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BC 221 Frequency Meter tidy up
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19-02-18, 08:39
Bruce MacMillan
a Canuck/Brit in Blighty
Join Date: Jul 2004
Location: Hell Fire Corner, Kent UK
Posts: 703
The 6 holes should line up with the aluminum backing plate to the calibration book, BC221a. BC221b is the crystal and it is mounted underneath at a right angle, much like the valve on the other side.
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