Equipment information

Icom IC-22S Transceiver
Manufacturer
Icom
Model IC-22S
Date
Category: Radio, Communication
Group Transceiver
Description PLL Synthesized 2-Meter Transceiver
Information
                                    This transceiver is extremely rugged and completely solid
state. State of the art devices such as Integrated Circuits,
Field Effect Transistors, Varactor and Zener diodes are
engineered into a tight-knit straightforward electronic
design throughout both transmitter and receiver.
Reliability, low current demand, unexcelled performance and
ease of operation are the net result.

The dual conversion receiver with its FET front end and
high-Q helicalized cavity resonators boasts low noise and
sensitivity of 0.4 V or less. Signal gain of 90-db or more
is accomplished from the second mixer back by virtue of a
6-stage IF amplifier. The need for additional front end RF
amplification is thus eliminated. Zener-regulated PLL
controlled first and crystal-controlled second local
oscillators produce very good stability. Audio reproduction
is of an unusually high order of distortion free clarity.

The transmitter section will produce a minimum of 10 watts
RF output. Again, a phase locked loop is employed for
initial frequency stability. Twenty two (22) channels are
provided for operating convenience and versatility. High-Q
stages provide minimum interstage spurious response. A low
pass filter is placed at the output to further insure
undesirable frequency products not being emitted. Final PA
transistor protection circuit is incorporated

in the final circuitry. A new design heat radiator is
employed to increase final amplifier reliability.

All circuitry is constructed on three printed circuit boards
which are easily accessible for servicing. The printed
circuit boards are housed in a sturdy frame which is, in
turn, housed in a rigid metal case providing an extremely
durable and rugged unit. Care has been taken to filter and
regulate internal DC voltages. A DC input filter is provided
to eliminate alternator or generator “whine” generated in
the vehicle environment. Test points are brought up from all
major circuits to facilitate maintenence checks and trouble
shooting should the necessity arise.

Each unit comes complete with built-in speaker, a high
quality dynamic microphone, mobile mounting bracket,
microphone clip, DC cabling and plug, external speaker plug,
and operating manual. A modern styled face plate, large S
meter, small size and low profile design complete the unit’s
styling. A welcome addition to a dashboard or fixed station.

These manuals are available for the above equipment:

Icom -- IC-22S -- Service and User Manual
File name Icom-5396-Manual-Page-1-Picture
Manual Type Service and User Manual
Pages 31
Size 5.23 Mbytes (5485675 Bytes)
Language english
Revision
Manual-ID/Number
Date
Quality Scanned document, all readable.
Upload date
MD5 fff37befcc102605b1e6a7e2fa99bfd6
Downloads 324 since 25 January 2014
Information
I	SPECIFICATIONS.................................... 1

II	DESCRIPTION....................................... 2

ill	INSTALLATION..................................... 3

IV	CONTROL FUNCTIONS............................... 7

V	OPERATION........................................ 8

VI	THEORY OF OPERATION............................. 9

VII	PARTS LIST......................................... 17

VIII	VOLTAGE CHARTS ................................ • 21

IX BLOCK DIAGRAM..................................... 27
Icom-5396-Manual-Page-1-Picture
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Topic: Icom IC-22S
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Owen
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Mar 2017
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Owen says...
where is the schematic of this radio

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