About Tube Bias Calculator
The Tube Bias Calculator will calculate power tube bias values of Plate Current, Dissipation and % of Max Dissipation using either measured voltage drop across a cathode resistor or measured plate current. It has a...
The Tube Bias Calculator will calculate power tube bias values of Plate Current, Dissipation and % of Max Dissipation using either measured voltage drop across a cathode resistor or measured plate current. It has a database of 36 tube types and will calculate the Class A Fixed, Class AB Fixed Bias and Cathode Bias Maximum Safe Bias settings.
To calculate the tube's Max Safe Bias setting you simply pick your tube from the pick list and enter the Plate-to-Cathode Voltage (plate voltage is always measured between the tube's plate and cathode). The Maximum Safe Bias settings for Class A Fixed, Class AB Fixed Bias and Cathode Bias are displayed.
To calculate bias when you measure the plate current, such as when using the output transformer shunt current measurement, enter your Tube Type and Plate-to-Cathode voltage at the top of the page, enter the Plate Current and touch 'Calculate' and the Plate Dissipation and Dissipation% are shown.
To calculate bias by measuring the voltage drop across a cathode resistor enter your Tube Type and Plate-to-Cathode voltage at the top of the page, enter the Number of Tubes that share the cathode resistor, the Voltage Drop Across the Cathode Resistor and the Cathode Resistor actual resistance. Touch 'Calculate' and the Total Cathode Current, Total Plate Current, Plate Dissipation, Plate Dissipation % & Current per Tube are shown.
To measure the voltage drop across a resistor set your multimeter to volts DC and touch each leg of the resistor with a probe (disregard any minus sign).
WARNING: Amplifiers have high voltage that can KILL even when unplugged. Do not attempt to set an amplifier's bias unless you are competent with test gear and very familiar with high voltage and the dangers involved.
Previous Versions
Here you can find the changelog of Tube Bias Calculator since it was posted on our website on 2016-10-03 12:43:17.
The latest version is and it was updated on 2024-04-22 14:11:06. See below the changes in each version.
Tube Bias Calculator version
Updated At: 2021-11-10
Changes: Updated Android API
Tube Bias Calculator version
Updated At: 2021-04-18
Changes: Added more tubes to the tube database
Tube Bias Calculator version
Updated At: 2020-08-24
Changes: 6V6GTA changed to 14 watts max dissipation. Android 10 ready.
Tube Bias Calculator version
Updated At: 2019-10-11
Changes: Android 9 compatibility.
Tube Bias Calculator version 1.9.6
Updated At: 2017-02-09
Changes: V1.9.6 Added Privacy Policy link.
V1.9.5 Added KT120 and KT150 tubes to tube database.
V1.9.3 Added 12AU7 to tube database.
V1.9.2 Minor editing.
V1.9.1 Removed redundant Plate-to-Cathode Voltage input.
V1.9 Minor editing.
V1.8 Changed 'Plate Voltage' to 'Plate-to-Cathode Voltage. Minor format changes.
V1.7 Corrected 'Bias Using Plate Current' calculation bug.
V1.6 Added 5 new tubes to the database.
V1.5 Minor changes.
V1.4 Minor format changes.
Tube Bias Calculator version 1.9.5
Updated At: 2016-09-21
Changes: V1.9.5 Added KT120 and KT150 tubes to tube database.,V1.9.3 Added 12AU7 to tube database.,V1.9.2 Minor editing.,V1.9.1 Removed redundant Plate-to-Cathode Voltage input.,V1.9 Minor editing.,V1.8 Changed 'Plate Voltage' to 'Plate-to-Cathode Voltage. Minor format changes.,V1.7 Corrected 'Bias Using Plate Current' calculation bug.,V1.6 Added 5 new tubes to the database.,V1.5 Minor changes.,V1.4 Minor format changes.,V1.3 Added more tubes to the database and more detail on the Help page.
Disclaimer
Official Google Play Link
We do not host Tube Bias Calculator on our servers. We did not scan it for viruses, adware, spyware or other type of malware. This app is hosted by Google and passed their terms and conditions to be listed there. We recommend caution when installing it.
The Google Play link for Tube Bias Calculator is provided to you by apps112.com without any warranties, representations or guarantees of any kind, so access it at your own risk.
If you have questions regarding this particular app contact the publisher directly. For questions about the functionalities of apps112.com contact us.
