Brand : AMPTATA

Model : T4

It's suitable for:

EL34 KT88 6L6 6CA7 6V6 5881 6550 KT66 KT100 KT120

EL84 6BQ5 6P14

3.5mm Male Plug

Outstanding soldering taken in every adapter.

The product measures the cathode current of the power tube for bias reading (at low voltage side of the tubes ).

It can Get the reading direct from the current meter.

It does not need any convert from mV to mA.

It can be work with all kinds of multi meter (Digital meter or analog pointer meters) , at range of 100mA or above.

Package Contents

1pcs T4 Tester

2pcs 8pin EL34 Bias Current Probes

2pcs 9pin EL84 Bias Current Probes

User Manual

01: Turn off amplifier.

02: Remove the tubes then plug in tester probes socket.

03: Then plug tester probes in amplifier socket.

04: Turn on amp and let tubes get warm about 5 minutes.Just turn on the amplifier without let speaker sing.

05: Read the bias measurement.

06: Switch from A to B. Get two reading

07: If tube reading is same.That's perfect. If reading is different. Should be no more than 2 or 3 mA difference for a good balance between the tube

T4 DIY Vacuum Tube Tester 9pin and Octal 8pin Dual Bias Current Probes Tester Meter for EL84 6BQ5 EL34 KT88 6L6 6CA7 6V6 5881 6550 KT66 KT100 KT120 Vacuum Tube Amp Amplifier Cathode Current …