B&K
700-707
Calibration
SENSITIVITY POT
R5 BRIDGE BALANCE
R16 / SHORTS /
SOCKET 30
R17
GRID EMISSIONS
SOCKET 33
R20
SIGNAL VOLTAGE
SOCKET 25
R11 DC BIAS
SENSITIVITY POT
R5 BRIDGE BALANCE
R16 / SHORTS /
SOCKET 30
R17
GRID EMISSIONS
SOCKET 33
R20
SIGNAL VOLTAGE
SOCKET 25
R11 DC BIAS
Locations of pots / trimmers to be adjusted. Several are accessed from the front panel of the tester through the
center of certain tube sockets. If a socket number is indicated, access from the front panel.
The size of certain potentiometers such as R20 changed over the years. Do not panic if photos do not match
exactly. It is the location of the unit that is important!
Socket #1 is used with our calibration set. It is important to understand the tube socket pinout as it is not counted
in a standard clockwise rotation. When looking at a tube socket from the top, pin numbers go counter-clockwise as
shown below
7
6
5
4
3
2
1
7
6
5
4
3
2
1
SOCKET 1 PINOUT
(TOP VIEW)
