[Elecraft] KX3 – is a TX DLY function available?

[Graham g3tct]

I have no problem driving a linear with a slow relay from my K3, but my 
KX3 causes the linear to trip out when I try to use the cw in ssb mode 
(cw in cw mode behaves ok). In the K3 manual it refers to the delay in 
producing RF – TX DLY which has a default of 8ms. But I can't see an 
equivalent function in the KX3 – might this be the problem, and what 
default value does it use?

Graham