Kenwood TS-820S Instruction Manual page 27
Ssb transceiver
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Also See for TS-820S:
- Service manual (82 pages) ,
- Instruction manual (47 pages) ,
- Operating manual (46 pages)
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nitor circuit.
Crystal filters are self contained for SSB operation.
CW fil-
ters (YG-88C) are available as optional accessories. for easy
installation.
COIL PACK
BOARD
(X44-1140-00)
Tuning coils for the individual bands and stages, band select
rotary switch and variable capacitor are all arranged ratio-
nally in one unit. These parts function together with the RF
Board.
RF BOARD
(X44-1150-00)
VFO UNIT
(X40-1110-00)
The PLL circuit is controlled
by VFO signals. thus the fre-
quency stability ofTS-820S
is virtually determined by the sta-
bility of VFO. The unit is composed of 2 FETs. 2 transistors
and 3 diodes.
Its oscillation
frequency
is set to 5.0 -
5.5 MHz.
The RF Board
holds
the ALC amplifier
circuit
and the block
bias circuit
as well
as the RF amplifier
and mixer
circuit
for
transmission
and reception.
It also includes
a coil pack
unit for the
tuning
circuit.
Fig. 14 Coil Pack Board
Fig. 15 VFO Unit
27
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