Icom IC-21 Instructions Manual page 10

е. Again tune with the РА Tune Control (#17) for maximum reading.
f. Тепе the SWR Set Control (#14) until the "Set" position is indicated.
g. Then move the $ & SWR Meter Switch (#12) to SWR, read the SWR on the lower
scale, which gives the reflected reading of SWR.
Next move the S & SWR Meter Switch (#12) to S & RF setting.
The Mic Gain Control (#16) controls the FM deviation. |
If the Standby Switch (#2) was used, return it to the В position, or release the
PTT button of the microphone. |
К. You аге ready to transmit.
mE т
1. Shouting does not increase your communication range, but а good antenna does.
The microphone is of the dynamic type and provides good pickup for all levels of
the voice. |
HI-LOW Switch:
You can select the proper output power according to the communication distance
to be covered, or conditions. When using the IC-21(IC-21X) as a driver or exciter for
a linear amplifier the Hi-Low switch can be set to the low power position and the
power output adjusted as described in the Power Supply section. This will provide the
required amount of drive for the linear amplitier without wasting power in
swamping resistors, et cetera. When the switch is set on Hi, the power output will
be 10 Watts and on Low the output will be 1 Watt. |
18MHz x2 x2 | х2
== Crystal oscillator Buffer amplifier Phase modulator Buffer amplifier Multiplier Multiplier Multiplier
28C372 25С372 | . MV3047 25С372 28C773 25С373 ^ 256373
IDC Filter AF amplifier Power amplifier Buffer amplifier Buffer amplifier Buffer amplifier
1М60 x 2 25С371 2SK30 25С552 | 25С550 НЕ. 25С730 25С741
АМТ
© MIC г"
AF amplifier AF amplifier Fil SWR АРС т O Relay—1
25С371 25С371 Liter. detector 1N60x2 O
R О
| HI.
APC
control
DC amplifier
DC amplifier
S'DC amplifier
250235 CDC9000 25С372 dete 25С372 0х2
1st IF 10.7MHz
Filter
2nd Mixer
1st IF amplifier
1st Mixer
У
RF amplifier
RF amplifier
CFP455B
2SK19
25С371 25К19
RF Filter
2SK19 2SK19
2nd local Buffer amplifier Multiplier
oscillator 250372 25С372 25С372
2па ІҒ 455КН2 10.245МН2
apm 25К30 x 2 25С373
S & RF meter |
Regulator
ED260G
25С1013
25С373
1М709
Current limiter
25С373 1М757
Rectifier
DS10BN-L
АС117У (ог 235V)
АЕ IF RF
R OSC SOL Amp
ж-----О
Osc MIC T Relay-4
Amp
‚ Regulator
25С620
о
I Ж |
sw MIC
PTT SW