Kenwood TS-820 Operating Manual page 13

the transceiver. Fixed frequency operation is convenient for
operation on often used frequencies. The fixed channel os-
cillator replaces the VFO when the FUNCTION switch is pla-
ced in the FIX position.
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DRIVE K N O B
The DRIVE tuning control tunes the plate tank circuit of the
12BY7A driver as well as receiver's antenna and mixer
coils. I n receive the DRIVE control is tuned for maximum
sensitivity lmaximum S-meter deflection). In transmit the
DRIVE control 1 s tuned for a maximum ALC reading. When
the control is correctly tuned for transmission it will be cor-
rectly tuned for reception.
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PLATE K N O B
The PLATE control adjusts tlie plate tuning o f the t w o final
ampl~fier tubes.
Rear Panel View
L O A D K N O B
The LOAD control adjusts the loading of the pi-circuit bet-
ween the final section and the antenna. The control is adjust
as described in Section
4
for impedance matching.
D H (DISPLAY H O L D ) S W I T C H
( W H E N T H E DISPLAY D G - l I S USED.)
With this switch set to ON. the frequency below 100 kHz on
the display dial remains on even when the main dial knob is
rotated. This feature is useful to memorize the original f r e ~
quency when checking other frequencies. The DH switch
being ON turns off the liglits for "MHz" frequencies, e l i m i n a ~
ting a worry about mis-reading frequencies.