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Old 14th Oct 2020, 8:06 am   #6
Jon_G4MDC
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Join Date: Nov 2015
Location: Welwyn Garden City, Hertfordshire, UK.
Posts: 2,013
Default Re: Grinding crystals

You will never get that far!
I reckon perhaps they managed 10kHz or so at 7MHz with their FT243s.

Even desoldering an HC6U and letting the air in and some flux vapours out sends it massively LF. A failed attempt on a Pye U450 TX crystal tells me this.
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