DDU firmware update for Damage from repeated ~100w input to the KPA-500 with amp not keyed

Keith KV5J

KV5J's Digital Display Unit for the Elecraft KPA500 amp

I have added the code needed to drop the mode to standby if the amp is in operate and excessive power in applied without the amp being keyed.
This may cause damage to the amp.

All new DDUs will have this firmware version.  Older units will be updated free less shipping.

Email me for upgrade details at:  DDUinfo@... 

Keith, KV5J