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The FTV-901 R has been carefully aligned and
tested at the factory prior to shipment. With
normal use, if the unit is not abused, the FT-901 R
will provide many years of trouble-free operation .
Sudden difficulties are usually the result of parts
failures, rather than alignment problems. There
fore, alignment should not be undertaken unless
the operation of the transverter is completely
understood,
the
fault
diagnosed, and the trouble has been definitely
traced to misalignment rather than part failure.
Attempts to align this equipment by other than an
experienced technician are discouraged.
For alignment purposes, a VTVM with RF probe
450
good to
MHz is required. Also, a signal
450
generator good to
counter good to 250 MHz are required. A dummy
load and wattmeter good to
required.
REG UNIT (PB-1975)
Connect a DC voltmeter to pin 11 of multijack
M J l , 2, or 3. Adjust VR17 01 for a reading of
13.8 volts.
MAINTENANCE AND ALIGNMENT
has
been
throughly
MHz, and a frequency
450
MHz are also
ALC UNIT
OUTPUT
ALC AMP UNIT (PB-1946)
( 1)
Set the HF transceiver to 29 MHz, CW mode.
( 2)
Connect the RF probe of the VTVM to the
input of the ALC AMP unit, and adjust the
HF transceiver DRIVE or CARRIER control
for an output of 3 volts RM S while transmit
ting.
(3)
Connect the DC voltmeter between the hot
lead and case of C 1 8 1 8. Set the ALC meter to
AM. Adjust VR1 802 for a reading of
on the voltmeter.
(4)
Connect the RF probe of the VTVM to the
output of the ALC AMP unit. Adjust T 1 8 01
for a maximum VTVM indication. Adjust
VR 1 803 for a maximum VTVM indication
(0.7 volts nom.).
(5)
Set the FTV-901R meter switch to INPUT.
Adjust VR 1 801 for a reading of . 2 on the
meter.
V R 19os
-
V R 1902
V R 1901
C 1818
ALC UNIT
INPUT
- 2 1 -
5
volts
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