I had Rotrons in 2 of the stations I've worked at. WCIB 101.9 Falmouth MA had 2 of them in its CCA FM25000DS transmitter. Came across 2 more at WBSM 1420 New Bedford MA in the BC-5H we had there.They worked well, were built like tanks, easy to clan and replace bearings in. Dave Gardiner WVCH 740/WNWR 1540 Philadelphia