1590E Power Amplifier - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

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 25th July 2013, 07:01 PM   #1
KJ5555 is offline KJ5555  United States
diyAudio Member
 
Join Date: Jul 2013
Default 1590E Power Amplifier

Trying to build this but when I model it on Multisim, dozens of resistors are burning up. The only thing I can think of is that the step-up transformer at the output is causing it. Almost all the resistors near the transformer is burning up and a few in the middle of the circuit are too.

I have measured the resistance of the terminals of the transformer and there is very little resistance. I am pretty sure I have got the right turns ratio.

Does anyone have an idea as to why all these resistors may be burning up in my model?

As a reference:

http://alteclansingunofficial.nlenet...90E-Manual.pdf
  Reply With Quote
Old 5th August 2013, 11:20 PM   #2
diyAudio Member
 
Join Date: Aug 2013
I still have 4 from the old cleveland stadium. They are monsters. Make sure you are strapping the output trans correctly. Not sure how that works in a modeling program. I have the original schematics and parts list if you want it. The only problem I have ever had with these (in real life) is the volume pot going bad and serious clipping distortion til they were replaced.
  Reply With Quote
Old 6th August 2013, 01:40 AM   #3
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Build it?

Or build a model of it?

Not sure what the purpose might be?

You can substitute a pair of resistors (assuming a grounded CT on the primary, didn't look) for the transformer at the output.

Perhaps your feedback loop is causing it to be an oscillator?

_-_-
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 12th August 2013, 08:01 PM   #4
KJ5555 is offline KJ5555  United States
diyAudio Member
 
Join Date: Jul 2013
I managed to stop blowing up the resistors, thank you!
  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
Altec Lansing Solid State Amps 1590B, 1590E, 771B, 771BX and "SYSTEM CABINET" tiefbassuebertr Solid State 10 25th November 2013 08:24 AM
alteration of the power supply from the power amplifier Harman Kardon HK870 at 220. alexkmp3 Power Supplies 4 11th December 2012 04:39 PM
An amplifier to take to University - A small low power integrated amplifier monty78pig Solid State 33 31st August 2012 06:00 AM
altec 1590E input questions brianshep Solid State 22 20th March 2012 03:41 PM
Amplifier 3000 Wats Rms Power + Smps Higcht Power Bestiality MARAVILLASAUDIO Class D 1 5th November 2004 04:06 PM


New To Site? Need Help?

All times are GMT. The time now is 01:30 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