[Hackrf-dev] Replacing the LNA/PA

[Chuck McManis]

Robert, are you looking to fix a broken HackRF or are you re-designing it
to eliminate the use of an obsolete part? If its the former, the part is
still available and if history is any guide it will continue to be
available in piece parts and lots of various sizes for several years.
--Chuck


On Sat, Feb 17, 2018 at 10:18 PM, Robert Chadwick via HackRF-dev <

Sorry if this is a duplicate.
Looking at the schematic, it appears the HackRF uses a MGA-81563 for the
LNA and PA. As these appear to be EOL, and there appear to be many
complaints about the RX performance of the HackRF, has anyone replaced
these with something better? While I haven't yet looked closely at
datasheets to check compatibility and pinout, looking through Digikey
there appears to be a number of possibilities. Might it be possible to
fit in a PSA4-5043+ in place of the MGA-81563?
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[N2CBU]

there appear to be many complaints about the RX performance
of the HackRF

FWIW, dynamic range of the HackRF RX is limited by the 8-bit ADC, not by
the analog front end. Maybe you could slightly improve noise figure with
a better amp, but prolly not worth the trouble.