Building a symmetrical psu B1 buffer - Page 240 - diyAudio
 Building a symmetrical psu B1 buffer
 User Name Stay logged in? Password
 Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read Search

 Pass Labs This forum is dedicated to Pass Labs discussion.

 Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
 5th February 2012, 03:05 PM #2391 diyAudio Member     Join Date: Nov 2011 Location: UK The only problem that I am having with the Toner Transfer method is that I have whiskers between tracks that I have to get rid of. The photo etch process, IMHO, is far more accurate.
diyAudio Chief Moderator

Join Date: Oct 2002
Location: Athens-Greece
Quote:
 Originally Posted by KatieandDad Looking at POST 138 you are using traffic lights to acurately produce the reference voltages - Am I right in this assumption ?
You mean the pictures of the black original boards in post 138 I guess. Yes some combine colors. Try 9.4V total, the old ones had an additional drop of a 10R that boosted the 9V a bit. No sinks low Id build that one. Easy to squeeze in crowded box.
Attached Images
 MezGru.jpg (169.2 KB, 332 views)

diyAudio Chief Moderator

Join Date: Oct 2002
Location: Athens-Greece
Quote:
 Originally Posted by KatieandDad I've been busy measuring my collection of LEDs - well the 3mm RED and GREEN ones. I reckon that the best match that I can get for 9V and 5V4 is as follows. 9V = RED RED RED GREEN GREEN. (1.61+1.62+1.61+2.08+2.08 = 9V0) 5V4 = RED RED GREEN. (1.63+1.63+2.11 = 5V37) I can then match both strings to within 10mV of each other and the target voltage. Is that sufficiently accurate ?
How did you measure those? This is the best method to measure near real circuit operating conditions:
Attached Images
 MeasLED.gif (20.6 KB, 322 views)

 6th February 2012, 08:11 PM #2394 diyAudio Member   Join Date: Oct 2009 Hey there, I am just starting to source components and wanted to double check the transformer selection before proceeding. Is an Antek AN-0515 appropriate? Specs read 15V and 50VA, but I can't tell if it is 15+0+15 or not (or if I should be using a different product altogether). Link is here . Or does anyone know of a more logical transformer choice (lower the price, the better; for someone in USA).
 6th February 2012, 08:14 PM #2395 diyAudio Member   Join Date: Nov 2009 Location: Near Lincoln The link says two outputs so it should be 0-15;0-15. You would just need to common the two centre wires to make 15-0-15 to connect to the pcb. 50VA is fine if you want to go down the hotrod line.
diyAudio Member

Join Date: Oct 2009
Quote:
 Originally Posted by Marra The link says two outputs so it should be 0-15;0-15. You would just need to common the two centre wires to make 15-0-15 to connect to the pcb.
Great, thanks Marra!

diyAudio Member

Join Date: Nov 2011
Location: UK
Quote:
 Originally Posted by Salas How did you measure those? This is the best method to measure near real circuit operating conditions:
I used a 5V regulated supply and a series 330R resistor to simulate a 10mA current.

I thought that would be accurate enough.

I've just sourced a pair of 0-15 0-15 50VA toroids. I only need one so I've put the other on Swap-Meet.

 7th February 2012, 04:20 PM #2398 diyAudio Member     Join Date: Oct 2010 Location: Burlington, NC Any benefir to using v rated parts in dcb1?
diyAudio Member

Join Date: Nov 2011
Location: UK
Quote:
 Originally Posted by buzzforb Any benefir to using v rated parts in dcb1?
I've heard of V rated tyres for cars but never V rated components ???

diyAudio Chief Moderator

Join Date: Oct 2002
Location: Athens-Greece
Quote:
 Originally Posted by KatieandDad I used a 5V regulated supply and a series 330R resistor to simulate a 10mA current. I thought that would be accurate enough.
Not far.

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are Off Pingbacks are Off Refbacks are Off Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Babowana Pass Labs 328 20th February 2010 02:14 AM

 New To Site? Need Help?

All times are GMT. The time now is 03:54 AM.