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

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

100watt mono blocks
100watt mono blocks
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 26th August 2006, 10:11 PM   #1
yise1 is offline yise1  United States
diyAudio Member
Join Date: Jul 2006
Default 100watt mono blocks

Hi guys I'm interested in building a set of 100watt mono block tube amps. From reading some of the posts and looking at other peoples amps, I realize that this is a pretty big undertaking especially for me as this will be my first diy project. With that being said all prayers and any help are welcome. Does anyone know if there are any schematics available or projects that are similar that I could glean some info from?
  Reply With Quote
Old 27th August 2006, 02:10 AM   #2
ray_moth is offline ray_moth  Indonesia
diyAudio Moderator Emeritus
ray_moth's Avatar
Join Date: Jan 2004
Location: Jakarta
100 W monobloc is by no means out of the question. Just don't try to do it with one pair of PP tubes - parallel PP is a far better idea. KT88s or 6550s in PPP class AB1 UL mode should be capable of providing 100 W or more of clean power.

The biggest factors for success are going to be the output transformer and the power supply. The PS needs to be well capable of providing the required current without much sag. You'll need seriously big and heavy trannies, together with the chokes you'll probably want to use, and the total weight of the hardware is a good reason why you're wise to consider monoblocs, IMHO.
  Reply With Quote
Old 27th August 2006, 05:29 AM   #3
sorenj07 is offline sorenj07  Germany
diyAudio Member
sorenj07's Avatar
Join Date: May 2006
Location: Berlin
one schematic you might want to take a look at (it's a starting point) is this Genelex at Bonavolta:


HT on this sucker is about 560V, which will give you 100W at 5% distortion. This figure is somewhat reasonable as you'd never need consistent power at 100W. I'm aware that it's not ultimate-HIFI, and that it only has two tubes at the output, but it's still reasonably interesting.

The full book that explains the circuit is here at


I advise you to take a look at some other books on that site as well, it's well worth it.
  Reply With Quote


100watt mono blocksHide 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
PP KT88 Mono blocks? TubeMack Tubes / Valves 38 11th June 2009 05:41 PM
Bridging Mono Blocks jwatts Tubes / Valves 8 12th February 2005 07:23 PM
TQWT with IGC Mono blocks ronc Chip Amps 4 22nd December 2003 01:05 AM
Rogue 120 Mono Blocks illenema Tubes / Valves 0 3rd November 2003 01:17 PM

New To Site? Need Help?

All times are GMT. The time now is 09:30 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio