Paradise Builders - Page 54 - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

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
Reply
 
Thread Tools Search this Thread
Old 16th December 2012, 08:54 PM   #531
hesener is offline hesener  Germany
diyAudio Member
 
Join Date: Mar 2005
Location: Munich, Germany
Quote:
Originally Posted by beetle View Post
At 21V both currents are 130mA.
24V: -138mA, +147mA
26V: -147mA, +161mA
28V: -151mA, +170mA
30V: -155mA, +178mA


Thanks for your help.
Still hard to believe the current should very so much with input voltage, for both rails.... mine were rock solid (once the CCS was operating) and were not changing (but I am quoting this from memory, would have to re-check)
  Reply With Quote
Old 16th December 2012, 08:56 PM   #532
beetle is offline beetle  Germany
diyAudio Member
 
Join Date: Mar 2008
BC337-40 as supplied with the group buy at both positions.
  Reply With Quote
Old 16th December 2012, 09:06 PM   #533
beetle is offline beetle  Germany
diyAudio Member
 
Join Date: Mar 2008
Do you know what... after friday it dosn't matter any more:

Click the image to open in full size.

  Reply With Quote
Old 16th December 2012, 09:12 PM   #534
FdW is offline FdW  Netherlands
diyAudio Member
 
FdW's Avatar
 
Join Date: Feb 2009
Location: Both feet on the ground (near Gouda)
Quote:
Originally Posted by beetle View Post
BC337-40 as supplied with the group buy at both positions.
In my power amp I have a pair (one + one - 15V) of these PSU's running from 70V (finished a pair yesterday). The CCS current does not vary with input voltage (any way, this is prohibited by the leading CVS).

Mounting the wrong transistor (as Hessener noted) may make the reverse Vbe work as a zener and the CCS and CVS may conduct (this could also happen if the power transistors where wrongly mounted (I guess)).

But it is all a bit unlikely to lead to a functioning PSU.

I still cannot explain the hugely variant Vbe’s , I keep on watching.
  Reply With Quote
Old 16th December 2012, 09:14 PM   #535
FdW is offline FdW  Netherlands
diyAudio Member
 
FdW's Avatar
 
Join Date: Feb 2009
Location: Both feet on the ground (near Gouda)
Quote:
Originally Posted by beetle View Post
Do you know what... after friday it dosn't matter any more:

Click the image to open in full size.

But it would be nice (for you) to enter Paradise before that time and I am willing to help you escape disaster by doing so (enter Paradise before that time).
  Reply With Quote
Old 16th December 2012, 09:18 PM   #536
hesener is offline hesener  Germany
diyAudio Member
 
Join Date: Mar 2005
Location: Munich, Germany
Quote:
Originally Posted by FdW View Post
In my power amp I have a pair (one + one - 15V) of these PSU's running from 70V (finished a pair yesterday). The CCS current does not vary with input voltage (any way, this is prohibited by the leading CVS).

Mounting the wrong transistor (as Hessener noted) may make the reverse Vbe work as a zener and the CCS and CVS may conduct (this could also happen if the power transistors where wrongly mounted (I guess)).

But it is all a bit unlikely to lead to a functioning PSU.

I still cannot explain the hugely variant Vbe’s , I keep on watching.
Frans, I was wondering if the transistors were somehow acting as a thyristor, triggering each other off... do you think that could be a possibility? Never heard of it though. And it might be due to very high (current) gain in the setup.....
  Reply With Quote
Old 16th December 2012, 09:20 PM   #537
hesener is offline hesener  Germany
diyAudio Member
 
Join Date: Mar 2005
Location: Munich, Germany
Quote:
Originally Posted by FdW View Post
But it would be nice (for you) to enter Paradise before that time and I am willing to help you escape disaster by doing so (enter Paradise before that time).
Subscribed to an alternative music magazine, and they had a review of the important events for the year 2012. And for dec 21, 2012, the note says: "The end of the world as we know it causes a lot of discomfort"

  Reply With Quote
Old 16th December 2012, 09:28 PM   #538
FdW is offline FdW  Netherlands
diyAudio Member
 
FdW's Avatar
 
Join Date: Feb 2009
Location: Both feet on the ground (near Gouda)
Quote:
Originally Posted by hesener View Post
Frans, I was wondering if the transistors were somehow acting as a thyristor, triggering each other off... do you think that could be a possibility? Never heard of it though. And it might be due to very high (current) gain in the setup.....
May be (but unlikely). The numbers (measurements) are very unreal, and I cannot understand them. The gain of the power transistors can be diminished (lowered in importance) by lowering the resistors R100 and R103 (they could be lowered to 22 Ohms).

But as I do not understand what is happening, I am a bit afraid to advice a thing like that (it could be that doing experiments like this does more harm than good).
  Reply With Quote
Old 16th December 2012, 09:31 PM   #539
FdW is offline FdW  Netherlands
diyAudio Member
 
FdW's Avatar
 
Join Date: Feb 2009
Location: Both feet on the ground (near Gouda)
Quote:
Originally Posted by hesener View Post
Subscribed to an alternative music magazine, and they had a review of the important events for the year 2012. And for dec 21, 2012, the note says: "The end of the world as we know it causes a lot of discomfort"

That's true

As I see it "The world as I know it ends every moment and a new one starts at the same moment".

Or, the multiverse is here today, was here yesterday, and will be here tomorow (and the day before and after).
  Reply With Quote
Old 16th December 2012, 11:15 PM   #540
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
The Sun Ain't Gonna Shine (Anymore) - Walker Brothers - YouTube
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Paradise phono stage hesener Group Buys 1315 11th August 2014 10:37 PM
DIY Paradise - Any good to buy from? gingerpimp0069 Vendor's Bazaar 7 21st June 2007 02:07 PM
DIY Paradise Charlize Jolojl Swap Meet 7 7th December 2006 06:42 AM
Diy Paradise! alexmoose Tubes / Valves 3 24th July 2006 04:37 AM
Another way to paradise ? Bernhard Pass Labs 3 8th August 2003 10:19 PM


New To Site? Need Help?

All times are GMT. The time now is 05:36 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2