unplug the input connectors.

 

[dBel84]

Ground loop? At least this is easier to address than primary amplifier noise. Good luck.. dB

 

[Morde]

I'm not sure if it's a ground loop, since the buzz is there even if I feed the amp via iPhone headphone connector? And I suppose the frequency would be 50Hz and not 100Hz if it were a ground loop.

 

[El Reino]

I just finished my M2x and have little bit hum too. I think that edcors picking power tranny hum. So my next step is to try Mumetal shielding.

 

[Morde]

I managed to reduce the hum so that it is not audible to my listening position. I tested with temporary wires between L/R input grounds and between L/R speaker grounds and it seemed to do the trick.

 

[zman01]

Morde,

Saw your post and pictures of your M2X - very nice build, congratulations!

 

[joshvito]

Wohoo! My first Papa amp is putting out some tunes. Better sonic analysis only after my hype has settled down a bit...

Thanks to Mr. Pass for publishing these gems and to Mark Johnson and 6L6 for the guides and instructions.

I attached a few pics of my build. The case and trafo are both from Toroidy.pl. The total cost was approx. 800€ with some extra resistors and other minor parts. I installed the slow start and speaker protection boards too.

Ooh, this is a nice tidy build. COngratulations.
What did you use for output transformers? I've been considering this as a next project, but didn't see a good US source for the edcor transformers in the parts list.