Use As A Signal Generator; Use As Crystal Checker And Marker Generator - Kenwood DM-81 Manual

KENWOOD DM-81

Use as a Signal Generator

Your DM-81 can be used as a signal generator for aligning receivers and similar
equipment. Couple the dip meter to the antenna circuit of the receiver as
illustrated in Figure 6. The dip meter output carrier will enter the receiver. For
aligning an AM receiver, set the FUNCTION switch to "MOD". The receiver will
sound a 1kHz tone. Aligning SSB and CW receivers can be achieved by leaving
the switch at "OSC" for no modulation. Adjust the capacitor trimmers and
inductor cores for maximum receiver "S" meter reading or maximum speaker
output.

Use as Crystal Checker and Marker Generator

Your DM-81 car, be modified as a crystal checker by installing a crystal in Place
of the oscillation coil (see Figure 7).
You may use either HC-25U or FT-243 crystals. Also, an HC-6U crystal can be
checked if plugged into the FT-243 socket. The oscillation signal strength may
vary depending on the type and frequency of the crystal used. Adjust the dial for
most stable oscillation.
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