Absolutely - that’s a prerequisite!
Also. I’m leapfrogging v1.0b and on to v1.0c. Fixing grounding and few other things. I’ll post screen shots from gerber viewer when I’m closer.
Sign me up too
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sign up list:
6L6
PKI - 2 (A and B)
wg45
mordikai- 2
gary s - 2 off.
dBel84
CodyT
Dr_Strangelove
Randy,
I would jump on this, because the boards I’ve already gotten from you have been beautiful. I just don’t have a project in the que for them.
I would jump on this, because the boards I’ve already gotten from you have been beautiful. I just don’t have a project in the que for them.
Looks cool!
I want to make PSU board someday but not anytime soon.
Not until I uderstand hot to do it correctly and a few little tricks.
I have a question.
I see you did copper zones with thermal relief setteings.
But now every pads in copper zones are thermal relief.
Should input/output high current pads be so?
Or maybe beter make those pads solid with copper?
I want to make PSU board someday but not anytime soon.
Not until I uderstand hot to do it correctly and a few little tricks.
I have a question.
I see you did copper zones with thermal relief setteings.
But now every pads in copper zones are thermal relief.
Should input/output high current pads be so?
Or maybe beter make those pads solid with copper?
I’m curious if anyone had done any direct comparisons between a stereo decoupled PSU (like the one rthatcher has shown here) and a typical dual mono setup? Certainly having dedicated trafos and ground (NTC isolated) per channel is beneficial, but I wonder how close the decoupled stereo gets in performance? Thinking specifically about channel separation, stereo imaging, etc
properly done, they're close
but not the same
one of important reasons for doing it dual mono, or monoblocks ( depending which arrangement in space your prefer, or how old you are) is - nothing less and nothing more - width of your green
one can go fishing with cheapest gear, another one is going with most expensive one
as long both are happy, no reason to look at gear....... except when bragging, for mutual fun
disclaimer - if one is going to use amps constantly just under the clipping levels, differences between mono and common PSU are getting bigger
but somehow, I'm not seeing much examples of ppl around having setups like these
edit: direct reply on your puzzle, even if I didn't made comparison exactly side by side:
whenever I made some final prototype on my T-Bed , common PSU with caps of age, drek wires ....... and I get something sounding real Spooky ..... later - when I made same amp proper as dual mono in case, it sounds Spoooooooooky!
last few ounces are toughest/most expensive to get..... from anywhere, everywhere
is that cost effective ?
as Pa said numerous times - let's twist it - in case of Dialysis, we could measure some things ( how fast, how good) , but in case of audio thingies, all we can is take a look in Da Mirror, to see how big smile Dodo is wearing
but not the same
one of important reasons for doing it dual mono, or monoblocks ( depending which arrangement in space your prefer, or how old you are) is - nothing less and nothing more - width of your green
one can go fishing with cheapest gear, another one is going with most expensive one
as long both are happy, no reason to look at gear....... except when bragging, for mutual fun
disclaimer - if one is going to use amps constantly just under the clipping levels, differences between mono and common PSU are getting bigger
but somehow, I'm not seeing much examples of ppl around having setups like these
edit: direct reply on your puzzle, even if I didn't made comparison exactly side by side:
whenever I made some final prototype on my T-Bed , common PSU with caps of age, drek wires ....... and I get something sounding real Spooky ..... later - when I made same amp proper as dual mono in case, it sounds Spoooooooooky!
last few ounces are toughest/most expensive to get..... from anywhere, everywhere
is that cost effective ?
as Pa said numerous times - let's twist it - in case of Dialysis, we could measure some things ( how fast, how good) , but in case of audio thingies, all we can is take a look in Da Mirror, to see how big smile Dodo is wearing
Last edited:
I'd like a go. Currently finally building my sony vfet kit
sign up list:
6L6
PKI - 2 (A and B)
wg45
mordikai- 2
gary s - 2 off.
dBel84
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vanofmonks
sign up list:
6L6
PKI - 2 (A and B)
wg45
mordikai- 2
gary s - 2 off.
dBel84
CodyT
Dr_Strangelove
vanofmonks
Thanks ZM! I think your ‘last few ounces’ analogy is spot on - with this, and just about everything else.
I did a bunch work yesterday. Thanks for the comments on the thread, and thanks to Twitchie for input and being a sounding board!
Changes include:
Updated grounding. The point between left and right sides of the board opposite the rectifier inputs is now the star point. V1.0a the U point was on the side with diode inputs. I also adjusted the fills for output ground to only connect towards the star side of the board. It's similar to the layout Jeff used. Ain't broke, dont' fix.
Order of outputs (not a big deal) changed, so did A/C layout (also not a huge deal).
I updated so all of the +/- outputs are direct from cap pins, not from the planes/fills.
I reworked A/C. Track size 2.5mm. Track clearance 2mm. Moved connection points. Note Rev A does not meet this clearance everywhere.
Added another point to attach antek / transformer shield wire to chassis ground.
Thermal relief connections upsized to 1mm. They should easily handle the current of these amps.
This is what's going to fab. For some reason the 2 vias look small on this gerber viewer. They look good in Kicad. I'm putting a note the fab...
Thanks for beta testers signing up! I can add a couple more.
Changes include:
Updated grounding. The point between left and right sides of the board opposite the rectifier inputs is now the star point. V1.0a the U point was on the side with diode inputs. I also adjusted the fills for output ground to only connect towards the star side of the board. It's similar to the layout Jeff used. Ain't broke, dont' fix.
Order of outputs (not a big deal) changed, so did A/C layout (also not a huge deal).
I updated so all of the +/- outputs are direct from cap pins, not from the planes/fills.
I reworked A/C. Track size 2.5mm. Track clearance 2mm. Moved connection points. Note Rev A does not meet this clearance everywhere.
Added another point to attach antek / transformer shield wire to chassis ground.
Thermal relief connections upsized to 1mm. They should easily handle the current of these amps.
This is what's going to fab. For some reason the 2 vias look small on this gerber viewer. They look good in Kicad. I'm putting a note the fab...
Thanks for beta testers signing up! I can add a couple more.
Attachments
I didn’t read the first post well enough. Didn’t read this was for beta testers. Thought this was a GB. So I removed my name.
sign up list:
6L6
PKI - 2 (A and B)
wg45
gary s - 2 off.
dBel84
CodyT
vanofmonks
sign up list:
6L6
PKI - 2 (A and B)
wg45
gary s - 2 off.
dBel84
CodyT
vanofmonks
While I don't 'qualify' as a beta tester the more I look at this design the more I'm intrigued by it. If there is a group buy or any excess boards make it to the swap meet I'll be first in line.
Nice work!
Regards,
Dan 🙂
Nice work!
Regards,
Dan 🙂
Dear all,
PCB's arrived. After making the update I've decided I'm not sending out rev A. I have 15 boards. I can send 2 of the rev b board to all of you to play with. Or let me know if one will work and I'll hold the rest for anyone else who wants to jump in. PM me with your shipping info and paypal info. I'll ask enough to cover shipping, please. Should be ~$4 in US. Those on the other side of the planet will be more...
@CodyT - I'll put this in with the J2 boards.
beta testers
6L6
PKI - 2 (A and B)
wg45
dBel84
CodyT
vanofmonks
gary s - 2 off.
PCB's arrived. After making the update I've decided I'm not sending out rev A. I have 15 boards. I can send 2 of the rev b board to all of you to play with. Or let me know if one will work and I'll hold the rest for anyone else who wants to jump in. PM me with your shipping info and paypal info. I'll ask enough to cover shipping, please. Should be ~$4 in US. Those on the other side of the planet will be more...
@CodyT - I'll put this in with the J2 boards.
beta testers
6L6
PKI - 2 (A and B)
wg45
dBel84
CodyT
vanofmonks
gary s - 2 off.
Attachments
Great news! Thank you do much! Yes I will still get two if possible. Let me know your PayPal. If you also have those small boards for AC in let me know, I’d buy couple as well. Thank you again!
I'd try a pair of boards if you've got extra. I probably would not have them assembled till next month though.
Great job on the boards Randy!!!
If anyone is planning on taking noise measurements, could you please describe your testing/measurement setup and methodology and plenty of nice pictures are sure to get lots of 'fugly's
Fugly!
If anyone is planning on taking noise measurements, could you please describe your testing/measurement setup and methodology and plenty of nice pictures are sure to get lots of 'fugly's
Fugly!
