Running 20v secondaries here, nema problem like ZM predicted. It's really nice sounding amp 🙂
Place the big noisy magnetically leaky power transformer away from the signal transformers.
I'm going to build my amps with this "on end" method from here on out. Just wondering if the transformer radiates any differently from top or bottom. I was thinking having the side of the transformer that the wires came out of facing the front panel. Why, I have NO idea...is there a difference? I have nothing to back this up with, and it could be worse for all I know?
For most of my First Watt clones, I have used Antek 500VA, with the exception of F5, which I built dual mono with two 300VA Anteks. Hoping there is enough height in Deluxe 4U for 500 VA unit to stand on end.
Russellc
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I was talking to somebody about that quite recently and yes, it does make a difference, and yes, having the wires face front (away from circuitry) seems to be the best orientation.
How do I mount the Edcor trafos on the PCB boards, is there any specific orientation? I see that there is nothing mentioned like '1' on the transformer but I see that listed on the PCB board.
Thanks
Thanks
It fits both ways as I tried and I think you are talking about the daughter boards when you say fits only one way. Thats true with the small daughter (input stage) boards but not with Edcor transformer. Pin spacing is exact and hence fits both ways. I saw a comment somewhere in the thread that try and see which side it fits and go for it but was not sure.
thanks
Edcor has downloadable mechanical drawings on their website. Here is a .pdf LINK
The relevant portion is shown below. Notice how pins 1 and 2 are spaced closer together, than any other pair of adjacent pins. The M2x PCBoards match this asymmetrical pin arrangement.
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The relevant portion is shown below. Notice how pins 1 and 2 are spaced closer together, than any other pair of adjacent pins. The M2x PCBoards match this asymmetrical pin arrangement.
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Attachments
Korg B1 Daugher Board
How about offering a B1 front end for the baby.
Might be kind of fun to have a real triode daugher card
that won't cause the trouble of all the stuff required of
at 300B triode front end.
Just a thought which crossed my mind.
Anyone thought about just making the FirstWattM2 Power Supply
available on a PCB? If it is not already done and N.P. doesn't mind?
It would be kind of nice, immunity is a good thing.
Cheers,
How about offering a B1 front end for the baby.
Might be kind of fun to have a real triode daugher card
that won't cause the trouble of all the stuff required of
at 300B triode front end.
Just a thought which crossed my mind.
Anyone thought about just making the FirstWattM2 Power Supply
available on a PCB? If it is not already done and N.P. doesn't mind?
It would be kind of nice, immunity is a good thing.
Cheers,
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I encourage you to build exciting new daughter cards and try them in your M2x. That's what Do It Yourself is all about! The mechanical interface is simple, see the attachment to post #56. The electrical interface is also simple, see the attachments to post #1.
Design it, build it, debug it on your lab bench, and when it works: drop it into your M2x and feel the extreme satisfaction of a project accomplished.
Design it, build it, debug it on your lab bench, and when it works: drop it into your M2x and feel the extreme satisfaction of a project accomplished.
Sync- if you want to make a PSU board I’d love to have one in the store! Drop me a PM and we can coordinate. 🙂
Starting the chassis layout and working on final wire-up plans. Please, can anyone point me to location of proper testing methodologies and procedures to go from this stage to working M2 Amp?
-Ses
-Ses
