Yaesu FT-101E Instruction Manual page 25

There is a littl difference in the wile current between
AC and BC operation, Adjust the idle eurrent to 60
my for each operation,
11. POWER OUTPUT METER ADJUSTMENT
VR. located on the transceiver rear panel adjacent
to the antenna coax fitting, provides an adjustment for
power output indication on the meter.
This potentiometer should be adjusted to indicate 1/2
to 2/4. full seale meter deflection when the transmitter
ig producing full output power in the tune position.
it should be noted that the meter indicates relative
power output and is not the basis for determining
actual power output,
VR6 has been preset at the factory to read 1/2 to
2/3 full seale into a 52 ohm dummy load. The operator
Should not indiscriminately adjust VRG into an unknown
load or an antenna with high VSWR.
12. FINAL AMPLIFIER NEUTRALIZATION
When replacing the final amplifier tubes, it may be
necessary to resel the bias to give correct idle current
and check neutralization, Using the procedure outline
below will guarantee maximum output and long tube
life
CAUTION
HIGH VOLTAGES ARE PRESENT ON UNDER
SIDE OF CHASSIS AND INSIDE OF FINAL
COMPARTMENT. USE GREAT CARE WHILE
MAKING ADIUSTMENTS WITH WIRING EX
POSED,
dees
ti
FINAL AMPLIFIER COMPARTMENT
(1) Connect a dummy load to antenna, and set. meter
to TC,
(2) Locate TC27 the neutralization variable capacitor
the the the
driver stage band switch wafer, in the final ampli.
shaft on underside of chassis. near
fier section,
(3) Check final amplifier idle current in USB or LSB
position and adjust as described before.
200m A,
) Rotate PLATE tuning centro) and observe dip as
Indicated on the meter. othe dip is not prominent,
reduce the loadme control shehtly for better indi.
cation. As the PLATE control is rotated the meter
(6) Determine which side of the dip. rises abruptly
set PLATE control slightly to this side of dip
keeping the meter reading below LOO) mA,
=J
Repeat steps 6 and 7 until the meter indicates a
smooth and equal rise on either side of the maxi
mum dip point.
The final compartment cover must be in place to supply
the
procedure.
RF shielding required during the neutralization
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