[VHFcontesting] BLF278, MRF151G, SD2942, or??

[Bill Olson]

Hi all, I am using a DMOS FET for 300 watts in my 6M, 2M, and 220 amps. A while ago I acquired a few boards with the BLF's that were easily modified for 2 and 222. (Thanks N1DPM).. The DMOS FETs are not very rugged and inevitably I ran my 6M and 2M amps into an open load and blew the FETs. The devices are now pretty much obsolete but I'd like to get a few replacements so i can get my amps back running again while i look for something more rugged (like the LDMOS Ampleon BLF183XR) to replace them with. I tried ordering a BLF278 from China but it was a dud. I'd take anything The Phillips or NXP BLF 278, Motorola MRF151G, and the Thomson SD2942 all seem to be roughly equivalent. i.e. 300 watt 50 volt VHF push-pull MOS devices. Does anyone have an old board or 2  from a TV amp with one of these parts? Maybe something damaged but the transistor might still be OK? At this point I don't want to pay a premium new price for an obsolete transistor.

I await,... thanks - bill K1DY in Maine