I have a DB6NT preamp that I picked up a few years ago for use with AO-40 while I was in college. Right now I do not have the time or equipment to work AO-51. It is a MKU 232 A2 Super Low Noise 2.4GHz HEMT Preamplifier with 1268MHz Notch Filter. Measured from the factory with a noise figure of 0.68dB and 40dB gain. Would like to see someone get some use out of it. $100 + sh.

73, Christopher, KB3DXR