[Elecraft] Amp keying circuit K2

[David Douglass]

Hi,

Just a quick question..

I've just installed the parts in my basic K2 to externally key an amp. I've
just tried to key my old FL-2100B with this, but have found that as soon as
I plug the cable in, the amp keys when the radio is still in RX ??

Is there a menu setting I need to change or have I made a mistake on the
circuit ?? The cable is fine as I use this on my FT1000mp to key the same
amp.

I've checked the resistance on the keying circuit and I get about 18ohms,
when the radio is keyed, as opposed to open circuit when in the RX state ??

Thanks

David, VK2NU