If you look at all transponders tested, and compare the best readings on the 90 cm Paraclipse with the 84-E, there were several instances in which the 90 cm
excelled in the numbers game (carrier-to-noise in dB). I also noted that the NJRC LNBFs used by the Primestar/Channel Master antennas were considerably more linear in their response across the band. If the same LNBF could be used on
both antennas, you would very likely see a slight edge on the Paraclipse 90.
Conventional LNBFs can be used on the Primestar, but it usually involved making a "clamp" with a hose clamp sheet metal screwed into each side, and tightening the clamp.
All of that said, the Primestar 84-E is a knockout in performance and efficiency,
and when you can get one, grab it. We have both in stock here at Global, but
the numbers are limited. The 84-E can be shipped at the UPS Oversize 2 rate
(70 pounds plus additional handling charge), and any 90 cm antenna usually
gets tagged as Oversize 3 (90 pound tariff). In most situations this adds
anywhere from 45 to 60 dollars to the freight bill. Should someone want the
90 cm Paraclipse, we often suggest buying two, and shipping them via BAX GLOBAL air freight, where two antennas can usually ship at the same price
as one, because you are still at the minimum tariff....which in many cases is
equal or less than UPS Ground, and much faster.