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Miscellaneous |
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Pspice stuff - a whole new page on it! |
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LTSpice/SwitcherCAD
III - now gets it's own page. |
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Power amplifiers |
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Amplifier classes - What is A, AB1, AB2 etc.??
Check here and find out... |
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Power supplies |
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MOSFET regulator - can these be used for
valve amps? Here's a design that has stood the test of time since the late
'80s. A little over the top maybe, however it delivers high performance and is cheap
to make. |
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Power Supply Designer - a software
package to help you design power supplies, with choices of solid state or vacuum tube
rectifiers. |
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Steve Bench has set up a great series of pages
on his web site for Vacuum
Tube based regulated power supplies. Very comprehensive, and very
well written. Added 20/3/2000. |
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Preamplifiers |
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Baxandall tone stack - how does the
passive Baxandall tone stack compare with the Bass Mid Treble arrangement used on Fender
and many other amplifiers. |
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Baxandall - an excellent technical
explanation by Mark Garvin. |
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Coupling caps - a nice little Excel
5.0 spreadsheet that works out what those coupling caps are doing to your frequency
response [33k]. |
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One-knob
wide range tone control - Roy Mallory developed this for a reverb
unit, but it would be easy to use this for other FX units too. (Added
26/11/2001). |
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Preamp overload - notice a delay before
notes come out, or notes disappear? You may be overloading the preamp stage. |
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Reverb - Roy Mallory
walks you through an optimal design for driving a reverb tank from op-amps.
(Added 1/3/99). |
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Speakers |
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Impedance of speakers - Tired of working
out what the individual power ratings etc.? Grab an Excel 5 spreadsheet that will do
it for you!! |
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Speaker cabinets - Michael
Sabolish gives some great advice on how speaker cabinets can be
constructed for guitar or bass. (Added
21/12/99). |
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Speaker terminology -
ever wondered what an "aggresive speaker" is?? Check out Weber VST's page
on terminology and find out! |
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Test / Modification / Repair |
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Avo Valve Testers
 | Avo CT-160 - The finest valve tester in the
world. Need I say more? Now includes a page on how to
use the CT-160. |
| Other models - some pictures of the other
portable and desktop models are now available on this site. |
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Biasing - How to bias your
amplifier by Lord Valve. LV deals with the cathode resistor and
transformer shunt bias methods, and some handy tables are included to put
you in the right ball park on static bias currents. (Updated
25/8/2001). |
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Blues Deluxe mod - Need more drive on
your Blues Deluxe? Andy Marshman describes a neat way of utilising an unused triode
on these amps.... |
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Oscilloscope Bias Method - An excellent
posting on alt.guitar.amps by Tom Crocker (alias Tom Hiwatt). |
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Speaker load - A great article by Randall
Aiken on the design for a passive speaker load which simulates the impedance and
resonances of a real speaker. |
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Transformers |
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Transformer laminations - Mike LaFevre
of Magnaquest gives some great insight into the different types of laminations and the
reasons for choosing them. |
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Vacuum Tubes |
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Microphonics - A short explanation with
follow up from Kevin Deal of Upscale Audio. |
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Nuvistors - What are they? |
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Vacuum tube numbering schemes - Find out
what those codes actually mean. |
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Valve matching - find out how it's done! |
