[R-390] Chinese parts

[Andy Jackson G8JAC]

Probably made by these guys:
<http://companydatabase.org/c/aircraft/helicopter-manufacturers/electronic-d
esign/new-york/edo-artisan-inc.html>

I think that FSNs were expanded into NSNs starting in 1956 and the
changeover took quite a long time.

Andy

..>I guess everyone has "focused" in on the NSNs vs. the FSNs, and the two
..>specified digits.
..>
..>I would like to point out - AND - REMIND folks, in addition to
..>asking again.
..>
..>The ORIGINAL BFO in my '51 Contract Collins Blue Striper - has the tag
..>still on it.  It is MADE BY *ARTISAN*. (All the modules are COLLINS.
..>The IF module has stamped on the side adjacent to the "frame side":
..>FINAL I. F. UNIT (2nd Line) - 540 7577 006 (3rd Line) COL. SER. NO.
..>(Then a separate stamp in larger "font") 35.   It also is stamped on top
..>with a MOD 1.  all of these markings are covered with either a varnish
..>or shellac.  I'm not sure which.
..>
..>I will NOT polish the aluminum as some do, as this would - 1) Serve no
..>purpose.  The aluminum is MFP'd, and is NOT corroded.  2) It would
..>remove all the original "ink" stamps that identify them.
..>
..>The Fair Radio BFOs are MADE BY *ARTISAN*.
..>
..>The BFOs being sold by Surplus Sales of Nebraska are MADE BY ARTISAN.
..>
..>Where in the *bloody* world did ANYONE derive that these are
..>CHINESE PARTS!
..>
..>Bob - N0DGN