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nitor circuit.
COIL PACK BOARD 1x44-1140-00)
Crystal filters are self contained for SSB operatlon. CW fil-
Tuning coils for the individual bands and stages. band select
ters
(YG-88Cl are available as optional accessories. for easy
rotary switch and variable capacitor are all arranged
ratio-
installation.
nally in one unit. These parts function together wlth the RF
RF BOARD
1x44-1150-00)
Board,
The RF Board holds the ALC
ampl~f~er circuit and the block VFO BOARD 1x40-1110-00)
bias circuit as well as the RF amplifier and mixer circuit for
The PLL
circuit is controlled by VFO signals, thus the fre-
transmission and reception.
quency
stabil~ty of TS-820 is virtually determined by the sta-
It also includes a coil pack unit for the tuning circuit.
btlity 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.
Fig. 13 RF Board
COIL P&CC
,mad-l,lO.OO,
Fig. 14 Coil Pack Board
Fig. 15 VFO Board