This is a group buy for circuit boards to make a diy clone of the First Watt F3 amplifier. This board set is designed to work with the diyAudio store UMS mounting pattern making life a little easier for those having UMS chassis.
The design is about 80% done and now it is time to gather input and make refinements before ordering a test set of boards to validate the layout.
The images below show the basics, and the .pdf has more details about the boards, preliminary pricing, and a tentative schedule for the group buy.
Here is a link to the F3 UMS Pattern Group Buy Sign Up Sheet
I will make every effort to post weekly status updates to share progress.
The design is about 80% done and now it is time to gather input and make refinements before ordering a test set of boards to validate the layout.
The images below show the basics, and the .pdf has more details about the boards, preliminary pricing, and a tentative schedule for the group buy.
Here is a link to the F3 UMS Pattern Group Buy Sign Up Sheet
I will make every effort to post weekly status updates to share progress.
Attachments
csample,
What a well described pdf sheet and group buy! This is very well done
. The only thing I would comment on is a link to the First Watt F3 info for newbies on your first post for those unfamiliar with this design.
Come to think of it, with a damping factor of 6, overall gain of ~ 13dB, this would make a very nice headphone amp I bet.
So close...but I have sooo many projects!
Best,
Anand.
What a well described pdf sheet and group buy! This is very well done
. The only thing I would comment on is a link to the First Watt F3 info for newbies on your first post for those unfamiliar with this design. Come to think of it, with a damping factor of 6, overall gain of ~ 13dB, this would make a very nice headphone amp I bet.
So close...but I have sooo many projects!
Best,
Anand.
Last edited:
Just curious, are you including option for aleph current source, or feedback? There are some improvements to gain. Please see fig8.
https://www.passdiy.com/pdf/ZV9.pdf
https://www.passdiy.com/pdf/ZV9.pdf
As nautiboy noted, the spreadsheet should be working now I had forgotten to change the permissions from read only to edit - sorry about that.
Hi Adason, thanks for bringing up the Zen V9 Aleph current source and feedback, I think the standard F3 has both of these elements. I highlighted what I think are equivalent parts of the Zen V9 and F3 circuits, if I missed something please let me know, I love adding versatility to the boards to allow for more tweaking and build options.
Thanks for all the positive comments, I will be refining the boards over the next two weeks, if you have other thoughts or comments I will try to accommodate provided there is a broad enough interest and the changes are manageable.
Hi Adason, thanks for bringing up the Zen V9 Aleph current source and feedback, I think the standard F3 has both of these elements. I highlighted what I think are equivalent parts of the Zen V9 and F3 circuits, if I missed something please let me know, I love adding versatility to the boards to allow for more tweaking and build options.
Thanks for all the positive comments, I will be refining the boards over the next two weeks, if you have other thoughts or comments I will try to accommodate provided there is a broad enough interest and the changes are manageable.
Attachments
