Yaesu FT-891, Technical Supplement

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FT-891 Technical Supplement
Alignment
ALIGNMENT-12
CM Coupler Balance Adjustment

C o n n e c t t h e 5 0 - O h m D u m m y L o a d a n d
Wattmeter to the ANT jack.

Connect the Digital DC voltmeter (high-Z) to
TP5003 on the PA Unit.

Connect the Audio Generator to pin 8 of the
Microphone jack (pin 7: GND), then set the
output level to 0.5 mV @1 kHz.

Set the VFO-A frequency to 50.150 MHz in the
USB mode.

Press the PTT switch, then adjust the MIC
gain to set the RF Power output to 50 W on the
Wattmeter.

Press the PTT switch, adjust TC5001 for
minimum deflection on the DC voltmeter (less
than 0.3 V).

Release the PTT switch.
TP5003
TC5001