	DON'T RUIN A BRAND NEW SET OF TUBES GET IT RIGHT THE FIRST TIME

How It Works

By utilizing a sophisticated RISC Microprocessor the Compu-Bias™ monitors both the cathode to plate voltage and cathode current while calculating the total tube dissipation dynamically displaying it in real time.

The measurements start with the probes.
The probes are placed between the amplifier and tube allowing access to the various points required to make the voltage and current measurements.

These voltages are converted in the probes to low level values and fed to the Compu-Bias™ for measurement.

The Compu-Bias™ then mathematically calculates the total tube dissipation.

The values of plate voltage, cathode current and tube dissipation for each tube are displayed on an easy to read LCD display in the Compu-Bias™.

The Compu-Bias™ can dynamically display the values for up to 2 tubes simultaneously.

Powers up automatically when probe 1 is attached.

Powered by a standard 9v transistor battery. Extremely low power consumption and sleep mode for extended battery life.

NO NEED TO TAKE THE AMP APART
CHECK OUTPUT TUBE BIAS IN 3 SIMPLE STEPS

1. LOCATE POWER TUBES

2. REMOVE POWER TUBES

3. INSTALL POWER TUBES AND COMPU-BIAS

Easily match output tubes in most amps

Set up your amp for the sound you want and verify you have the correct bias

Accuracy displays actual tube dissipation
(Iscreen+Iplate)*Vplate=Total Dissipation

Safer than using an ammeter across the output transformer

You no longer need to modify every amp you work on with a cathode resistor

No need drill holes and add jacks

Safely measure plate voltage

Easy to use

Battery Powered works with any filament voltage AC or DC

Automatic

Great for DIY HIFI or Guitar

Great for Experienced users

Can cut your bench time in half when setting bias

Works with Cathode or Fixed bias amps

Upgradeable Software

CAUTION:
Do not plug the Compu-Bias into a broken amplifier. It won't fix anything and may damage the Compu-Bias.
Verify the tube and probe center pin keys are properly aligned before applying power (see manual).
Do not plug into rectifier socket.
Do not use the Compu-Bias if the probes or leads are damaged.
Potentially Lethal voltages exist inside any vacuum tube amplifier this includes the tube sockets.

If you need to change the bias and do not possess the technical knowledge required to perform this task. Take the amp to experienced technician as it requires knowledge of electronic circuits and high voltage safety..

This device is sold as an industrial/commercial test device. Any provided text is offered as a guide in the use/operation of this device (Compu-Bias bias meter) only. Compu-Bias is not responsible for any errors or omissions in this text. Neither Compu-Bias nor any other entity can or will be liable for any damage be it personal, property or monetary that may occur regarding this text or use of this device. This includes the amplifier or tubes being tested. This device may be in contact with potentially lethal voltages. The operator/user should have appropriate technical expertise commensurate with the tasks required. If while using or operating the Compu-Bias or any other device of this type the user/operator requires technical assistance it is the responsibility of user/operator to acquire that assistance. Use of any device without an appropriate ground is not advised.

Do not use this or any other device with damaged probes or poor protective ground connections.

We reserve the right to change, alter or delete any of the contents of this web site at any time.
05-07 RML

Compu-Bias reserves the right to change or cancel any information listed including availability, specifications, and technical information appearing on this site at any time without notice.