KR400 manual here... http://www.w4rp.com/KR400/ Roger WA1KAT On 5/10/2011 6:20 PM, i8cvs wrote: > Hello, Sven LA6KJ > > The only information I got from the schematic diagrams is that the azimuth > motor for the G5400B is a KR-400 and it is an old model of azimuth rotator > used about 25 years ago as a single azimutal unit.