USB-Serial converter only working in one direction... Some of them do not generate proper RS232 voltages like old gear expects. Supplying negative 3V may not be enough. Try a different brand
I don't think there is a Qbus version of any KW11 card. The only ones I'm aware of are for Unibus. There's a KWV11-A and KWV11-C for Qbus, but I don't know about a KWV11-K
There are still modern desktop mainboards with native RS232 ports; my MSI B350 Tomahawk has one.
USB-Serial converter only working in one direction... Some of them do not generate proper RS232 voltages like old gear expects. Supplying negative 3V may not be enough. Try a different brand
Will a KW11-K work in there?
I don't think there is a Qbus version of any KW11 card. The only ones I'm aware of are for Unibus. There's a KWV11-A and KWV11-C for Qbus, but I don't know about a KWV11-K