[Elecraft] USB/3.5mm Extension?

[Jack Brindle]

So that everyone reading understands, the KAT500 IS RS-232/IEEE-232 compatible in its voltage levels. It is NOT TTL (0,5v) compatible.

73, Jack, W6FB


Sent from my iPhone

> On Nov 28, 2023, at 10:14 AM, Andy Durbin <a.durbin at msn.com> wrote:
> 
> 
> "Indeed, it is NOT true that the KAT500 uses TTL signal levels for the serial port. "
> 
> Ah, but I said "Isn't it true that the KAT500 USB cable uses RS-232 protocol but TTL signal levels? "   Perhaps I should have been more specific.  My recollection is that the USB/Serial cable transmits a TTL signal.  I have no way to know the receiver characteristics of that interface dongle.  I did study the KAT500 I/O schematic to understand that end of the connection.
> 
> Anyway, not posting to "keep you on your toes".  I was confused by this interface when I first decided to work with it so didn't want people to assume it was RS-232 compliant.
> 
> 73,
> Andy, k3wyc
> 
>