BIASMASTER System BM2

BM2
€ 129,80
(incl. Tax excl. shipping)
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Partnumber: BM2
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BIASMASTER System BM2

Measures BIAS current of any 6L6GC, 6550, EL34, 6V6GT, 5881, KT66, KT88, KT90, KT100, KT120, 7027A etc. in your amp.
Includes 2 octal probes (1x BMA2) and english/german operation manual.  
The BiasMaster(TM) allows to monitor the bias current savely and easily. While adjusting the Bias control pot of your amp the BiasMaster(TM) does show the actual result. This lets you set and evaluate all reasonable biasing range your amp and tubes offers to find and set your personal perfect choice.
The Bias setting has a dramatic impact on the amps respsonse, break-up and dynamic character. 

RohS Compliant
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Peter De Coninck (5/5)

Super-duper handy tool !

Robert Platt (5/5)

Simple and easy to use.

I measured the bias current in my amp with the 'stock' tubes, so I know what it should be when I replace them. On my amp, I had to remove the chassis because there isn't enough space inside to fit the adapters.

Careful, some amps have the 'standby' switch wired in series with the power tube's cathodes, so there can be a few volts on the aluminum faceplate of the meter (_50V DC with my amp!) when the standby switch is off. If you don't know what this means, let your tech do the work on your amp.

didier joris (5/5)

One of the most rewarding tools in my workshop, i couldn't live without it anymore!
Be carefull with the octal probes, they are a little fragile but if you use them in a normal way (without excessive force) they will last a long time!

Mark Burness (5/5)

Quick and easy to use.

Accuracy checked against transformer shunt method with Fluke multimeter...spot on and much safer to use!

Essential bit of kit for those who like playing with their output tubes. If you have a bias pot, it pays for itself after a handful of installations, compared to a tech's rebiasing fee.
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