The diyAudio First Watt M2x

All these fine input boards could be used as generel purpose input buffers. Eg. Ishikawa is more or less a "mono" B1-buffer? .....so a dual-mono construction can be built.
If electrical and mechanical interface is made then these boards can be used same way as B1-buffer is used and boards can be swapped to evaluate sound with other power amps?
 
Question:
I am about to complete my Mtn. View IPS boards. When I opened the bag for J112, I got this.
Checking the data sheets, BC550 is a BJT not a JFET. Will it work?
 

Attachments

  • IMG_1800.jpg
    IMG_1800.jpg
    452 KB · Views: 400
It seems a bit expensive pr. J112 device to buy only two?
I would get maybe 100 or where there is a good price drop pr. device. Also these JFETs needs a match in many cases so good to have some to select from.

This is probably the problem if just sending the pre-fabricated "Mouser BOM"?
 
There seems a consensus that the M2x is an ideal pairing for my new B1Korg. But the store is out of M2x PCBs. I’m considering ordering the F6 package, building it in a 4U-300 chassis with the usual PSU board, and then swapping in the M2x boards when they become available. Is that a reasonable plan? Winter is coming. I need a project.
 
While waiting for M2x boards to be back i n stock,I thought of ordering the IPS6 and IPS7 boards at the pcb maker.
Then I thought maybe someone else is interested in them 2.
So If youre intessted in them please write so and I´ll order boards for you to.
We will figure out later the price off the package and stamps.
 
Will not work. Ask Mouser Team peoples is an error, they need shipp you J112 🙂 Good luck

I’ll be interested in their reply. When I built my Pearl 2 in the spring, Mouser twice sent me the same two similar parts in the wrong bags. So two different pulls, same error. I never heard back from them after emailing support.


I got two emails from Mouser, promptly. Since the part is not available anymore, I was given an option for refund for credit or treat it as backordered item with availability in February 2021. I only ordered a pair and combined, cost less than a dollar. I choose credit, then ordered from a competitor instead.
 
No. The cards have to be buffers because there is no attachment to ground.



That said, I suspect that a new board, with Norwood configured just a little differently and the F6 output stage together would be an incredible amp. The Nor6. 🙂 🙂 🙂

(I happen to really like Norwood, so the idea is quite interesting.)
 
Norwood... after all the swapping and trials, I dropped the Woods in the monos and installed them in the music room. It was a very close fight, but overall, they seemed to be the best for whatever I threw at it, not the best for all, but the best overall. 😎
 
Last edited:
Swapped the Norwood boards. Wind instrument sounds so real with the Norwood in my system!
Now I understand why there are 4 hex metal screws (black, M3) that will remain in the plastic bag from the diyaudio chassis kit after building and listening to the M2X.