[Elecraft] More advice requested

[Peter Alterman]

Well, I've got the KX3 working just fine now. But now I'd like to key my Alpha 9500 with it. Simply connecting the RF output (10w) and ACC2 to the keying input on the amplifier did not do the job.  I have driven the Alpha with 5w and 10w previously so I know it is happy with QRP input. Any recommendations on how to proceed? I'd like to do RTTY Roundup with 100w if possible.

Again, thanks in advance for any suggestions,

Peter W2CDO