oestex.com
Welcome to:
electron's
OPTIMISED
ELECTRON
STREAM
©
APPLIED
ELECTRON TUBE
TECHNOLOGY
for
transmitting, receiving, industrial,
communications, audio, hi-fi, musical and test equipment
in
DIY, industrial, broadcast and commercial
applications
This website is dedicated to the work and memory of Herbert J. Reich PhD., Professor of Electrical Engineering, University of Illinois, who left us his magnificient contribution to explaining electron tube technology through his definitive work - "Theory and Applications of Electron Tubes", McGraw Hill, 1939, 1944
This text has given me more insight and understanding in electron tube behaviour than any other writer.
I commend it to all DIY constructors to
guide you in what you are doing and why you are doing it
Welcome to the Home Page of:
DENNIS
R. GRIMWOOD.
DIY TUBE AUDIOPHILE
It's not what you do but the way that you do it !!!!
This website has been set up to assist people needing information for constructing or servicing transmitting, receiving, industrial, military, communications, audio, hi-fi, musical and test equipment applications.
The information presented herein is based upon a combination of the reported experiences of others, helpful guidance from my electronic guru friends, reference to published texts from people who are considered to be reliable technical experts, electron tube manufacturers' manuals, data sheets, catalogues and technical publications, and my own experiments, research and experiences over more than 50 years.
Every concept presented on this site has been proven by practical application or test to work as claimed.
If you wish to add to the body of knowledge in this field I would welcome your thoughts - please email.
This website includes details of:
To connect
to a page or link please select and click on the blue text where it appears
below
WANTED:
Information about
application, use, performance and history of the type 803 RF pentode, developed
for WWII military transmitter applications.
This tube was made by a number of manufacturers, including Taylor, RCA, Westinghouse, GE, KenRad and Cetron.
I have adequate technical data and ratings but virtually no history or application circuits.
Any assistance relating to the history of the 803 will be appreciated.
If you can help,
please email electron@oestex.com
Tube Design Information for Audio, Broadcast, Modulator and RF Transmitter Service:
Electron
Tubes
This page presents an overview of electron
tubes and how they work in audio and modulator service
How
To
This page presents instructions for designing
and constructing a high-fidelity audio system
Triodes
This page presents information about triode
operation of tetrodes, pentodes and beam power vacuum tubes.
Screen-Grids
This page presents information about requirements
for Screen Grids in vacuum tubes; and triode operation of tetrodes, pentodes
and beam power tubes.
Ultra-Linear
This page presents information about ultra-linear
operation of vacuum tubes.
Optimised
Electron Stream © Technology
This page presents new applied engineering
technologies to improve performance by optimising requirements for the
electron stream in tetrodes, pentodes and beam power tubes.
Optimised
Ultra-Linear © Operation
This page describes
how to optimise conditions for Hi-Fi U/L.
Power
Supplies
This page presents instructions for designing
and constructing a power supply for a high-fidelity amplifier
Tube
Data
This page presents a selection of rare
tube data and circuit design information.
Tube
Design and Applications
This page presents details of how tubes
work and how to use them.
Transformers
This page presents details of audio output
transformers.
Tube
Testing
This page describes the basic principles
for testing Electron Tubes.
Bass
Reflex Enclosure Design
This page presents a proven empirical
method for designing bass reflex loudspeaker enclosures
Tubes for Audio Output and Transmitter Modulator Service:
Audio
Amplifier and Modulator Applications
This page shows
tubes recommended for audio applications
Tube Audio Amplifier and Modulator Circuits:
Audio
Amplifier and Modulator Circuits -
50W RMS to 3000W RMS
This page presents
some interesting circuit diagrams
of selected High Power Amplifiers.
Information is also included for the McIntosh
unity coupled amplifier.
The
Williamson Amplifier and Derivatives -
15W RMS to 100W RMS
This page presents
details of the original and improved Williamson amplifier and a range of
later improved versions from others.
These pages are included for your information and education only.
These designs use very high voltages - which can be terminally lethal, require a high level of experience and understanding in amplifier design and construction - particularly component selection, hardware and wiring layout - and are definitely not recommended for the inexperienced or first-time amateur hobbyist to try to construct.
All circuits and information are copyright in their original owner.
The
McIntosh Amplifier - 50W
RMS to 350W RMS
This page presents
some information about the McIntosh range of tube audio amplifiers.
Tube Audio Pre-Amplifier and Control Unit Circuits:
Tube
Audio Pre-Amplifier and Control Unit Circuits
This page presents
some interesting circuit diagrams
of selected High-Fidelity Audio
Control Units.
Hearing and Hi-Fi Audio:
The HEARING AND HI-FIpages describe what you might hear from hi-fi audio.
These pages show the frequency range of many of the common instruments that we want to reproduce from our audio system.
Can you really hear what you think you can hear??
Hearing and Hi-Fi: Daniel H. Cheever
The following articles, courtesy of Electronics Australia, June 1983 edition, may cause you to reconsider what you are actually hearing!!
Tubes and Components for Sale or Swap:
Tubes
This page presents a selection of tubes
and components available for sale or swap
Parts
This page presents details of components
available for sale or swap
Extra Special Links:
Extra
Special Links
This page shows
references to links that I feel are really special for students and users
of electron tubes.
Recommended Tube Suppliers:
Suppliers
This page lists suppliers I personally
recommend.
Management Related Topics:
Principles
of Technology
This page presents
a selection of principles that apply to the development and application
of technologies.
Principles
of Organisation
This page presents
a selection of principles that apply to the design and behaviour of organisations
and the people who run them - a little tongue in cheek but true.
Quality
Consciousness
This page describes
a model for developing quality consciousness in organisations
Integrated
Management Systems
This page describes
a model for integrating management systems in organisations - eg quality,
safety, environmental, operations, financial, logistics etc
To hear is to forget
To see is to remember
To do is to learn
To learn is to know
To know is to grow
To grow is to give
To give is to liveAnon
Knowing is not enough; we must apply.
Willing is not enough; we must do.
"Of all the inventions that have ever made scientific history, the discovery by Lee DeForest that a few turns of wire in between the two elements of a diode vacuum tube were able to control the flow of electrons, can without doubt be classed as among the foremost in its benefits to mankind.
Not only has the
three-element vacuum tube been the means of providing entertainment and
education to millions of people throughout the world, but it has been proved
to be the keystone in the arch upon which has been built innumerable branches
of scientific thought."
Experience is something you don't get until just after you need it!!
Experience comes from bad judgement. Good judgement comes from experience.
Good judgement in audiophilia is to forget about how it "sounds" - just enjoy the music!!!!
electron
"I haven't failed. I've found 10,000 ways that don't work." - Thomas Edison
Never be afraid
to try something new.
Remember
that a lone amateur built the Ark.
A large group
of professionals built the Titanic
"Creativity requires
the courage to let go of certainties." - Erich Fromm
If it tests good and sounds bad, you might be an engineer or scientist !!
If it tests good and sounds good you might be an audiophile !!
If it tests bad and sounds good, you might be musician !!
If you find yourself
constantly striving to make it better - regardless of how well it tests
or how well it performs -
then you just
might be a DIY inventor !!
The pursuit of excellence is excellent in itself.
A message for all:
"Let the Golden Rule Overrule the Rule of Gold"
Note for the uninitiated:
The Golden Rule is: "Do unto others as you would have them do unto you".
The Rule of Gold is: "He who has the gold
makes the rule"
Contact:
Dennis Grimwood
Phone: +61 8 9399 5219
Email: electron@oestex.com
Location:
The
City of Armadale. (My home town)
Perth,
Western Australia,
AUSTRALIA
Page last updated 7 April 2012
This page URL is http://www.oestex.com/tubes/index.html
806 graphic courtesy "Radiotronics"
magazine April 1939
