default mods to 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 3rd July 2007, 01:32 PM   #1
gy21 is offline gy21  Netherlands
diyAudio Member
 
Join Date: Mar 2006
Location: Drachten
Send a message via MSN to gy21
Question default mods to preamp?

are there any default mods that can be done to a preamp? I have a nad 1300 and I would like to upgrade it a bit, better opamps etc etc.

Does anyone have some tips?
__________________
Hifi Setup: http://my.hifi.nl/?user=1651
Music Collection: http://www.hilbimuziekcollectie.tk
  Reply With Quote
Old 3rd July 2007, 04:21 PM   #2
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
First thing to look at is the power supply and all the caps used in the preamp.
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com
  Reply With Quote
Old 4th July 2007, 09:47 AM   #3
gy21 is offline gy21  Netherlands
diyAudio Member
 
Join Date: Mar 2006
Location: Drachten
Send a message via MSN to gy21
here is the schematic for the nad1300, can anyone point me out some areas and maybe how to improve them

nad1300schematic

I replaced the opamps ic207 and ic208 (jrc2043) with ad823 opamps wich i had from this thread replacing NAD 1300 volume/Balance pot .

the ad823 are know for a bit agressive highs, wich i liked in the nad1300, beacause of my current a bit darker sounding speakers.

i wil also try out ad8620 in this area.
__________________
Hifi Setup: http://my.hifi.nl/?user=1651
Music Collection: http://www.hilbimuziekcollectie.tk
  Reply With Quote
Old 4th July 2007, 02:14 PM   #4
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Hotlinking not permitted ???
Can you download and post the schematic here ?
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com
  Reply With Quote
Old 4th July 2007, 02:30 PM   #5
gy21 is offline gy21  Netherlands
diyAudio Member
 
Join Date: Mar 2006
Location: Drachten
Send a message via MSN to gy21
Nad1300 schematic

i'm sorry, this is the correct link.
__________________
Hifi Setup: http://my.hifi.nl/?user=1651
Music Collection: http://www.hilbimuziekcollectie.tk
  Reply With Quote
Old 4th July 2007, 02:42 PM   #6
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Thanks for sorting the link.
I begin to wonder what comes out after passing through all that circuitry and switches? Is it still music?
__________________
regards Andrew T.
  Reply With Quote
Old 4th July 2007, 03:09 PM   #7
gy21 is offline gy21  Netherlands
diyAudio Member
 
Join Date: Mar 2006
Location: Drachten
Send a message via MSN to gy21
it is still music, i use the switches to bypass everything that is possible, so no tone control and infra circuit is also bypassed.
__________________
Hifi Setup: http://my.hifi.nl/?user=1651
Music Collection: http://www.hilbimuziekcollectie.tk
  Reply With Quote
Old 4th July 2007, 03:33 PM   #8
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
That then begs the question:-
what discrete opamps and IC opamps are still in use?
__________________
regards Andrew T.
  Reply With Quote
Old 5th July 2007, 07:30 AM   #9
gy21 is offline gy21  Netherlands
diyAudio Member
 
Join Date: Mar 2006
Location: Drachten
Send a message via MSN to gy21
i agree, that's what I would like to know as well.

I would like to cleanup the signal path, but I'm not sure howto.
__________________
Hifi Setup: http://my.hifi.nl/?user=1651
Music Collection: http://www.hilbimuziekcollectie.tk
  Reply With Quote
Old 7th July 2007, 09:43 AM   #10
gy21 is offline gy21  Netherlands
diyAudio Member
 
Join Date: Mar 2006
Location: Drachten
Send a message via MSN to gy21
my guess is that only ic201 and ic 207 and ic208 are in use if you activate all the bypass switches.
__________________
Hifi Setup: http://my.hifi.nl/?user=1651
Music Collection: http://www.hilbimuziekcollectie.tk
  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
Mission 776 preamp mods tkwou Solid State 23 27th September 2012 05:14 PM
Curcio Daniel Preamp Mods? danFrank Tubes / Valves 6 22nd April 2007 02:53 PM
Email Notification default Pano Class D 2 24th November 2005 01:07 AM
Hafler DH 101 preamp mods Zen Mod Solid State 6 3rd May 2004 01:24 AM
Use 'Email Notification' by default? georgehifi Forum Problems 1 5th October 2003 01:48 AM


New To Site? Need Help?

All times are GMT. The time now is 02:26 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