BOZ preamp project - Page 6 - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

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
Reply
 
Thread Tools Search this Thread
Old 24th October 2006, 01:42 AM   #51
diyAudio Member
 
Join Date: Sep 2006
After removing the resistors, I got voltage at C1 is around 80V, emitter of Q1 is around 60V, BUT, after about 10mins, the C2 is exploded. Definitely there is some shorting somewhere.

So I decided to redo it from begining which I will test as I go, and very careful about the short circuit. :-(

@Dzoli: Did you get the same problem as mine before you change to 22K?
  Reply With Quote
Old 24th October 2006, 07:43 AM   #52
dzoli is offline dzoli  Hungary
diyAudio Member
 
Join Date: Aug 2005
Quote:
After removing the resistors, I got voltage at C1 is around 80V, emitter of Q1 is around 60V, BUT, after about 10mins, the C2 is exploded. Definitely there is some shorting somewhere. So I decided to redo it from begining which I will test as I go, and very careful about the short circuit. :-(
Hello,

No, I relised that the current drawn form the the power supply was high on on channel. I had the possibility to compare the voltages between the two channels. Then I found the faulty 10K trimmer.

Regards,

Zoltan
  Reply With Quote
Old 24th October 2006, 07:49 AM   #53
diyAudio Member
 
bays_9a5tt's Avatar
 
Join Date: Jan 2005
Location: Zagreb
Quote:
after about 10mins, the C2 is exploded.
Hmm, electrolytic caps explode if they build excessive inner pressure. This may indicate reversed polarity on C2, faulty C2 or so...
I would replace C2 with new one, 100uF/100V.
After that, check voltages as previously mentioned. When you're sure about the supply, solder back R2/R3 and check. You might expect voltages similar to this
thread
  Reply With Quote
Old 31st December 2006, 11:11 AM   #54
diyAudio Member
 
JC Fardo's Avatar
 
Join Date: Jun 2002
Location: Sao Paulo - Brazil
Default Fun with Blackies

Quote:
Originally posted by likeDIY
Hi guys, the output capacitor C103 =10uF can be changed by 22uF? Will the output frequency response changes alot?
Hi

Just for the record. Yesterday I replaced originals coupling 1.0 and 10,0 uF Panasonics to Black-Gate N 50V 1.0 and 4.7uF.
Well it really works. Improved highs and sound stage.
Recommended.
Happy New Years
__________________
JC
  Reply With Quote
Old 31st December 2006, 01:04 PM   #55
Ryssen is offline Ryssen  Sweden
diyAudio Member
 
Ryssen's Avatar
 
Join Date: Dec 2003
Location: Sweden--> Here
Quote:
Yesterday I replaced originals coupling 1.0 and 10,0 uF Panasonics to Black-Gate N 50V 1.0 and 4.7uF.
Those BG are e-lyts right?Still they sounded better than the Panasonics?
__________________
Regards Åke
  Reply With Quote
Old 31st December 2006, 03:35 PM   #56
diyAudio Member
 
JC Fardo's Avatar
 
Join Date: Jun 2002
Location: Sao Paulo - Brazil
Correct. They sounded better.
They are non-polar elitcs and this confirm its good reputation
__________________
JC
  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
..my little ecc82 preamp-project Mr. Triatic Tubes / Valves 25 8th April 2012 09:47 PM
The diyAudio.com preamp project! dorkus Solid State 291 16th September 2011 02:15 PM
Project Phono SE preamp Sunsun22 Analogue Source 10 17th December 2004 02:53 AM


New To Site? Need Help?

All times are GMT. The time now is 03:47 AM.


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