Thread: BC 221 Frequency Meter tidy up
View Single Post
  #13  
Old 19-02-18, 08:39
Bruce MacMillan Bruce MacMillan is offline
a Canuck/Brit in Blighty
  
Join Date: Jul 2004
Location: Hell Fire Corner, Kent UK
Posts: 703
Default
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.
Attached Thumbnails
BC221a.jpg   BC221b.jpg  
Reply With Quote