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 29th January 2008, 02:59 PM   #1
wleediy is offline wleediy  Singapore
diyAudio Member
 
Join Date: May 2004
Location: Singapore
Default Sheldon Stokes MOS FET amp as power amp

With the op amp getting better sound, I wish to build a samll and easy power amp with it.
I would to build the simplest first, op amp driving a pair of Mos fet or BJT devices.

Mos Fet will be more sensitive to drive, this will be similar to Sheldon stokes head phone amp, with +/- 15 v power supply, and bigger closed loop gain of 30 or 40, such that I could drive it with CD player easily. I am not sure how much power I can get from here. Assuming +/- 10 Volts output swing, the output for 8 ohm speaker will be 100/8 = 12.5 watts. Is this assumption correct? I have some IRF 9530, and 531. Though th erateing of 531 is slihtly lower, I assume it will be ok for 15V dual power supply.
If I use BJT, I would build it in stages, first with just a pair of emitter followers, such as MJE 15034/15035. With op amp that is capable of more then 50 ma output drive, and beta of 100, we could have an output of 5 Ampere, sufficient to produce 12 watts output. If it does not work, perhaps I will add BC 550/560 to drive the MJE 15034/35.

Any advise on this please?

Tks and rgds

William Lee
  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
40A 250V Schottky Power Diodes- Has anyone use in Power Amp to replace Diode Bridge? dtm1962 Solid State 10 15th September 2011 07:38 PM
Amplifier 3000 Wats Rms Power + Smps Higcht Power Bestiality MARAVILLASAUDIO Class D 1 5th November 2004 04:06 PM
TubeDAC from Sheldon Stokes with PCM63 stef1777 Digital Source 9 23rd July 2004 09:16 AM
power output calculations, rated power and required power output metebalci Tubes / Valves 7 22nd February 2004 05:49 PM
Hey look, it's Sheldon Stokes jwb Everything Else 4 8th December 2002 06:42 PM


New To Site? Need Help?

All times are GMT. The time now is 03:07 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