[Elecraft] KAT500 Antenna and Alpha 87A

[Amateur Radio Operator N5GE]

I'm about to send my KPA500 To the shop at Elecraft and I wonder if
anyone has had any success using an ALPHA 87A runing low power into
KAT500?

If so how many watts did you run into the KTA500?

Thanks.

ARS N5GE