[Elecraft] Kat500

[KJ7SOY]

It’s possible to lock out antenna ports with the KAT500 utility so you can’t change to them so that they can’t be transmitted to when there’s no antenna connected. I suspect they’ve been excluded in this fashion. They can be reset in the utility to open them up. 

73, Adrian 
K7RJS


> On Jun 21, 2025, at 9:07 AM, Eckhart via Elecraft <elecraft at mailman.qth.net> wrote:
> 
> Hello
> 
> I aquired a used KAT500 for use with ma K3S/KPA500.
> Even after a software update the tuner will not allow a changing of the antenna. It stays on ant1.
> The same, when operating from the utility.
> Any ideas what this may be?
> 
> Eckhart Neumann
> DK2LJ
> 
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to kj7soy at gmail.com