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= ADJUSTMENTS
OF TS- 515 TRANSMIT SECTION
1.
Final bias
(1) Purpose:
To set the final base current.
(2) No measuring instrument is necessary.
(3) Adjusting procedures:
1)
2)
3)
4)
5)
Connect the OUT terminal of the carrier unit
to the earth with the capacitor of 0.01nF.
Set the
drive
knob
to the
position
of '9
o'clock'
Set the MODE
switch to L S B, the BAND
select switch to 14MHz
and the STAND-BY
switch to SEND.
Set the METER
switch to Ip and then adjust
the BIAS VR (VR5) to obtain !p = GOmA.
Return
the STAND-BY
switch
to REC
pasi-
tion and remove
the 0.01yuF capacitor which
is shortening the out terminal
of the carrier
unit.
2.
Adjustment of IFT in the 'BM stage and carrier
28
level.
(1) Purpose:
To adjust the {FT (3.395MHz) in the BM stage and
set the carrier level of CW.
(2)
(3)
1)
2)
3)
4)
5)
6)
7)
No measuring instrument is necessary:
Adjusting procedures:
Turn off the SG SW mounted
on the rear of
the set.
Turn the MODE switch to CW.
After
setting
the
BAND
select
switch
to
14MHz
and the VFO to 14.175MHz, the drive
knob
must
be set to the position
of "12
o'clock"'.
Set
the
meter
change
over
switch
and
the
STAND-BY switch to ALC and SEND, respec-
tively, and rotate the DRIVE
knob to obtain
the maximum ALC output.
Adjust
T1
of
the
generator'
unit
(X52-0010-00)
from
the rear
side of the
chassis to obtain the maximum
ALC output.
Check
that no ALC
signal
is present
if the
drive knob is rotated fully clockwise.
Connect
the
RF
vacuum
tube voltmeter
(1
volt range) directly or through a capacitor of
0.01unF to the first grid of the transmitting
mixer 6CB6 (V2) in the IF unit and adjust the
variable resistor VR1
(50k) on the generator
unit so as to obtain the meter
indication
of
0.75V.
3. Adjustment of the RF meter sensitivity
(1) Purpose:
To adjust the RF meter sensitivity.
Measuring instrument:
RF
dummy
or
power
meter
(more
than
200
watts).
Adjusting procedures:
(2)
(3)
1)
Connect
the power
meter to the ANT termi-
nal.
2)
Turn on the SG SW placed at the rear of the
set.
3)
Set the mode switch to CW.
4)
Set the BAND
switch and plate knob to 14
and also the VFO to 14.175MHz.
5)
Set the meter change switch to Ip.
6)
Set the STAND-BY
switch
to SEND
and
adjust the drive knob to obtain and maximum
level of Ip.
7)
Return the STAND-BY
switch to REC and
wait for several seconds.
8)
Set again the STAND-BY
switch to SEND and
adjust quickly the plate knob to take a dip of
Ip.
9)
Reset the STAND-BY switch to REC.
10)
Set the meter change over switch to the RF
position.
11)
Set
the
STAND-BY
switch
to SEND
and
adjust the plate and the load knob alternative-
ly to obtain the maximum
output (maximum
indication) of the RF meter (check that the
output more than 150 watts).
12)
Under this condition, adjust the RF variable
resistor mounted
on the rear surface so that
the indication of RF meter will become about
400mA in Ip scale.
13)
Reset the STAND-BY switch to REC.
14)
Put the cap on the RF variable resistor.
15)
Shift the BAND select switch to 3.75MHz and
then adjust each knob to obtain the output of
more than 150 watts.
16)
In similar manner,
check
that the outputs at
7.15MHz and 21.225MHz exceed 150 watts.
17)
In the same way, ascertain that the outputs at
28.3MHz, 28.8MHz and 29.4MHz exceed 120
watts.
[Note]
© Ventilation by a fan must be complete during
transmission.
e Turning must be made quickly and complete-
ly.
® Continuous
transmission
for
more
than
10
seconds by CW is not permitted.
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