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Bias Pot Bias Jack
< 845 Tubes >
6CA7 Tube
6SL7 Tube
Power
Standby
300B
300B
Set the 845 tube
bias to 100 mA DC
Current
¼” bias plug
The 211FE is equipped with a built in bias meter on the front of the chassis. The adjustment pot is located
at the back of the chassis along with a bias jack for an external meter. Check the 845 tube bias current and
adjust for a 100 mA reading. The meter is marked “SET” at the 100mA mark. Check and readjust to 100 mA
again after the CAD 211FE amplifier is warmed up for 10 minutes.
Note: Bias is factory preset to 100 mA. Bias should be reset when installing a new
replacement 845 tube.
The LARGE pair of 300B tube pins should be installed toward the front of the CAD 211 FE amplifier tube
socket. Look carefully at the tube pins to be sure that you insert them correctly. It is possible to force the
tube pins into the socket the wrong way if you are not careful! If you install the tube wrong you will
probably damage the amplifier and the tube. This damage will not be covered by the manufacturers
warranty for a new amplifier. If you have any doubts about this, have the 300B tube installed by your
dealer.
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