Heath FM2 tuner

[Fred]

I recently found an FM2 tuner.  I remember these as early, a little crude and resembling the AR1 and BR1 sets. I am actually impressed with how it works.  There is no RF stage with the antenna coupled directly into a 6SH7 mixer.  I found this tuner quite sensitive and stable as I listen mostly to non commercial stations near the low end of the band. I found info on the other early sets I mentioned on the web.  Does anyone have a schematic on the FM2? 

Thanks in advanced,
Fred
WA3KIO

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