IC-7300 in use with my ACOM  1000
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
 
 
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.
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Icom IC-7300
"Spectrum Scope" Adjustment by N9EWO        (Click for download).
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.
The default settings of the SSB-D mode
(FIL1 ~ FIL3) are changed with the new firmware ver.  1.30,  it's now:
FIL 1 (3.0 kHz) FIL 2 (1.2 kHz) FIL 3 (500 Hz)
My menu' setup in IC-7300 for running various pplications such as: HRD DM780 ,  MMSSTV,  MMTTY (FSK), MMVARI (BPSK31), KG-STV,  WSJT-X, N1MM Logger+ / Spectrum Monitor, and SIM31/63.

Iím 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).
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
Ham Radio Deluxe Troubleshooting-
ICOM Radio USB Port Data Modes
Download this guide  by G1MHU, Robin.
See HRD IC-7300 USB Setup guide
See G3NRW IC-7300 resources Page
= Klik for dansk
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

Download:
Latest firmware Updates 1.30

IC-7300 Service manual.
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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.
 
 
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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).
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.