The thread on best tube phono pre-amps under $400 has a number of posts by forum member 'Slack' mentioning the old Realistic 42-2101a phono stage: http://forums.stevehoffman.tv/threa...-amp-under-400-00.382960/page-2#post-12808066 This is a unit from the seventies, as far as I can tell. Slack said that the pre-amp is competitive with modern, much higher priced phono preamps. I ordered the earlier 42-2101 via ebay, it arrived last Thursday: Right out of the box, the preamp sounded average, like the phono stage of your typical 1970's receiver. As you can see, there's no on/off switch on this side of the unit, the other side only has a captive non-polarized a/c plug/cord and a ground terminal. The phono pre-amp took several days to warm up. It's on the bright side, which helps with my cartridge of choice, the Shure 97xe. It also seems to reduce subjective levels of background noise, images very well and has strong bass. As Slack pointed out I wonder if anyone else on this forum has used this preamp or the follow-up "a" version. Mine was $30 + $13 of shipping. I'm very happy with mine.