Ten-Tec 238C manual
Part #74428
First release, June 2009. Printed in U.S.A.
METER CALIBRATION
A metal plate is installed on the front of the
238C with 4 Philips screws. This plate has
the markings for the capacitor, inductor and
center impedance switch. It can be
removed without taking off either of the two
main knobs or the center switch knob.
Disconnect the tuner from DC power
connected to the rear panel 13.5 VDC jack.
Remove the 4 screws that hold the metal
plate in place and the metal plate itself.
Behind the metal plate are two plastic
screws for each meter movement. Adjust
each as needed to reset the indication to ‘0’.
Re-install metal plate and reconnect DC
power.
