Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

jl hood 75w amp(1972)
jl hood 75w amp(1972)
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
Thread Tools Search this Thread
Old 4th September 2007, 04:46 PM   #1
p robertson is offline p robertson
diyAudio Member
Join Date: Jul 2002
Location: london uk
Default jl hood 75w amp(1972)

Having built jlh hood's 30w int amp (cir1980) would be intersted to hear if anyone has built his ealier 75w amp pub in hifi news 1972.Thanks.ps the input stage appears to be unbalanced?
  Reply With Quote
Old 4th September 2007, 05:51 PM   #2
Geoff is offline Geoff  United Kingdom
diyAudio Member
Join Date: Apr 2001
Location: UK
For anyone interested, the schematic of both amps can be found here:

  Reply With Quote
Old 4th September 2007, 06:24 PM   #3
latala is offline latala  United Kingdom
diyAudio Member
Join Date: Feb 2006
Location: staffordshire
jl hood 75w amp(1972)
I have built thr 75 watter it was good very good! I used the Powertran kit that was considered to be the Rolls Royce version .
I do in fact still have one about the house and have built many clones of it.
I still agree with a lot of the design criteria and feel that a design such as this with Baxendall diode compensation etc as valid also the fact that the VAS stage was isolated from the diff pair via a current booster helped to improve distortion figures below a then magical 0.01% mid band
As to the thirty watt amplifier this is very similar to a design that I have made many hundreds of times the themal stabilty of the output stage is superb
regards Trev
  Reply With Quote


jl hood 75w amp(1972)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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
RCA 1972 Basic amplifier MODS ostripper Solid State 143 2nd October 2016 02:48 PM
1972 Luxman Sq-202 Schematic GJW Solid State 4 15th August 2006 09:44 PM
National LM 1972 Herman Solid State 12 10th September 2001 08:18 AM

New To Site? Need Help?

All times are GMT. The time now is 05:53 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio