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PLATE AND LOAD TUNING
CAUTION: When the MODE switch is in the CW
positlon
tile final tubes draw full plate current in transm#t. Final tube
life
is
directly related to the length of tune-up periods. Do
not transmit with the tubes out of resonance for more than
10 seconds at
a
tlme.
Turn the MODE switch to CW, turn the METER switch to RF.
and set the
stand~by switch to the SEND position. Quickly
adjust the PLATE control and then the LOAD control
alter^
nately to peak (maximum meter deflection] the power out-
put.
If necessary, adjust the RF VOLTcontrol on the rear
pa^
nel to bring the output reading to about a 2/3 scale reading.
NOTE
1
:
The ALC meter is less deflected at the ON posi-
tion
of the SG switch or at the CW position of the MODE
sw~tch than at the OFF position or the TUN position of these
switches.
This indicates the normal state of RF NFB. The
MIC knob and the CAR knob should be properly adjusted
un-
der normal transmit condftions.
NOTE
2:
Transmission is not effected at the WWV or AUX
positton of the BAND switch. If the transceiver is left
in
the
transmit mode over
a
few minutes. the driver tube 12BY7A
of the final stage may be damaged.
4.12
SSB
OPERATION
Tune the TS-820 as described in Sections
4
1 to 4.1
1
Set
the MODE switch to USE or LS8 and connect a microphone
to the MIC connector.
NOTE
lnternatlonal amateur practlce dictates uslng USB
or LSB on the
follow~ng bands
Key the
transm~tter and speak into the microphone with the
tone of
vojce used in normal operation Adjust the MIC con-
trol
unt~l voice peaks are just within the top limit of the ALC
range printed on
the meter scale. The METER switch 1s in
the ALC position If the
transmitter
section is driven beyond
this range, the
transm~tted signal will be distorted.
---
21.0
MHz
Band
--
USE
PTT OPERATION
28.0
MHz
Band
By connecting the microphone equipped with PTT switch.
the transceiver
is
readily used for PTT operation. For com-
munication. depress
PTT switch with STANDBY switch left
in the REC position.
USE
VOX OPERATION
Adlilsl tho transceiver as described in the previous para-
graph. Flip the VOX switch
onand close-talk into the micro-
phone,
increasing
the VOX GAlN control until the VOX relay
just operates. For VOX operation it is desirable to close-talk
the microphone to prevent background noises from tripping
the
TS-820 mto transmission.
Check that the ALC reading for voice peaks is still within the
ALC range on the meter,
If necessary. adjust the MIC con-
trol for a proper ALC reading.
I1 the VOX clicu~t
is
acttvated by speaker nolse. adjust the
ANTI-VOX control Increase the control as necessary for
proper VOX operatlon
Do not use more VOX GAlN or more
ANTI VOX gain than
necessary
to control VOX operation. If the VOX circuit
transfers between words, or holds too long. adjust the re-
lease time constant by turning the DELAY control.
4.13
CW
OPERATION
Tune and load the TS-820 as described in Sections 4.1
through 4.1 1. Connect a key to the back panel CW KEY
jack, set the MODE switch to CW. and set the stand-by
switch to SEND for transmitting.
CW
transmlsslons are
automatically
monitored
through the
speaker of the
transceiver
The aud~o galn of the sldetone
can be adjusted w~th VR3 on the AF board
For semi-break-in operation. turn the VOX switch on. Hold
the key down and increase the VOX GAlN control. until the
VOX relay just operates.
It is desired to change the release
ttlne constant of the VOX circuit. adjust the DELAY control.
The plate current for CW
operatlon should be about 200
ma Use the CAR control to adjust the
carrler level for CW
opcratlon At 200 ma of IP there may be no ALC read~ng
OPERATION WITHOUT CW FILTER
Set the IF SHIFT knob to its center position and the RIT
switch to the OFF position to receive CW signal. Turn the
maln tuning knob for about 800 Hz of beat signal and your
tiansmlt frequency will be set to the transmit frequency of
the opposite station (zeroing). During reception. the side
tone
monltor is activated by pressing down the key. In this
case, listen to the side tone signal and the receive signal and
adlust the maln tuning knob so that the cycle of the sound is
increased. By so doing. the zeroing of frequencies can be
achieved. After
zeroing. set the RIT swltch to ON and turn
the
RIT knob for the pitch that suits your listening taste.