Valve Itch phono - Page 122 - 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 13th August 2013, 03:14 PM   #1211
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Peaks can be softened with a RC snubber?
  Reply With Quote
Old 13th August 2013, 03:17 PM   #1212
stajo is offline stajo  Sweden
diyAudio Member
 
Join Date: Jun 2011
Location: Stockholm
My guess is that the filter is designed for being good enough for a later regulator, so buld it like it is and then add filltering if you think you need it.
  Reply With Quote
Old 13th August 2013, 03:22 PM   #1213
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
But you "read" the bridge current and the Tx voltage. The charge cycle is what you see. Your final ripple will be shown when reading at C2.
  Reply With Quote
Old 13th August 2013, 03:43 PM   #1214
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
I only added a filter above 53kHz with 1 ohm 1W & 3uF to remove HF
Attached Images
File Type: png Itch PSU LL1683.png (200.2 KB, 89 views)
  Reply With Quote
Old 13th August 2013, 03:52 PM   #1215
stajo is offline stajo  Sweden
diyAudio Member
 
Join Date: Jun 2011
Location: Stockholm
31,6 mV ripple
Attached Images
File Type: png psudVIPh.png (101.6 KB, 67 views)
  Reply With Quote
Old 13th August 2013, 04:05 PM   #1216
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
I'm not worried about ripple because I use SSHV2. As Bass translated to English by DHTRob "designing a PSU with DucanAmps PSUDII" I'm looking for an optimal Q-factor (damping), this mean that the supply is capable of restoring in a clean way the lost energy very quickly.
  Reply With Quote
Old 13th August 2013, 04:31 PM   #1217
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Hey guys I need to understand how to use "for miliseconds" and "delay in seconds"? I ask because everyone use a different scale....
  Reply With Quote
Old 13th August 2013, 04:50 PM   #1218
stajo is offline stajo  Sweden
diyAudio Member
 
Join Date: Jun 2011
Location: Stockholm
Well, I dont see any of those ringings. But that has to do with your secondarys dcr and it will be lower the bigger transformer you have. I guess you have a toroid because they have the lower dcr. What you could do if you think you have a problem is add resistors to your secondarys or lower first cap, to trade from ripple.

If you measure without delay you get the whole startup phase and then you dont have the average behaviour under normal run. Therefore add delay until startup phase is over.

If you want to look at startup phase, then no delay ofc.

Measuring time (for milliseconds) is just like x-axis on a scope. Set it so you see the waves properly.
Attached Images
File Type: png psudVIPh2.png (87.7 KB, 63 views)

Last edited by stajo; 13th August 2013 at 04:52 PM.
  Reply With Quote
Old 13th August 2013, 04:54 PM   #1219
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Salas what's the max. ripple allowable for SSHV2?
  Reply With Quote
Old 13th August 2013, 04:58 PM   #1220
diyAudio Member
 
merlin el mago's Avatar
 
Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
Originally Posted by stajo View Post
Well, I dont see any of those ringings. But that has to do with your secondarys dcr and it will be lower the bigger transformer you have. I guess you have a toroid because they have the lower dcr. What you could do if you think you have a problem is add resistors to your secondarys or lower first cap, to trade from ripple.

If you measure without delay you get the whole startup phase and then you dont have the average behaviour under normal run. Therefore add delay until startup phase is over.

If you want to look at startup phase, then no delay ofc.

Measuring time (for milliseconds) is just like x-axis on a scope. Set it so you see the waves properly.
Thanks for help stajo, I discovered that if I don't put aby delay in sec, the result don't display how much ripple in numbers.
  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
Got the build itch again. 80w kt88 itsmejto Tubes / Valves 44 26th September 2008 11:49 PM
valve phono stage wanted for mc brobarrie Swap Meet 1 13th August 2007 08:17 PM
Basic DIY Valve Phono Stage matthew2456 Tubes / Valves 5 29th March 2007 04:11 AM
Phono pre, valve or jfet lndm Analogue Source 7 4th April 2006 02:11 PM
phono preamp design for c3m postie valve fergs1 Tubes / Valves 1 29th May 2005 02:12 PM


New To Site? Need Help?

All times are GMT. The time now is 12:40 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