Looks like a SP-600 by Hammurlund, doesn't it? Well it is, but
bares a Northern nameplate, with a Model 159 designation. This
receiver was purchased along with a Northern FSK converter, and
contains mods which would seem to indicate it was one of a pair
of receivers used for dual-diversity RTTY reception. If you have
a "Northern 159" that you'd like to part with, please let me know.
Collins 18S-1 transceiver.
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