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Joined 2002
Could you post them? I think I want to build this as well, but might want to play with adding a rotary encoder, etc. This would be new ground for me, so adding it to an existing board would be nice. Thanks.
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Joined 2002
I love eagle. Can you email me them eagle files. Id like to share my regulated 15V regulator also with this project..
Jason
Jason
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Joined 2002
Gcollier said:
BUF634T has a x2 on it is that mean they are stacked on top of each other ?
Id like to build a regulated psu board for this too. <<< Im offering
jleaman said:
I'll work on adding the component names tonight then I'll post the file. I already have a regulated PSU for this board...but I'm sure it could be made better with a little help, I'll post that too. You can see a photo of it in one of the previous posts in this thread. My supply uses LM317/337 regulators that can supply anywhere from 1.25 to 37V. Looking at my design it could probably use a little bit better decoupling, so I may make a few mods here and there. I'm using ISLR860P2 diodes which are a 2 pin TO220 case and are pin compatible with MUR860's.
As for the preamp board I may move the outputs toward the center of the board to shorten the traces.
So until tonight...heres a shot of the PSU 😀
Attachments
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jleaman said:
Great! I could use all the help I can get on this project, please post your design here when you are done with it. Also it would be nice if you could keep the board "parts friendly" by not using any really exotic parts with weird profiles that no other parts fit. When I put together the preamp board I used the standard resistors in the Eagle library, most 1/4 watt carbon film, or 1/2 watt metal film will fit the provided holes. Caps are a bit trickier, but it is possible to provide several sizes on the board. I only mention this because I was trying to fit some parts last night in an amplifier board, and nothing I had would fit neatly 😡 I suppose it would be nice to come to a consensus regarding which parts we want to use. I would like to see the following:
Vishay Dale 1/2 W metal film resistors 1%
Vishay MKT Poly Caps
Panasonic FC Electrolytics (50V)
I consider all of these parts pretty good value for the money, and not too expensive. I find the FC caps from Panasonic to be a great value! Also would anyone be interested if I converted this to a surface mount design. I would try to use parts no smaller than 1206 resistors. 😉 As for the OPAMPS I would stick to DIP as that is what I have handy...and those OPA637/627 are really expensive!
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Joined 2002
I agree. Im just about to get really mad i can't remember how to add a device or edit one in eagle or make one. I want to use the BUF634 but the t that you used in the schematic is surface mount and i dont want that : O ) So i have to change it i just cant remember how i do that.
Surface mount would be cool with me, just stick with the DIP chips, as I just ordered those. I suppose I could order more samples as surface mount, but I don;t want to be (too) greedy 🙂.
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Joined 2002
Great work so far Gcollier😎
Steen.
You might be better of with only one set of LM317/337's at about 21 volts and use a discrete regulator to take it down to around 15volts. Something like Alcaids zener/CCs regulator! I think the supply will be more quiet that way.
Steen.
steenoe said:
Steeno, that regulator board that I posted earlier used one set of regulators to provide voltage to the opamps, the second set is for the +/-2.5 V for the DS1802. I am certainly intrigued by the idea of using a discrete regulator for the second stage on the opamps. I wonder If I could adapt that to the newer PSU board that I have been working on. I attached a photo of it. The board to the left is the "lower section". This contains the rectifier and resevoir caps, while the board to the right is the "upper" board and contains only the regulators and necessary caps. The boards would attach together with mounting posts and screws through the four holes in the corners and possibly between the output caps as well. The three round pads just left of the resistors and regulators are used to feed the supply from the bottom layer to the top. You could use heavy guage wire for this, but I was thinking that machine screws or standoffs could also be used. This is actually only a single layer design, I was planning on using the top layer as a heatsink to cool the regulators...obviously with some conductive insulation between them.
Do you have a link to the discrete regulator...I'm lazy and don't feel like searching today
Also what makes the discrete regulator quiter, does a CC regulator have an advantage here? 😕Attachments
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Nice board's Id like to have a copy of these boards when they are made : O ) Ill continue to build a board ..
can you send me your eagle schematic PLZ.
j'
can you send me your eagle schematic PLZ.
j'
I didn't see that on the pic. Mayby I should have payed more attention on the thread?? Nonetheless, Voltage regulators are noisy! I have made a few supplies and the best way I tried is the regulators followed by a discrete one. Here is Alcaids regulator:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=49619&perpage=10&pagenumber=8
Here is Nuuk's LED regulator:http://www.decdun.fsnet.co.uk/gainclonepre.html#gcprepsu2
And this is how Nuuks look like in life:http://www.diyaudio.com/forums/showthread.php?s=&threadid=49619&perpage=10&pagenumber=7 Go to post 68 and 69. A discret regulator really filters out any supply noise🙂 🙂 I have also made discrete regulators on poweramps and headphone amps running ClassA, It really takes care of the noise😉 But ofcourse, you can try your PSU as it is, mayby it will work🙂 Just making suggestions for better sound😎
Steen.
BTW. If you want to implement Alcaids reg. just cut out the sch. from after the big 2200 caps and attach it to the end of your LM's after the snuppers 🙂
Not yet, Petter
I got swayed off by a Zen amp🙂 🙂 So the preamp has rested for a while, but I intend to catch up😀 The Zen sounds great😎 I am amazed🙂 Steen.
BTW If you want a peek, take a look here:http://www.diyaudio.com/forums/showthread.php?s=&threadid=52188&perpage=10&pagenumber=13
Go to post 124. You might even get tempted to join the Group buy😎 Sure guys, this is better than a chipamp
steenoe said:Not yet, Petter
Steen.
BTW If you want a peek, take a look here:http://www.diyaudio.com/forums/showthread.php?s=&threadid=52188&perpage=10&pagenumber=13
Go to post 124. You might even get tempted to join the Group buy😎 Sure guys, this is better than a chipamp
Yep, seen before that you like class-A and Nelson Pass' designs.
A chipamp is definetly not my last word in this hobby for sure.
Don't like the dissipation of class A designs though. That means lots of money for case/heatsinks. (Maybe when I'm no longer a student 😉 )
Keep me posted when you get the time to compare the vregs.
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