At 11:30 PM 4/20/2005, someone wrote: >According to the NTE web-site, the NTE251 is an NPN Power Darlington. >The NTE251x (0 thru 9) are silicon switching transistors. The subject device is a NE251, not NTE251. The NE251 is a dual gate GaAs FET. See http://www.cel.com/pdf/datasheets/ne25139.pdf 73, Dick -- Dick Flanagan K7VC NV SM E-mail: k7vc at arrl.org