CONTROLS AND SWITCHES
The transceiver has been specifically designed for ease
of operation and versatil ity. A l l controls have been
preset at the factory. Several of the controls are
unusual in operation. and im proper adjustment may
result in signals of poor q uality. The various front
( 1) VFO Select Sw itch ;
This sw itch prov ides selection of the com pan ion
FV-lOlB
external VFO or two fixed crystal oscillator positions.
Normal operation of the transceiver V FO req uires that
the sw itch be placed in the .. INT " position .
INT--
FT-101E/277E VFO controls both trans
mitter and receiver frequencies.
RX EXT--FV-10lB/277B EXTERNAL VFO controls the
receiver frequency and the FT-101E/277E
VFO controls transmitter output frequency.
TX EXT--FV-101B/ 2 7 7 B EXTERNAL V FO controls the
transmitter output frequency and the FT-1 OlE/
277EVFO controls the receiver frequency.
EXT--
FV-10lB/ 2 7 7 B EXTERNAL VFO control s
both transm itter and receiver frequencies.
CHl, CH2 --Provides crystal control of the transceiver.
Proper crystals must be installed on
PB
1534
crystal oscillator board. for crystal controlled
operation.
(2) MODE Switch; (LSB-USB-TUNE-CW-AM)
The MODE switch is a five-position switch. This
switch is used to select the mode of operation;
LSB, USB, AM, CW, or TUNE position. In the
AM, CW and TUNE position, a separate crystal is
used to shift the carrier frequency into the filter
passband .
( 3) RF GAIN/ AF GAIN ;
The RF GAIN and A F GAIN controls are mounted
panel controls and their fu nctions arc descri bed in the
fol lowing section. Be certain that y ou . u n derstand
thorough ly the function of each control before operating
the tran sccinT.
on concentric shafts. RF G A I N control ( lever control )
varies the gain of the receiver R F and I F ampli fier.
Maximum sensitivity is obtained w ith the control set
at 10 ( fully clockwise ) .
The A F GAIN control ( round knob ) adj u sts the audio
output level at the speaker and phon e j ack. Clockwise
rotation increases the audio output.
(
4 ) Tuning Knob
The tuning knob located d irectly below the main dial
window in com bination with the band sw itch determ ines
the actual freq uency of operation.
The VFO drive mechan ism consists of a precision
spring loaded split gear sy stem in com bination w ith
a planetary drive unit to prov ide zero backlash at low
tun ing rates. Each revol ution of the tuning knob results
in a frequency change of
16
KHz as indic ated on the
skirt surrounding the tuning knob.
( 5) BAND Switch ;
The band switch is an eleven-position switch used to
select the desired band for receiv i ng or transmitting.
The band indication is color coded to guide the opera
tor selecting in the proper frequency scale for each band.
(6)
(7) CLARIF IER;
The clarifier control provides a means for tuning
the receiver frequency
3 KHz
to either side of
the transmitting frequency. Th us, it is possible to
set the pitch of the voice you are receiving to the
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