I tore into the amp last night and found the low power side contacts on the open frame T/R relay to need some TLC. I guess even a 35 year old relay needs occasional service. The amp was back to its usual stable self this morning. The amp is a homebrew 3CPX800a7 I stuffed into an old Dentron case - only the power transformer, power switch, and T/R relay are orginal.
|I still want an Elecraft KPA500!|
|Here's another view of our camping area. At least it was a great day.|