Vacuum Tube Design and Application Notes. Some interesting active tone control circuits. Simple tools you can make. Techniques to achieve Self-Split Push-Pull output stages. Using 12AU7 triodes with a split plate load. Using 6V6 or similar power tubes with a screen-fed arrangement. The self-split occurs through the push-pull cathode load.

This site is being built gradually, please check back again soon. This picture shows an 813 based Hartley oscillator transmitter being tested with a makeshift power supply. You can read more about this project and some others on my projects page.

Thermionic diodes are thermionic valve devices. Saturday, February 2, 2008. Thermionic diodes are thermionic valve devices. Although the crystal diode was popularized before the thermionic diode, thermionic and solid state diodes developed in parallel. The principle of operation of thermionic. Diodes was discovered by Frederick Guthrie. The principle of operation of crystal diodes was discovered in 1874 by the German scientist, Karl Ferdinand Braun. And he was awarded a patent in 1883.

Thermion has become recognized as. The most reliable high production metalizing systems in the world. Thermion has become recognized as. The most reliable high production metalizing systems in the world. Thermal Arc Spray Systems and Coatings. Thermion is the manufacturer of Twin Wire Arc Spray Equipment.