On Tue, Nov 29, 2022 at 06:19:45PM +0000, Michael Carter wrote: > > The original 100 watt PA (KPA3) used RF BJTs as the finals, > whereas the KPA3A used RF MOSFETs (LDMOS). This is an early K3 - it does have some K3S upgrades. s/n 1573 -- George Fremin III - K5TR geoiii at kkn.net http://www.kkn.net/~k5tr