Technical Information

Last Update:

The LAB Report
Some internal Information about what we are doing
Application Notes
High Voltage Power Supply Design (1)	Application Note 1
High Voltage Power Supply Design (2)	Application Note 2
Cathode Tapped heaters (V4 tubes)	Application Note 6
(In preparation) Designing with the 12B, 20A/B, 30A tube	Application Note 7
Control Grid Voltage Measurement Methods	Application Note 8
Power Supply Design	Application Note 9
Recommendations for output transformers	Application Note 10
Upgrade a 300B tube	Application Note 11
How to bias the 45B tube	Application Note 14

Technical Bulletins
About Resources	Technical Bulletin 00
Filament Quality	Technical Bulletin 02
Current Source Supply for the Filament	Technical Bulletin 03
Mains Voltage problems and solutions	Technical Bulletin 04
Heater Voltage vs. Tube life	Technical Bulletin 05
PX4 Confusion after 90 years resolved	Technical Bulletin 06
How to test EML tubes	Technical Bulletin 08
Why DC heated tubes can still hum	Technical Bulletin 09
Lifetime of the 45 tube - an amazing result	Technical Bulletin 10
The White Spark Problem / Cathode Issues	Technical Bulletin 11
What makes good tube sound?	Technical Bulletin 12
Getter Materials	Technical Bulletin 13

Tests and Projects with EML tubes LInk here