I got an old Primestar 3ft eliptical dish for wifi use. However, I got
a NEUSAT SP-6000 and want to hack with it. [Not rip off any services,
but just learn something about satellite TV reception.] Anyway, the
dish came with a LNBF marked with njr2156f. Any specs on this?

All google can dredge up (via a Spanish to English translation) is:
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NO, THAT THE lnb TE ofresco is neither appear or the same DIRECTV, if
one of those...