• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Need Help Biasing TRV-M300SE Amps

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Hi All,

I own a pair of Triode Corporation TRV-M300SE mono-block power amps and would like to install a new quad set of TJ 300B mesh (perforated) plate tubes. I have read these amps operate on a FIXED BIAS principle but the included operating manual does not list any information about the biasing procedure required when installing 300B tubes.

I have contacted Triode Corporation asking for assistance without success. More so I do not have access to any circuit diagram. I have included a photo of the inside and am hoping for some guidance and instructions in reference to adjusting the pots shown at VR2 and VR3.

A million thanks in advance for any assistance provided.
 

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