1 5. TRA P CO i L ALIG N M ENT
( 1 ) T107 is used to el iminate the d i rect- feed- through in
terference at the I F frequency . and tuned to 5 .720
K Hz. Set the transceiver at 7.300 KHz LSB in receive
mode and peak the PRESELECTO R for maximum
n oise output. Set the R F signal generator to 5 , 7 2 0
K Hz a n d increase t h e signal generator output until a n
audio beat note is heard. Adj ust T107 for minimum
audio output.
( 2 ) L29 on the printed circuit board l ocated near the
an tenna change-over relay RL2 is also used to
eliminate the d irect - feed-through interference. Set the
transceiver at 7.080 KHz in
the
receive mode. Tune
the R F signal generator to 5 ,940 K Hz. A dj ust L29
for m inimum S-meter reading.
3 ) L 2 2 eliminates the interference by 9th h armonic of
the carrier oscillator. Tune the transceiver to 28.600
KHz USB in the receive mode. and increase RF and
A F gain control until an audio beat note is heard.
A dj u st L2 2 for minimum audio output.
CAU T ION
Contin uous f u l l output for more than
1 0
seconds may res u l t i n destruct i o n of f i n a l
t u be.
( 4 ) T 1 1 3 i n t h e h igh frequency I F u n it is used t o e l
iminated spurious radiation on the 2 0 m eter band. For
alignm ent. tune transceiver to max im u m output at
1 4 .3 5 0 KHz in the tune postion . Measure the spu rious
radiation. by using the S-meter of another receiver
tuned
to 1 4 .5 2 0 KHz w here a spurious radiation
can be
heard.
Adj ust T113 for m inimum S-meter
reading w i hout decreasing the power output o f the
transceiver.
( 5 ) T115 is located on the printed circuit board near the
VFO unit and is used to suppress carrier oscillator
feed-through . Tune the transceiver to any frequency
and load it to ful l output. Reduce the m icrophone
gai n to zero and place the mode sw itch in
the
USB position. Adj ust T115 for m inimum S-meter
read ing on the receiver.
(6) L28 is used to eli m inate spurious radiation on the 15
meter band. Tune the transceiver to max i m u m output
at 2 1 . 2 00 K Hz in the tune position. Locate the spuri
ous radiation at 2 1 . 2 2 0 K Hz by another receiver.
Adjust L28 for minimum S-meter reading on
the
receiver .
( 7 ) TC30 connected i n series w ith L3 2 on the printed
circuit board located on the main chassis near the
relay R Ll is used to eli m inate spurious radiation on
10 meter band. For alignm ent. tune
transcciYer
to
max imum out put at 28,500 K Hz in the tune position.
Measure the spurious rad iation by using the S-meter
of another receiver tuned to 2 8 .160 K Hz where the
spurious signal can be heard. A dj ust TC3 0
for
minimu m S-meter reading w ithou t decreasing
the
powPr output of the transceiver.
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