Express-vu used to use 24" dishes when they were first introduced but then again they were using a lower powered satellite and H/V polarity. I still have one of the LNBs they used..........then for awhile after they switched to DBS, Star Choice bought all their remaining LNBs and put their own stickers on them.........I digress..........if it's one of the old 24" dishes (with the old H/V LNB) they had, it might work but I'd say 30" is minimum for a decent signal.