Cary Audio Design CAD 211 FE - Manual (Page 14)

DIAGRAMS
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.
Set the 845 tube
bias to 100 mA DC
Current
¼” bias plug
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