I still have one of those boxes. They are a little bigger than that cubic
foot and weigh in at ~70Lbs. also They are fetching $5000 and up depending on
the plug ins. To do what Rod wants to do you would need a display frame an IF
plug in and probably 2 RF plug ins. It would go from HF to 18GHz. To get the
most from them you need some additional boxes, like tracking oscillators or noise
generators. There are now several do it all boxes from HP and Tek and
probabaly some much less expensive stuff for the communications serviceman from
outfits like Sencore. Good Luck Rod, but don't expect much for $500. There are
now a lot of kits for many good devices around, it's just finding them that's
hard.