pre-amp schematic - 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 22nd May 2003, 08:05 PM   #1
diyAudio Member
 
Join Date: Jan 2002
Default pre-amp schematic

Here is an attached schematic of my pre-amp I am building.

The supply will be run of 3 12V batteries.

Was going to use BG for the 100uf supply cap, but with the issue of discharge in these caps... probably not.

So... looking for ideas to use for this cap...?

Use Riken for the resistors.

Ideas for output coupling cap???

Does the BG Cancelling pair using NP have the same discharging effect as the others?

Any recommendations on the pre? Gain is around 6.
Attached Images
File Type: jpg image.jpg (46.5 KB, 562 views)
  Reply With Quote
Old 22nd May 2003, 08:16 PM   #2
diyAudio Moderator Emeritus
 
jean-paul's Avatar
 
Join Date: Sep 2002
Location: Germany
Quote:
Was going to use BG for the 100uf supply cap, but with the issue of discharge in these caps... probably not.
What issue do you mean ?
__________________
It's only audio. Official member of the Norske Brillegeit Gang.
  Reply With Quote
Old 22nd May 2003, 08:19 PM   #3
diyAudio Member
 
Join Date: Jan 2002
Default issue

The issue is with that BG caps need a very long break in period, and if you turn the pre-amp off, next time you tuen it on, needs several hours for best sound.

With battery supplies.... keeping them on for more than a couple of hours is difficult.

BG caps sound the best when the equipment they are in is left on all the time...

so I have I been said....
  Reply With Quote
Old 22nd May 2003, 09:05 PM   #4
lohk is offline lohk  Europe
diyAudio Member
 
lohk's Avatar
 
Join Date: Apr 2001
Location: Northern Noricum, near the Limes
This circuit is almost similar to the TNT Preamble. They use 10k for your R6 instead of 1k and 40V supply voltage.
The output cap should have a higher value, at least 8 - 10yF.

Klaus
  Reply With Quote
Old 22nd May 2003, 10:58 PM   #5
diyAudio Moderator Emeritus
 
jean-paul's Avatar
 
Join Date: Sep 2002
Location: Germany
Default Re: issue

Quote:
Originally posted by RichardJones
The issue is with that BG caps need a very long break in period, and if you turn the pre-amp off, next time you tuen it on, needs several hours for best sound.

With battery supplies.... keeping them on for more than a couple of hours is difficult.

BG caps sound the best when the equipment they are in is left on all the time...

so I have I been said....

Apart from the break-in period this is nonsense. Don't believe everything people say, better try it yourself.

The break-in period can be shortened by putting the caps on a power supply for some weeks.
__________________
It's only audio. Official member of the Norske Brillegeit Gang.
  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
looking for a pre-amp schematic steamPunk Tubes / Valves 3 3rd August 2008 01:49 PM
DBX 500 schematic d3imlay Solid State 0 2nd August 2008 05:12 PM
F3 schematic kenev Pass Labs 2 24th January 2008 03:24 PM
Need Six-pac amp schematic Sarge Tubes / Valves 1 31st July 2004 08:30 PM


New To Site? Need Help?

All times are GMT. The time now is 02:38 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