Icom Ic-78 Hf Tranciever Instruction Manual
Here you can view all the pages of manual Icom Ic-78 Hf Tranciever Instruction Manual. The Icom manuals for Communications receiver are available online for free. You can easily download all the documents as PDF.
Page 11
![Page 11
9
3INSTALLATION AND CONNECTIONS
nRequired connections
PWR
MICROPHONES (p. 45)
SM-20or SM-6,
SM-8 HM-36
GROUND (p. 8)
Use the heaviest gauge wire
or strap available and make
the connection as short as
possible.
Grounding prevents electrical
shocks, TVI and other
problems.
ANTENNA
[Example]: 1.8–30 MHz bandsDC POWER SUPPLY
PS-85
CW KEY
A straight key can be used when the
internal electronic keyer is turned
OFF in “CW PADDL” in
initial set
mode
. (p. 32)
AH-710
¥ Front panel
¥ Rear panel](http://img.usermanuals.tech/thumb/2452/82256/w300_icom_ic78-hf-tranciever_manual_d-10.png "Page 11
9
3INSTALLATION AND CONNECTIONS
nRequired connections
PWR
MICROPHONES (p. 45)
SM-20or SM-6,
SM-8 HM-36
GROUND (p. 8)
Use the heaviest gauge wire
or strap available and make
the connection as short as
possible.
Grounding prevents electrical
shocks, TVI and other
problems.
ANTENNA
[Example]: 1.8–30 MHz bandsDC POWER SUPPLY
PS-85
CW KEY
A straight key can be used when the
internal electronic keyer is turned
OFF in “CW PADDL” in
initial set
mode
. (p. 32)
AH-710
¥ Front panel
¥ Rear panel")
9
3INSTALLATION AND CONNECTIONS
nRequired connections
PWR
MICROPHONES (p. 45)
SM-20or SM-6,
SM-8 HM-36
GROUND (p. 8)
Use the heaviest gauge wire
or strap available and make
the connection as short as
possible.
Grounding prevents electrical
shocks, TVI and other
problems.
ANTENNA
[Example]: 1.8–30 MHz bandsDC POWER SUPPLY
PS-85
CW KEY
A straight key can be used when the
internal electronic keyer is turned
OFF in “CW PADDL” in
initial set
mode
. (p. 32)
AH-710
¥ Front panel
¥ Rear panel
Page 12
![Page 12
10
3INSTALLATION AND CONNECTIONS
nPower supply connections
Use an optional PS-85DC POWER SUPPLYwhen operat-
ing the IC-78 with AC power. Refer to the diagrams
below.
CAUTION:Before connecting the DC power cable,
check the following important items. Make sure:
¥ The [PWR] switch is OFF.
¥ Output voltage of the power source is 12Ð15 V
when you use a non-Icom power supply.
¥ DC power cable polarity is correct.
Red : positive +terminal
Black : negative _terminal
CONNECTING A VEHICLE BATTERY
12 V
battery...](http://img.usermanuals.tech/thumb/2452/82256/w300_icom_ic78-hf-tranciever_manual_d-11.png "Page 12
10
3INSTALLATION AND CONNECTIONS
nPower supply connections
Use an optional PS-85DC POWER SUPPLYwhen operat-
ing the IC-78 with AC power. Refer to the diagrams
below.
CAUTION:Before connecting the DC power cable,
check the following important items. Make sure:
¥ The [PWR] switch is OFF.
¥ Output voltage of the power source is 12Ð15 V
when you use a non-Icom power supply.
¥ DC power cable polarity is correct.
Red : positive +terminal
Black : negative _terminal
CONNECTING A VEHICLE BATTERY
12 V
battery...")
10 3INSTALLATION AND CONNECTIONS nPower supply connections Use an optional PS-85DC POWER SUPPLYwhen operat- ing the IC-78 with AC power. Refer to the diagrams below. CAUTION:Before connecting the DC power cable, check the following important items. Make sure: ¥ The [PWR] switch is OFF. ¥ Output voltage of the power source is 12Ð15 V when you use a non-Icom power supply. ¥ DC power cable polarity is correct. Red : positive +terminal Black : negative _terminal CONNECTING A VEHICLE BATTERY 12 V battery...
Page 13
![Page 13
3INSTALLATION AND CONNECTIONS
11
nAdvanced connections
PWRMIC
The AFSK modulation signal can be
input from [MIC]. (p. 25)
HEADPHONES
¥ Front panel
ANTENNA
Connects a linear amplifier, etc.
[REMOTE] (pgs. 41, 42)
Used for computer control and transceive operation,
and cloning operation between transceivers.
[SEND], [ALC]
Used for connecting a
non-Icom linear ampli-
fier.EXTERNAL SPEAKER (p. 44)
SP-21, etc.
ACC SOCKETS (p. 6)
AT-120,
AT-130, or
AH-4 (p. 44)
AH-2b
or long wire with
¥ Rear panel](http://img.usermanuals.tech/thumb/2452/82256/w300_icom_ic78-hf-tranciever_manual_d-12.png "Page 13
3INSTALLATION AND CONNECTIONS
11
nAdvanced connections
PWRMIC
The AFSK modulation signal can be
input from [MIC]. (p. 25)
HEADPHONES
¥ Front panel
ANTENNA
Connects a linear amplifier, etc.
[REMOTE] (pgs. 41, 42)
Used for computer control and transceive operation,
and cloning operation between transceivers.
[SEND], [ALC]
Used for connecting a
non-Icom linear ampli-
fier.EXTERNAL SPEAKER (p. 44)
SP-21, etc.
ACC SOCKETS (p. 6)
AT-120,
AT-130, or
AH-4 (p. 44)
AH-2b
or long wire with
¥ Rear panel")
3INSTALLATION AND CONNECTIONS 11 nAdvanced connections PWRMIC The AFSK modulation signal can be input from [MIC]. (p. 25) HEADPHONES ¥ Front panel ANTENNA Connects a linear amplifier, etc. [REMOTE] (pgs. 41, 42) Used for computer control and transceive operation, and cloning operation between transceivers. [SEND], [ALC] Used for connecting a non-Icom linear ampli- fier.EXTERNAL SPEAKER (p. 44) SP-21, etc. ACC SOCKETS (p. 6) AT-120, AT-130, or AH-4 (p. 44) AH-2b or long wire with ¥ Rear panel
Page 14
3INSTALLATION AND CONNECTIONS 12 nExternal antenna tuners CONNECTING AN ANTENNA TUNER (p. 44) Coaxial cable (from the tuner)Long wire or optional AH-2b Ground IC-78 AT-120/AT-130/AH-4 Control cable Ground
Page 15
4OPERATION 13 nSelecting a channel The transceiver has 99 memory channels. However, the number of channels can be restricted in initial set mode (p. 32) depending on your needs. A total of 3 ways of channel selections are available to suit your operating style. DUsing the channel selector Rotate the channel selector clockwise (channel num- ber increases) or counterclockwise (channel number decreases) to select desired channel. This is the most useful way of channel selection. DUsing up/down switches...
Page 16
![Page 16
4OPERATION
14
nFrequency indication
By pushing the [FC], channel comment indication or
frequency indication can be selected.
DTransmit frequency indication
By pushing the [TXF], transmit frequency is indicated,
regardless channel comment or frequency indication.
While transmit frequency is indicated, Ò Ó ßashes.
nLock function
The lock function electronically locks the main dial to
prevent accidental channel changing.
Push [LOCK] to turn the lock function ON and OFF.
Before channel selection, turn this...](http://img.usermanuals.tech/thumb/2452/82256/w300_icom_ic78-hf-tranciever_manual_d-15.png "Page 16
4OPERATION
14
nFrequency indication
By pushing the [FC], channel comment indication or
frequency indication can be selected.
DTransmit frequency indication
By pushing the [TXF], transmit frequency is indicated,
regardless channel comment or frequency indication.
While transmit frequency is indicated, Ò Ó ßashes.
nLock function
The lock function electronically locks the main dial to
prevent accidental channel changing.
Push [LOCK] to turn the lock function ON and OFF.
Before channel selection, turn this...")
4OPERATION 14 nFrequency indication By pushing the [FC], channel comment indication or frequency indication can be selected. DTransmit frequency indication By pushing the [TXF], transmit frequency is indicated, regardless channel comment or frequency indication. While transmit frequency is indicated, Ò Ó ßashes. nLock function The lock function electronically locks the main dial to prevent accidental channel changing. Push [LOCK] to turn the lock function ON and OFF. Before channel selection, turn this...
Page 17
![Page 17
15
4OPERATION
nMode selection
The [RF/SQL] control adjusts either the RF gain or
the squelch. The action depends on the operating
mode and the condition of the RF/SQL item in
initial
set mode
(p. 31).
¥ [RF/SQL] control priority
* The RF gain is set to maximum level when the [RF/SQL]
is set as [SQL] control.
The RF gainis used to adjust the receiver gain.
¥ Shallow rotation moves the S-meter to the right indicating
the signal strength which can be received.
The recommended position for RF gain is the...](http://img.usermanuals.tech/thumb/2452/82256/w300_icom_ic78-hf-tranciever_manual_d-16.png "Page 17
15
4OPERATION
nMode selection
The [RF/SQL] control adjusts either the RF gain or
the squelch. The action depends on the operating
mode and the condition of the RF/SQL item in
initial
set mode
(p. 31).
¥ [RF/SQL] control priority
* The RF gain is set to maximum level when the [RF/SQL]
is set as [SQL] control.
The RF gainis used to adjust the receiver gain.
¥ Shallow rotation moves the S-meter to the right indicating
the signal strength which can be received.
The recommended position for RF gain is the...")
15 4OPERATION nMode selection The [RF/SQL] control adjusts either the RF gain or the squelch. The action depends on the operating mode and the condition of the RF/SQL item in initial set mode (p. 31). ¥ [RF/SQL] control priority * The RF gain is set to maximum level when the [RF/SQL] is set as [SQL] control. The RF gainis used to adjust the receiver gain. ¥ Shallow rotation moves the S-meter to the right indicating the signal strength which can be received. The recommended position for RF gain is the...
Page 18
![Page 18
16
4OPERATION
•Meter function
The bar meter in the function display acts as an S-
meter (for relative signal strength) during receive and
can be selected for one of three functions during
transmit.
¥ Push [SET] to select the PO, ALC and SWR meter
mode.
¥ Measuring SWR
qConÞrm that the output power is over 30 W.
wPush [SET] to select the SWR meter.
ePush [MODE] to select CW or RTTY operation.
¥ Key down or push [PTT] to transmit; then read the ac-
tual SWR from the meter:
²1.5; well matched antenna
³1.5;...](http://img.usermanuals.tech/thumb/2452/82256/w300_icom_ic78-hf-tranciever_manual_d-17.png "Page 18
16
4OPERATION
•Meter function
The bar meter in the function display acts as an S-
meter (for relative signal strength) during receive and
can be selected for one of three functions during
transmit.
¥ Push [SET] to select the PO, ALC and SWR meter
mode.
¥ Measuring SWR
qConÞrm that the output power is over 30 W.
wPush [SET] to select the SWR meter.
ePush [MODE] to select CW or RTTY operation.
¥ Key down or push [PTT] to transmit; then read the ac-
tual SWR from the meter:
²1.5; well matched antenna
³1.5;...")
16 4OPERATION •Meter function The bar meter in the function display acts as an S- meter (for relative signal strength) during receive and can be selected for one of three functions during transmit. ¥ Push [SET] to select the PO, ALC and SWR meter mode. ¥ Measuring SWR qConÞrm that the output power is over 30 W. wPush [SET] to select the SWR meter. ePush [MODE] to select CW or RTTY operation. ¥ Key down or push [PTT] to transmit; then read the ac- tual SWR from the meter: ²1.5; well matched antenna ³1.5;...
Page 19
![Page 19
17
4OPERATION
•Microphone compressor
IC-78 has a built-in, low distortion Mic compressor
circuit. This circuit increases your average talk power
in SSB mode and is especially useful when the re-
ceiving station is having difÞculty copying your signal.
qSelect USB or LSB mode.
wPush [COMP] switch to turn mic compressor ON.
¥ ÒCOMÓ indicator appears.
eConÞrm the ALC level.
¥ Push [SET] to select the ALC meter.
¥ Speak into the microphone at a normal voice level.
¥ If the ALC meter peak past the ALC zone,...](http://img.usermanuals.tech/thumb/2452/82256/w300_icom_ic78-hf-tranciever_manual_d-18.png "Page 19
17
4OPERATION
•Microphone compressor
IC-78 has a built-in, low distortion Mic compressor
circuit. This circuit increases your average talk power
in SSB mode and is especially useful when the re-
ceiving station is having difÞculty copying your signal.
qSelect USB or LSB mode.
wPush [COMP] switch to turn mic compressor ON.
¥ ÒCOMÓ indicator appears.
eConÞrm the ALC level.
¥ Push [SET] to select the ALC meter.
¥ Speak into the microphone at a normal voice level.
¥ If the ALC meter peak past the ALC zone,...")
17 4OPERATION •Microphone compressor IC-78 has a built-in, low distortion Mic compressor circuit. This circuit increases your average talk power in SSB mode and is especially useful when the re- ceiving station is having difÞculty copying your signal. qSelect USB or LSB mode. wPush [COMP] switch to turn mic compressor ON. ¥ ÒCOMÓ indicator appears. eConÞrm the ALC level. ¥ Push [SET] to select the ALC meter. ¥ Speak into the microphone at a normal voice level. ¥ If the ALC meter peak past the ALC zone,...
Page 20
18 4OPERATION The AT-120, AT-130 or AH-4 matches the IC-78 to a long wire antenna more than 7 m (23 ft)long (3.5 MHz and above). ¥ See p. 11 for connection. ¥ See the connected antenna tunerÕs instruction man- ual for installation and antenna connection details. ¥ Setting example: NEVERoperate the AT-120, AT-130 or AH-4 without an antenna wire. The tuner and transceiver will be damaged. NEVERoperate the AT-120, AT-130 or AH-4 when it is ungrounded. Transmitting before tuning may damage the trans-...