Jump to content

goldenreference low voltage power supply


kevin gilmore

Recommended Posts

If you can find a Fluke 187 or 189 or equivalent.

They range from $200 up to $400.  (yikes)

 

If you want a 6.5 digit benchtop model, an Agilent 34401A is about the best you can get for the princely sum of about $400 up.. (tee hee).

Don't look for the Agilent 3458A 8.5 digit multimeter.

  • Like 1
Link to comment
Share on other sites

  • 3 months later...
  • 2 weeks later...

I had mentioned using Schottky rectifiers for this. I think I am going to have a few of these made:

archive_top_small.png

These are setup to take either a D201 axial diode (31DQ10 or equivalent), or also accept a TO220 package like an MUR820. I know the TO220s should probably be oriented 90 degrees from how I have them for airflow, but my intent was the axial Schottky diodes on these.

I home-etched a pair of these and used them in my original Dynalo (headamp board). I used some Mill-Max right angle pins on those (3301-2-14-21-00-00-08-0), and plugged them right into the RS402 bridge holes on the PCB. If anyone with appropriate facilities wanted to compare these noise-wise to the packaged rectifiers, I could send them a pair to test.


3301-2-14-21-00-00-08-0.JPG

EDIT: Added John Swenson snubber across AC primary

Edited by Pars
Link to comment
Share on other sites

I think I might plagiarise that idea...

Just a thought, how big is the footprint for R1 and would it make sense to choose a bigger one? (I could be wrong, but it looks like 10mm to me and it also looks like there's space for 12.5mm :D )

 

//UFN

Link to comment
Share on other sites

I don't think you really need a high power resistor for this.

http://www.diyhifi.org/forums/viewtopic.php?f=15&t=1957#p41696

 

Quote

I used Jim's paper as a guide and tested every transformer I had, I came up with the values of 330ohms and .022uf, they worked well for everyone of them. So now I just use those values for everything. I use a carbon comp for the resistor and a polypropylene for the cap. Put them in series and put that network across each secondary. It can make a big difference.

 

I have a bunch of MKP1837 caps laying around. I'll have to measure them but used a 7.5 x 5.5 mm Wima outline, 5.08mm LS for it.

I usually just solder these on the bottom of the board, but figured since I was laying the board out anyway...

Edited by Pars
Link to comment
Share on other sites

  • 3 weeks later...
On 2016/1/18 at 7:57 PM, kevin gilmore said:

It does about 1.5 amps

there will be a higher voltage one soon that does 6 amps

Does  the goldenreference  low voltage provide enough juice for Dynahi? Use two for the Dynahi?  I plan to make the Dynahi for the use of HiFiman HE-6.

Link to comment
Share on other sites

Is possible add smd type soldering pad at GR LV's backside? smd tantalum capacitor looks are cheaper and easy to source.

maybe just my stupid idea. :(

On 2016/1/30 at 2:25 AM, Pars said:

I had mentioned using Schottky rectifiers for this. I think I am going to have a few of these made:

archive_top_small.png

These are setup to take either a D201 axial diode (31DQ10 or equivalent), or also accept a TO220 package like an MUR820. I know the TO220s should probably be oriented 90 degrees from how I have them for airflow, but my intent was the axial Schottky diodes on these.

I home-etched a pair of these and used them in my original Dynalo (headamp board). I used some Mill-Max right angle pins on those (3301-2-14-21-00-00-08-0), and plugged them right into the RS402 bridge holes on the PCB. If anyone with appropriate facilities wanted to compare these noise-wise to the packaged rectifiers, I could send them a pair to test.


3301-2-14-21-00-00-08-0.JPG

EDIT: Added John Swenson snubber across AC primary

Love this board!

Edited by palchiu
Link to comment
Share on other sites

Of course it is possible. I won't be doing it because I already ordered some, and couldn't get this version run because I had already submitted the version quoted. I could put it in and send you either the eagle files or the gerbers if you want.

 

Ooops, Seeeds gerber viewer doesn't appear to be working tonight so can't post a pic. Vertical mounted version, like the ones I home-etched for my Dynalo.

 

 

Link to comment
Share on other sites

21 hours ago, palchiu said:

Is possible add smd type soldering pad at GR LV's backside? smd tantalum capacitor looks are cheaper and easy to source.

maybe just my stupid idea. :(

Love this board!

Did you have a particular SMD cap package in mind? Let me know and I will add it.

 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.