download power amp
the Torres/Dupont 30 to 200 Watt Monoblock
Power amp Plans.
This amp was
Dupont company and turned out as one of the most amazing power amps and
the most flexible design we, or anyone else, have ever made.
The Amp is
really easy to
build and could be your first project. Just follow the plans and she
works first time every time. It is designed to be build on a simple box
Hammond 260 series with three different models specified in the plans
for the different power ranges. The trans can be wired for
or all the export voltages and is rugged, solid, amazing sounding,
super dependable, and CSA rated - couldn't be better. One of Dan
Torres's favorite transformers to work with.
It is capable of
a very wide
range of tubes with just a change in transformers and bias and can be
set up for anything from 30 watts with 6V6 tubes to 200 watts with
KT88's with perfect tone all the way. See "INSIDE
TUBE AMPS" by Dan Torres for Output Transformer Primary
impedences and extensive bias information.
Tubes that can
6V6 = 30 watts
4 X 6L6
4 X 5881
4 X EL34
4 X 6CA7
4 X KT66
4 X KT77
4 X 6550
4 X KT88 = 200 watts
The driver is
EF86 wired as a super clean triode and a 12AT7
self-balancing Phase Inverter adapted from the book "AUDIO DESIGN
HANDBOOK" by H.A. Hartley (1958 Gersnback Library - long
out of print). A great sounding clean drive section
the need of negative feedback in the amp.
The power supply
an extra stage of primary filtering to reduce ripple by about 1000
times over normal amps (see "INSIDE
TUBE AMPS") for a super quiet amp with fantastic bass
reponse, a secondary advantage of this special power section.
The main power
filter caps bypassed by a Torres Custom Metal Poly Orange Cap to
improve transient response and reduce phase change. Another great trick
in the amp's design.
from below hearing at about 20 cycle to as far as 50,000 - Use a guitar
preamp (all tube coming from Torres
for one of the most massive sounding power amps you will ever hear. A
real "head turner". Artiquilate, fantastic tone.
As your home
(you need to
build two monoblocks) with a nice vintage preamp such as a
Dynaco, Marantz, Heathkit, Eico, MacIntosh, Knight etc. or our new one
(also coming up) well, incredible liquid, clear, colorful tone. just
replace the guitar input jack with an RCA and the Output Jacks with
A really great
project with a
ton of stuff to learn from the drawings. Full assembly plans
included in the Download plus the schematic and parts list.
The amp can have
Voltage regulator and DC Filaments for the drive section and
other upgrades coming along in the future.
The original for
Dupont/Billington company is in a research lab maybe running on a
battery power supply we designed for them.
All parts and a complete kit are available from the Torres
Engineering Web Site.
This is a DIY (do it yourself) project. not a kit.
You will need an unzip program to extract the zip file.
Everything is in virus-free PDF format.
Your download will appear as a DOWNLOAD button on the order
confirmation page. You can also get to it, even from another computer
from the ORDER STATUS PAGE. if you have trouble, please contact us with
your order # and we will send you a copy
final notes on web page
Legendary Book "Inside Tube Amps" is now
available on Amazon/Kindle
Torres Engineering 2018. All rights reserved.
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City CA 95993
is not a "walk in" shop
I am Partially retired due to
but getting better!
in business 48 years