[Elecraft] KPA-1500 issues

[ANDY DURBIN]

"However, since the amp is being keyed while the tuner is changing presets, the  amp immediately faults and goes off line. This is very annoying, and  probably not so good for either the amp or the tuner."

That should not happen.  The KAT500 should open the amp keying line before changing the LC selections.   If it is happening to you it suggests that you are not running the amp keying line though the KAT500, or the KAT500 is not performing as intended.  The interrupt is monitored by the KAT500 utiliity but the update rate is too slow to catch a typical keying interrupt.  E.g. a single step change in the value of C shows a 167 ms interrupt in keying when viewed on a 'scope.

Andy, k3wyc