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by John Atwood
Born just before America’s entry into World-War II, the 6SN7GT dual triode had a precocious childhood, becoming one of the most common tubes by the end of the war. Despite competition from younger, smaller upstarts, the 6SN7GT was widely designed into consumer, industrial, and military equipment throughout the 1950s, and as a replacement [...]

by Lord Valve

Revised 08/24/01
DISCLAIMER: LORD VALVE (W. WHITTAKER DBA NBS ELECTRONICS) WILL TAKE NO RESPONSIBILITY FOR ANY INJURIES OR DAMAGE SUFFERED BY ANYONE AS A RESULT OF THE MISINTERPRETATION OR MISAPPLICATION OF THE INFORMATION CONTAINED IN THIS ARTICLE. PROPER HIGH- VOLTAGE SAFETY PROCEDURES AND PRECAUTIONS MUST BE PRACTICED AT ALL TIMES WHEN SERVICING VACUUM [...]

This is the method I use to bias my amps. It’s not the only way to bias your output tubes, but I think it’s the safest and easiest method.
Essentially, you want to bias your amp such that the plate dissipation rating of the output tubes is not exceeded. Plate dissipation is measured in watts [...]

Introduction

This is a recipe to construct some very simple diy speaker cables. I use these cables with my DIY Hi-Vi 3-Way Speakers. The following materials were used for these simple DIY Speaker Cables:

What is a Vacuum Tube ?
In electronics, a vacuum tube (U.S. and Canadian English) or (thermionic) valve (outside North America) is a device generally used to amplify, or otherwise modify, a signal by controlling the movement of electrons in an evacuated space. For most purposes, the vacuum tube has been replaced by the much [...]

This article covers commonly used vacuum tube amplifier configurations with emphasis on types used in veteran radios and veteran communication equipment. The article discusses each configuration first at a fairly elementary level, aimed at readers with limited technical insight or readers who just want an overview of the amplifier type. After this, some of the [...]

A special effects are usually gained from an effects pedal. The pedal is separate from your amp and needs to be plugged in and used as a separate tool. While this can be a cheaper option, buying an amp with the effects built in can be simpler and better quality in the long term. There’s [...]

Single-ended tube amplifier with two 1626 tubes in parallel per channel
Six JAN (joined army navy) tubes, after some 40 years of rest, finally make music…
I started this project with the idea to build a simple single-ended tube amplifier. I didn’t have any experience with the construction of tube amps so I was looking for a [...]

When you’re suffering the itch to improve your system but can’t find the money, a possible solution is to spend some time fiddling with your turntable. (If you’ve gone CD-only, you’re out of luck here.) Like everything else, the delicate mechanics of turntables are subject to the laws of entropy and will gradually drift out [...]

This is such an in depth subject that I will reserve my input to this component to more basic explanations and leave the permeability and make-up of core material, magnetic flux density, shunt capacitance/inductance, electromagnetic theory and the like
to references.

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