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IC-737 /A

ICOM
IC-737 /A

Specifications

Prices

The IC-737 is an all-mode HF transceiver with 100 Watt RF output. Features: Built-in automatic antenna tuner, 0.5 MHz to 30 MHz general coverage receiver, PBT and Notch filter, RIT and XIT, full and semi break-in for CW operations, direct keypad entry, 101 memories, 10 memo pad, double band stacking register (like 2 VFO's in each band). The Icom IC-737A is very similar to the IC-737, but adds VOX function. Ideated in Japan, year of introduction 1993.

Reference market : amateur-radio

IC-737 /A specifications

General

Frequency coverage
Receive	0.5000 ~ 29.9950 MHz
Transmit	1.8000 ~ 1.9999 MHz 3.5000 ~ 4.0000 MHz 7.0000 ~ 7.3000 MHz 10.1000 ~ 10.1500 MHz 14.0000 ~ 14.3500 MHz 18.0680 ~ 18.1680 MHz 21.0000 ~ 21.4500 MHz 24.8900 ~ 24.9900 MHz 28.0000 ~ 28.7000 MHz
Mode
CW / LSB / USB / AM / FM
Tuning step
10 / 20 / 50 Hz 1~10 kHz (programmable) 0.001~1 MHz (programmable)

Receiver

Sensitivity
CW / SSB	<0.16 uV (1.8~30 MHz, 10dB S/N, pre ON)
AM	<13.0 uV (0.5~1.8 MHz, 10dB S/N) <2.0 uV (1.8~30 MHz, 10dB S/N, pre ON)
FM	<0.5 uV (28~29.7 MHz, 12 dB SINAD, pre ON)
Selectivity
CW-N [1]	250 Hz (-6dB)
CW-N [2]	500 Hz (-6dB)
CW / SSB	>2.1 KHz (-6dB) <4.0 KHz (-60dB)
AM	>6.0 KHz (-6dB) <20.0 KHz (-40dB)
FM	>12.0 KHz (-6dB) <30.0 KHz (-50dB)
RF preamplifier
Yes
RF attenuator
20 dB
Spurious and image rejection
>70 dB
PBT (Passband Tuning)
Yes
Notch filter
Manual	~20 dB
NB (Noise Blanker)
Yes
RIT (Receiver Incremental Tuning)
±2.5 kHz
AGC (Automatic Gain Control)
Fast, slow
Frequency stability
±200 Hz from 1' to 60' after power on. ±30 Hz/hr with temperature +25°C after 60' power on. ±350 Hz with temperature from 0°C to +50°C. ±0.5 ppm with temperature from -30°C to +60°C [3]
IF (Intermediate Frequency)
1°	69.0100 MHz (AM / FM) 69.0106 MHz (CW) 69.0115 MHz (SSB)
2°	9.0100 MHz (AM / FM) 9.0106 MHz (CW) 9.0115 MHz (SSB)
3°	455 kHz
Squelch sensitivity
SSB	<5.6 uV (threshold, pre ON)
FM	<0.3 uV (threshold, pre ON)

Transmitter

Output power
CW / SSB / FM	10 ~ 100 W
AM	10 ~ 40 W
Spurious emission
<-50 dBc
Carrier suppression (SSB)
>40 dB
Unwanted sideband suppression (SSB)
>50 dB
Microphone
600Ω
XIT (Transmitter Incremental Tuning)
±2.5 kHz
CW features
Full / Semi break-in 7~41 wpm Keyer
Antenna tuner
Impedance range	16.7 ~ 150Ω
Minimum operating power	8 W
Tuning accuracy	<1.5:1
Insertion loss	<1 dB

Features

Memory
89 regular memories 10 split memories 2 for scan edge 10 memo pads
Display
10 Hz frequency resolution
Selective calling
CTCSS [4]
Antenna
2 x SO239 50Ω
Power supply
13.8 VDC (±15%)
Power consumption
1.6A RX (squelched) 2.1A RX (max audio) 20A TX (max RF power)
Audio power
2.6W on 8Ω
Audio output
Jack 6.35 mm (headphone) Jack 3.5 mm (4~16Ω external speaker)
Connections
Jack 8-pin (mic) Jack 3.5 mm (CI-V / PC) Jack 6.35 mm (CW key) RCA (SEND) RCA (ALC) 4-pin socket (AH-3 antenna tuner) 7-pin DIN (ACC2) 8-pin DIN (ACC1)

Mechanical and environmental data

Operating temperature
from -10°C to +60°C
Dimensions
330 (W) x 111 (H) x 285 (D) mm, projections not included
Weight
8.05 kg (IC-737) 8.10 kg (IC-737A)

With optional FL-101 (IF 9 MHz) or FL-53A (IF 455 kHz) filter.
With optional FL-100 (IF 9 MHz) or FL-52A (IF 455 kHz) filter.
With optional CR-282 high-stability crystal unit.
With optional UT-30 programmable tone encoder unit.

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IC-737 /A side tone preset :

CW side tone output can be controlled by RF-GAIN. If you want to change the basic CW side tone level, perform the procedure described below.

ICOM IC-737 side tone preset

Remove the top and bottom covers. Adjust R238 as shown in the diagram. Replace the top and bottom covers.

IC-737 /A RIT and XIT adjustment :

When the RIT/XIT (Receive/Transmit Incremental Tuning) control center position is shifted (>±0 Hz) it can be adjusted with an internal variable resistor.

ICOM IC-737 RIT and XIT adjustment

Remove the top and bottom covers. Set the RIT/XIT control to the center. Push [RIT] to turn the RIT function On. Adjust R19 on the logic unit, as shown in the figure, to set the displayed RIT frequency to "0.00". Replace the top and bottom covers.

IC-737 /A price

We have collected for your convenience the ICOM IC737 sale price (UK Pounds) and its trend over time. Useful to guarantee a cheaper purchase of this radio and to put it for sale in the second-hand market. Of course offers, accessories, warranty terms and conditions can lead to different figures.

Price	Date	Condition
GBP 270.00 (315EUR)	2022-jun	Second Hand IC-737 version. In excellent condition
GBP 260.00 (349USD)	2018-aug	Second Hand IC-737 version. Comes with HM-12 mic, never used, and DC cord

IC-737 /A review

Deenah Rae

25 December 2023

This is a great radio !!
Very easy to use, sounds great, and I love the classic look!
Found mine in mint / new condition and I was happy to pay 400 USD for it in 2023.
If you don't like all that digital stuff like me, then this is the one for you. I can easily keep up with the IC-7300 guys and over power them with this rig.

[End post]

Mark WB8YMV

17 September 2023

Its an ok rig in general. I would say it makes a good backup rig - especially at the price I got it for ($300) but I wouldn't want it as my main rig. This is (ICOM IC-737) the first radio I've ever owned that didn't have an RF gain control which kind of bugged me when I first noticed it but I guess I can get by with the attenuator (two level) and the preamp on/off buttons. If you get one of these make sure it has the TCXO installed otherwise it takes about 20 minutes or so to quit drifting. Also I found the noise blanker to be quite ineffective - not happy with that at all. I do like the fact that there is a button for each mode and band so they don't make you go through a step up/down menu to change modes or bands. It has up/down MHz buttons so that is kind of nice. It has a cool little feature it has where there is a small bunch of memory locations where you can save favorite frequencies. By pressing another button you can scroll through all your saved favorites.

It has a nice meter instead of just a "segment-ometer" like the newer rigs. I do like it for shortwave listening but I wish the AM mode had a wide setting to get better sound when listining to broadcasts. In all I would say that if you're a new ham looking for a first rig and you run across one of these, you should definitely consider getting it.

[End post]

IK4CPX

18 july 2022

My rig every now and then gets up by 50 Hz in reception, out of phase with the transmission, then when it wants to go back to isoonda.

[End post]

Rand

1 july 2022

Absolutely a great radio. After two weeks I just fell in love.

[End post]

Randy

18 june 2022

Great rig!

[End post]

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