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Icom IC-7300

My menu' setup in IC-7300 for running various applications such as: HRD DM780 , MMSSTV, MMTTY (FSK), MMVARI (BPSK31), KG-STV, WSJT-X, N1MM Logger+ / Spectrum Monitor, and SIM31/63.


I’m using two cables and a Virtuel Serial Ports Emulator. One USB CI-V Cable for Rig Control (which is necessary if you wish to use RTTY FSK on/off keying and also want Rig Control at the same time) and one USB A-B Cable for digital modes.


If your software settings has RTS enabled somewhere, it will maybe send the radio into TX mode and you have to power off the radio. You may need to set USB SEND to OFF instead or find and disable RTS in the software.


In menu' setup (picture 4/4), USB Keying (RTTY) is set to

DTR for running RTTY (FSK).

Ham Radio Deluxe Troubleshooting-

ICOM Radio USB Port Data Modes

Download this guide by G1MHU, Robin.

Change FIL1 in SSB-D mode.

I have changed FIL1 from default 1.2kHz to 3.6kHz in SSB-D mode.

It provides a broader waterfall with multiple signals in DM 780 (BPSK31) and for running analog 2.4kHz SSTV etc.

See full manual, page 4-6.

My original fan in IC-7300 has been replaced with a quiet Noctua NF-A8 PWM with PWM terminals unused. I hear no noise from the fan anymore.

Yellow wire is +, black is - polarity.

Connector: 2mm JST-XH

"Spectrum Scope" Adjustment

by N9EWO Download .pdf

Purchased a new Icom radio?

Download the USB driver and unzip it before installing the driver.

Remember that the USB A / B cable must first be connected between PC and radio after the driver is installed.

Download this USB driver v.1.30

Download ICOM USB Driver- Installation Guide v.1.30


Windows Sound Device levels.

In Windows 10 "Playback devices" my level of "USB Audio CODEC" is set to 50% while USB MOD Level in the radio menu is set to 45%.

This controls power output.


In Windows 10 "Recording devices" my level of "USB Audio CODEC" is set to 50% and ACC/USB AF Output Level is set to 50% in the radio menu. This controls audio from radio to software.


Power output is always set to 100W on my

IC-7300. It's in HRD DM780 (BPSK31), SIM31 and WSJT-X programs, I'm adjusting Tx audio level to control the output power, for example to zero ALC display, when running BPSK31 and so on.

Adjust the ALC meter to 0 % of the ALC scale when running PSK31/63/125 if you want to send a clean signal (-34 IMD), with no visible unwanted sidebar pairs. This is measured with my outstanding KK7UQ IMD meter.

With radio set to 100 % RF Power, I have approx. 60W out at 0 % ALC display.

In analogue SSTV (MMSSTV) my ALC scale shows approx. 60 % at 100W output.

Setting Playback and Recording default

for PC sounds and radio IC-7300.


Right-click the white colored speaker icon located on the Windows Task Bar and select "Sounds".


Playback tab (Speaker):

Right-click on the Playback device you found, for example "Realtek High Definition Audio" and select "Set as Default Device" for PC Sounds e.g. Skype.

Playback tab (Speaker):

Right-click on the Playback device "USB Audio Codec" and select "Set as Default Communication Device" (Your IC-7300).

Recording tab (Microphone):

Right-click on the device you found for example "Realtek High Definition Audio" and select "Set as Default Device" for PC sounds e.g. Skype.

Recording tab (Microphone):

Right-click on the device "USB Audio Codec" and select "Set as Default Communication Device" (Your IC-7300).


WSJT-X settings using HRD Rig Control via

Setup pics for MMTTY RTTY (FSK).

Using One CI-V Cable and One USB Cable.

IC-7300 in use with my ACOM 1000 Amp.

The following default settings (OFF) for TX Delay in the IC-7300 menu need to be changed.

Menu>Function>TX Delay.

If you key a linear amplifier, the default key-down delay should be changed from OFF to a longer time period. OFF provides only a 6ms delay, which will hot-switch any amplifier. An amp with PIN diode T/R switching may not hot-switch at 10ms. Amps with open-frame T/R relays may require 20 or 25ms, this is a quote from Sherwood Engineering HF Test.

I run my Acom 1000 (vacuum T/R relay) at 15ms TX Delay.


See also Product Review by Mark (K1RO).

Download Product Review and see Lab Notes

Images showing my settings for N1MM Logger +, Spectrum Monitor and connection of the Digital interface in N1MM logger, for MMTTY (RTTY FSK) and MMVARI (BPSK31 / 63/125/250). For this, a Virtual Serial Port Emulator (VSPE) is used on COM5>COM10 and a USB cable.

In this setup, I also use my CI-V cable on COM3, which allows me to use my HRD Rig Control in addition to the CAT control that N1MM Logger + gives me.

USB Programming CI-V Cable (COM 3) and

USB A-B Cable for Sound Card using Icom

USB driver v. 1.30 (COM 5).

Picture # 1 is from HRD (Connect).

To run JT65 / JT9 / FT8 programs,

it is necessary to install a time

synchronization tool on the PC.

Download NetTime.

See your correct time here.

Last picture shows DM780 FSK how to.

N1MM Logger+ Configurer.

RTTY Power Level:

RTTY (FSK) shifts the RF output frequency between mark and space frequencies.

Because FSK has only frequency changes (no amplitude changes) the output does not have to be linear in order to prevent distortion like it does with PSK31 and many other modes.

On PSK31 (AFSK) I can run 30-60W out at

0 % ALC display.

In RTTY (FSK) I drive around 100 - 500W

The radio command port (TX tab in MMTTY setup) cannot be shared when using FSK keying.




SWR on my 80-6m OCF (Wndom) antenna

SWR on my 3 elm. 3 bands mini yagi

Click for larger pictures

4:1 current Balun (5kW) for my Windom ant.

Balun Design model 4115ocf Dual Core

2 x 1mm weep holes in bottoms.

Y1-5K Plus, 1:1

current Balun (5kW)

for my Mini Beam.

Collection of my 3 elm. Mini beam for 10m, 15m and 20m bands

Note: Balun is switched to Y1-5K Plus.

My Icom IC-7300 and LDG Tuner AT-1000Proll is fully controlled by HRD Rig Control.