I see what they are saying and they build the things so they certainly know best on how they should be configured.  My only concern is, like you, if you switch from USB-D to USB and don’t change the max power you could blow some expensive tubes/FETs in your PA.  The solution to this would be the ability to set the max power independently for each mode but the 7300 doesn’t do that.  You can’t even set the max power independently for each band.  One of the short comings for that radio for sure along with the single antenna port.  Still a great rig though.

73
Jim, W4KXY

Sent from my iPad

On Sep 12, 2018, at 10:13 AM, John Kludt <johnnykludt@gmail.com> wrote:

All,

Everyone seems to have different idea as to the proper mixture of ALC and drive power when using the IC-7300.  The attached document is from Icom and describes the correct setup for the IC-7300 and other Icom radios.  The key takeaways are:
  1. No ALC
  2. Power on the radio at 100%
  3. Adjust output power with the power slider on the right in WSJT-X
As I think this through, using this method will require some care when switching from a digital mode to SSB/CW if a amplifier is being used.  When in a digital mode the drive to the amplifier is set using the using the power slider on WSJT-X.  No problem.  But if I now switch to SSB the PA will see the full 100 watts of drive. Probably not a good thing!  So the process to switch from digital to SSB now becomes;
  1. Cut the drive power back to a safe level (20-30 watts with the Beko for example)
  2. Switch to SSB on the 7300
  3. Check PA power out and adjust if needed
  4. Have a nice day 
Note in their discussion the relationship between ALC and power out of the radio.  

Johnny K4SQC
<Configuring Digital Mode for Radios with USB.pdf>
_______________________________________________
Fourlanders mailing list
Fourlanders@contesting.com
http://lists.contesting.com/mailman/listinfo/fourlanders
Sent to: wa4kxy@bellsouth.net