Am Transmission - Yaesu FT-847 Operating Manual

Hf + v-uhf all mode transceiver
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OPERATION
The FT-847 includes provision for AM transmission using an early-stage modulator.
Connect your microphone to the front panel MIC
jack. Preset the MIC (G
clockwise.
Press the FM/AM mode key, as necessary, to select
the "AM" operating mode.
ƒ
Rotate the MAIN VFO Tuning Dial to set the oper-
ating frequency.
Close the microphone's PTT switch, and adjust the
RF PWR control so that the power output is 33%
of the rated maximum output for the band in use
(i.e. 33 Watts on 1.8 ~ 54 MHz, or 16.5 Watts on
144/430 MHz). This is the setting of the carrier
level which ensures adequate power for the modu-
lation sidebands. To activate transmission, you may
also use the front panel's MOX switch, if you pre-
fer.
...
Advance the MIC (G
speaking, at a normal voice level, into the micro-
phone. Advance the gain to the point where a slight
upward deflection in the power output reading is
observed on voice peaks. This is the point where
approximately 100% modulation is achieved.
Release the PTT (or MOX) switch to return to the
receive mode.
58
AM T
) control fully counter-
AIN
) control clockwise while
AIN
RANSMISSION
FT-847 O
M
PERATING
ANUAL

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