While going through my dustpile, I came across this communications receiver front end: http://www.sydex.com/images/fe.jpg I vaguely remember picking it up in the 60's on Chicago's S. Michigan Ave. "Radio Row" (as boxed new surplus) and that I hooked it up long enough to determine that the IF output is 1600 KHz (or should I say KC?). It's undoubtedly part of some dual-conversion receiver--I suspect something like a Heathkit, but that's just a guess. Tube lineup is 12AT7, 6CS6 and 6BZ6. My question is if this is something worth selling or if I'm likely to lose my 65 cents eBay listing fee. Any additional information from someone who recognizes this would be welcome. Cheers, Chuck