Yaesu FTDX9000MP Operation Manual page 101

SSB/AM M SSB/AM M SSB/AM M
SSB/AM M SSB/AM M
Class-A operation provides a significant improvement in transmitter distortion suppression. During Class-A, the
3rd-order IMD products are typically suppressed 50 dB, while the 5th- and higher-order IMD products (that can
cause "splatter" that interferes with others) will typically be suppressed 70 dB or more.
If you are using a linear amplifier such as the VL-1000, the low distortion produced by the FT
transmitter means that these intermodulation distortion products will not exist to be amplified by your linear.
High-Power 400-Watt Final Amplifier Stage
The final amplifier stage of the FT
MOSFET devices operating at 50 Volts. This parallel push-pull configuration provides low distortion along with
high power output. The 120 mm thermostatically-controlled cooling fan directs forced air across the heat sink,
should the heat sink temperature exceed the temperature that will trigger the thermostat.
FT 9000MP O
DX PERATION
T T T T T
ODE ODE ODE RANSMISSION (L (L (L (L (L RANSMISSION RANSMISSION
ODE ODE RANSMISSION RANSMISSION
L - D
OW ISTORTION
Continuous adjustment of the
Bias Level between Class-A
and Class-AB is possible.
Class-AB
C -AB C
LASS AND LASS
Q Q Q Q Q
UICK UICK UICK UICK UICK
9000MP utilizes a parallel pair of ST Micro Electronics Corp. SD2931
DX
M
ANUAL
- D - D - D - D - D
O O O O O W W W W W IST IST IST IST ISTOR OR OR OR ORTION
CLASS-A O
PERATION
Class-A
-A O P
PERATING RINCIPLE
P P P P P
OINT OINT OINT OINT OINT
CLASS-A O CLASS-A O
CLASS-A O CLASS-A O CLASS-A O
TION TION TION PERA PERATION PERA TION TION TION
TION PERA PERA TION
Input
9000MP's
DX
Page 99
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