DSelf Precision Preamp - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 4th November 2001, 07:31 PM   #1
diyAudio Member
 
Join Date: Apr 2001
Location: UK
I love this forum...

Enough of the sentiments, I have recently built Douglas Self's Precision Preamp II. Currently, I have not been able to get it to a working state, the fuses keep blowing, I have followed the wiring directions in the instructions regarding one of the regulators. There are a few things that I need to pursue but, how does it sound. I'm hoping it's better than my integrated (an elderly audiolab 8000A), I just wondered if anyone has actually made this preamp.

Your expertise would be reaaaaally helpful.

Brownlow
  Reply With Quote
Old 4th November 2001, 08:12 PM   #2
diyAudio Member
 
Join Date: Sep 2001
Location: Fairbanks, Alaska
Can you tell me were I can find the diagram? Just guessing that if you have a fuse that blows, and if it uses a negative voltage regulator IC, I would check the wiring to the negative regulator. The negative regulators have reversed pins.

Just a possibility. Ignore if it does not use these.

But blowing fuses would seem to indicate improper power supply wiring. Improper circuit wiring would likely result is smoke unless there is a dead short.

John Fassotte
  Reply With Quote
Old 7th November 2001, 07:08 AM   #3
diyAudio Member
 
Join Date: Apr 2001
Location: UK
John

Thanks for the reply, it's funny how you say to yourself that every component is in its right place. You gave me an idea and I spotted two diodes reversed. Eye fatigue can be a real problem. Again, I appreciate the suggestion, the fuses have stopped blowing.


Brownlow
  Reply With Quote
Old 7th November 2001, 07:25 AM   #4
hifiZen is offline hifiZen  Canada
diyAudio Member
 
hifiZen's Avatar
 
Join Date: May 2001
Location: Mountain View, CA
hmm... rectifier diodes in wrong... reminds me of the time i did exactly the same thing. Even after i checked them twice, i was convinced i had them in the right way around. Heh, it took another check of the schematic (and two more fuses!) to discover my blunder. Oh well.. happens to us all! let us know how it sounds..
__________________
- Chad.
  Reply With Quote
Old 23rd January 2002, 05:56 PM   #5
diyAudio Member
 
Join Date: Jan 2002
Location: United Kingdom
Default Precision Preamp

Hi

Just to let you know, I have been using this preamp since early 1997, I built it when it was first published on the PCB, ordered from Douglas Self.

It is a brillant preamp, and has never gone wrong, and worked first time!

There are pics of the preamp on my site. http://blackwidowaudio.com/ and i may be able to help with the diagrams as well...

Hope this is of interest

  Reply With Quote
Old 18th June 2011, 03:46 PM   #6
diyAudio Member
 
Join Date: Jun 2011
Is there any good chassis-case to accomodate the Douglas Self's PRECISION PREAMPLIFIER 2.0
  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
Precision devices...... Village Plank Multi-Way 10 14th December 2008 07:49 PM
precision fidelity chevy_lvu Solid State 0 26th March 2008 07:42 AM
Maxim AN1931: USB-Powered High Precision Phono Preamp lineup Analogue Source 0 17th December 2006 08:52 AM
Precision resistors carlmart Chip Amps 27 3rd March 2006 09:25 PM
DSelf Precision Preamp Balance Control John10 Solid State 4 10th February 2004 04:07 PM


New To Site? Need Help?

All times are GMT. The time now is 12:34 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