[Elecraft] KPA500 No Output on 6m

[dave ingebright]

Bought and assembled a KPA500 kit in 2018. No output on 6m!! I've used it on 10-80 and love the performance. Never checked six until I became interested in six this summer. Put up a 3 ele yagi and its good barefoot/good match but no output on six using the KPA...
Any ideas? Here's a link to my assembly picts: https://www.valhallatreefarm.com/WB7ELY/kpa500/kpa500.htm
73,
Dave WB7ELY