[Hammarlund] Mechanical filter for SP-600?

[Bruce Sugarberg]

Hi Craig,

I believe Collins offered one.  A very small box that
contained the filter and a tube, and replaced the 1st
IF tube.

73, Bruce WA8TNC
====================
Craig Roberts wrote:
> Has anyone installed a mechanical filter in an SP-600?
> 
> Craig
> W3CRR



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