Re: gt6l6b/sovtek 6l6wxt
well, this is all the info i could get
GT-6L6-R (B) Duet
Russian made, same as the 5881 you are using now, but when these are matched in our system they are improved. These are a very sturdy and reliable tube. Red = GT 8-10 rating
The Sovtek 5881WXT is the same as the 5881 but with a full size base for easy installation in vintage amp designs.
The Sovtek 5881 delivers a warm, round tone that "sweetens" any vintage or modern guitar amp design. Chances are if an amp uses 6L6-style output tubes, it has Sovtek 5881's in its sockets. Built to rigid military standards, the 5881 will tolerate higher voltages than any other 6L6. In fact, they're frequently used as replacements for the old 7027 model in vintage Ampegs. Extremely consistent from piece to piece, The Sovtek 5881 is the most reliable current production 6L6 available. Used by Marshall, Soldano, Solo, and others.
The Sovtek 5881 has a heater voltage of 6.3 volts at 0.88 amperes. Maximum plate voltage is 250 volts while maximum plate current is 73 mA. The 5881 has a Transconductance rating of 6000 micromhos and a maximum output power of 5.8 watts.
sorry for the persistance but i was really hoping it'd be a safe swap