Technical Information

Part Number recommendations for output transformers

Application Note 01. High Voltage Power Supply. Design Considerations

Application Note 05. The White Spark Problem

Application Note 06. Center tapped heaters (V4 tubes)

Application Note 07. (In preparation) Designing with the 20B tube

Application Note 08. Grid Voltage Measurement Methods

Power Supply Design Note-2

Techical Bulletin TB 01. Getter Materials

Techical Bulletin TB 02. Filament Quality

Techical Bulletin TB 03. Current Source Supply for the Filament

Techical Bulletin TB 04. Mains Voltage problems and solutions

Techical Bulletin TB 05. Heater Voltage vs. Tube life

Techical Bulletin TB 06. PX4 Confusion after 90 years resolved

Techical Bulletin TB 08. How to test EML tubes

Techical Bulletin TB 09. Why DC heated tubes can still hum

What makes good "tube sound"?