[Milsurplus] Identify some small modules?

[antqradio at juno.com]

Possibly a radio hydrophone (radiosondes ?) receiver?  I think the
frequency band is right.
Regards,
Jim

On Wed, 21 Sep 2005 14:25:49 -0700 "Ian Wilson"
<ianmwilson at earthlink.net> writes:
> These are 7" x 2.5" x 1.5" and 7" x 2.5" x 2".
> Contain subminiature tubes (5678, 1AD4, 5783, 5840).
> All are marked "152-174 MC".
> I have 3 modules: Local Osc / RF Ampl / 2nd IF Discr.
> 
> Was wondering what equipment these would be from.
> 
> Thank you,
> 
> --ian K3IMW