Kenwood TS-830S Instruction Manual page 4

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1.1 KENWOOD TS-830S
The TS-830S is a highly sophisticated solid state Amateur
band transceiver employing only three vacuum tubes.
Operating on all Amateur bands between 1.8 and 29.7 MHz,
this unit is constructed modularly. The TS-830S includes
many built-in features usually found as extras on other
transceivers. Included are VOX, 25 kHz calibrator, RIT, RF
attenuator, and an effective noise blanker. The TS-830S
also includes automatic gain control (AGC), automatic level
control (ALC), semi-break-in CW with sidetone, a speech
processor, speaker and built-in AC power supply.
Designed for operation on SSB or CW, the TS-830S delivers
more than 220 watts PEP input.
Any complicated electronic device will be damaged if
operated incorrectly, and this transceiver is no exception.
Please read all of the operating instructions before putting
your TS-830S on the air.
1.2 FEATURES
1. Interference-free DX operation
* Variable bandwidth IF filter circuit (VBT)
The built-in VBT (Variable Bandwidth Tuning) circuit al-
lows IF filter pass-bandwidth to be varied as you wish to
eliminate unpleasant interference. It is adjustable
independent of the IF Shift.
*IF shift circuit
The IF SHIFT (also called pass-band tuning) is a circuit
to shift IF pass-bandwidth without changing receive
frequency. It eliminates interference or adjusts receive
frequency characteristic as desired.
* High reliability 455 kHz notch circuit
Interference, is also eliminated by the built-in notch
circuit. The TS-830S uses 455 kHz notch-frequency.
The notch circuit shifts the BFO frequency and the
local mixer frequency at the same time, thereby equiva-
lently changing the notch frequency. Thus, accurate
notch characteristic is realized even when the notch
point is changed, completely eliminating nearby inter-
ference signals.
* NARROW/WIDE BANDWIDTH selection and optional
filters for enhanced CW operation:
NARROW or WIDE CW operation can be selected when
using the following optional filters:
YK-88C (500 Hz), YK-88CN (270 Hz),
YG-455C (500 Hz), YG-455CN (250 Hz)
*Variable tone control circuit.
2. WARC bands
The TS-830S fully covers 160-10 m Amateur bands,
including the new WARC bands of 10, 18 and 24.5
MHz.
The TS-830S VFO covers more than 50 kHz above and
below each 500 kHz band. The optional VFO-230
external digital VFO covers about 100 kHz above and
below each band, for MARS and other applications.
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INTRODUCTION AND FEATURES i
3. Self-contained, compact AC Power supply.
4. Advanced circuit design for imporved two-signal char-
acteristics. Cleverly designed front-end circuit compo-
nents and receive circuit system assure excellent
two-signal characteristics. Cross-modulation and
blocking are reduced.
5. TX final unit uses 6146B's
The finals are a pair of 6146B transmitting tubes. RF
negative feed back and amplified ALC provide clear,
strong signals with reduced cross modulation.
6. Variable level noise blanker
Conventional fixed level noise blankers are sometimes
less than effective in removing pulsating noise over
weak signals or rejecting strong interference signals.
This variable level noise blanker is equipped to control
the optimum threshold level of the gate pulse amplifier.
7. RF speech processor to increase average power during
SSB operation
This is an RF clipper speech processor, using both the
455 kHz and 8.83 MHz IF's. Unwanted frequency
components are removed by the 8.83 MHz crystal filter,
providing a compression ratio of approximately 20 dB.
8. Transmit monitor circuit
The built-in monitor circuit permits easy adjustment of
the RF processor and mic gain.
9. XIT (Transmit Incremental Tuning) for fine adjustment
of transmit frequency independent of receive frequency.
10. A combination of precise, easy-to-read digital frequency
indicator and an analog dial.
The digital indicator has a Digital Hold memory
function.
11. The controls are arranged on the die-cast front panel for
easy operation.
12. A full variety of accessory circuits are provided:
The TS-830S includes:
VOX circuit (available for Semi-Break-in), Market circuit,
side-tone oscillator, selectable AGC (OFF, FAST,
SLOW), RF ATTENUATOR, Fixed crystal oscillator
circuit, Audio frequency characteristics selector circuit
for each mode, CW zero-beat circuit, IF OUT-1 (for
BS-8 Pan Display) and OUT-2 (for RX Display) for
SM-220 Station Monitor, HEATER switch, Screen Grid
switch, and a Built-in speaker.