The 7300 has a USB B 2.0 FemaleYou also have to supply power to it from the 
cable.So that's why a hub in the middle is necessary.And the optical has USB B 
3.0 Male along with the hub having USB B 3.0 Female and the hub supplies power 
as the optical doesn't pass power lines.
Mike W9MDB 

    On Saturday, January 25, 2025 at 10:47:51 PM CST, Enrico OE1EQW 
<oe1...@oevsv.at> wrote:  
 
  
Maybe this item can help you:
 
Amazon ASIN B0D3FYJ4MM
 
73
 
Enrico OE1EQW
 
 Am 25.01.2025 um 22:19 schrieb Black Michael via wsjt-devel:
  
 
  In my current setup there is an IC-7300 that has been unable to transmit even 
1W without dropping the USB connection.  I have numerous rigs hooked up and 
lots of USB connections.  The 7300 is well known for being RFI sensitive 
dropping CAT and Audio service. 
  So I bought an optical USB cable, plugged it into a non-powered Startech hub, 
then ran a triplite cable to the rig.  Now able to run full power without any 
problems. I'll be doing more investigation with a cheaper hub and adding more 
USB devices to this new hub.  But the optical cable has a USB-B on one end and 
USB-A on the other.   So do need a USB hub that takes a USB-B cable. 
  Not a cheap solution but effective. 
  https://www.amazon.com/dp/B01N94D03E 
https://www.amazon.com/StarTech-com-Mountable-Rugged-Industrial-Port/dp/B003AVPUZG/ref=sr_1_8?s=electronics&sr=1-8
 
  Mike W9MDB 
   
     
  
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