Audio Research SP9 Circuit Diagram HELP! - Page 3 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 2nd March 2008, 03:07 PM   #21
caliban is offline caliban  United States
diyAudio Member
 
Join Date: Feb 2008
Yes, I did. I will try sending one page at a time to see if that works, stand by.
  Reply With Quote
Old 2nd March 2008, 03:31 PM   #22
caliban is offline caliban  United States
diyAudio Member
 
Join Date: Feb 2008
http://s53.photobucket.com/albums/g73/porporpor/

V -- I uploaded the schematics to PhotoBucket, they are slightly smaller due to the website constraints, but I think they will be large enough. Click on the image for a full size view.

This has to work. I have no idea why the email has not.
  Reply With Quote
Old 2nd March 2008, 04:31 PM   #23
Valde is offline Valde  Denmark
diyAudio Member
 
Join Date: Nov 2007
Location: Nordjylland
Quote:
Originally posted by caliban
http://s53.photobucket.com/albums/g73/porporpor/

V -- I uploaded the schematics to PhotoBucket, they are slightly smaller due to the website constraints, but I think they will be large enough. Click on the image for a full size view.

This has to work. I have no idea why the email has not.

Thanks again for your effort, Caliban! I got it know

Valde
  Reply With Quote
Old 4th March 2008, 08:03 AM   #24
Luke is offline Luke  New Zealand
diyAudio Member
 
Join Date: Sep 2001
Location: Wellington NZ
Send a message via AIM to Luke
Hi Brett,

Ive thought about building allen wrights pre, need to buy the book first dont you? Ive read a few good things about his rtp3c.
It seems wrong to use transformers in a preamp, surely you can do as well if not better without this added expense?
  Reply With Quote
Old 4th March 2008, 10:06 AM   #25
diyAudio Member
 
Brett's Avatar
 
Join Date: Jan 2002
Quote:
Hi Brett,

Ive thought about building allen wrights pre, need to buy the book first dont you? Ive read a few good things about his rtp3c.
Nope, I've bought it but built from the schematic.
Quote:
It seems wrong to use transformers in a preamp, surely you can do as well if not better without this added expense?
Wrong, why? They work well, sound better than caps and give galanic isolation. Sure they can be a bit exxy, but so can caps and the RTP3 linestage is a difficult and potentially expensive build with 5 envelopes/channel. I preferred a similar line stage to what I suggested above to the RTP. Allen will no doubt disagree, but I've built both.
  Reply With Quote
Old 12th July 2012, 01:26 PM   #26
diyAudio Member
 
Join Date: Jul 2004
Location: dresden
Trying not to drag up such an old thread but I was looking in the schematics, specifically in the power-supply section in regards to voltage change.

Is there dual taps for both 50 and 60Hz voltage frequencies? What about going from a 110volt country to a 220volt. I have my SP-9 maybe being sent here to me here in Germany from Canada and wonder if this will work, or a step down transformer may.

thx
Shamus
  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
Audio Research LS15 circuit and description analog_sa Tubes / Valves 1 13th May 2009 01:28 AM
Cambridge Audio IsoMagic & DisMagic problem - circuit diagram? jdunham Digital Source 51 24th December 2007 02:00 AM
Cambridge Audio CD5 output stage (circuit diagram) 316a Digital Source 0 15th May 2007 04:57 PM


New To Site? Need Help?

All times are GMT. The time now is 10:22 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