PRINCIPLES OF MOUNTING QUARTZ PLATES 



183 



fact that the free end is restricted to zero slope and for a given crystal and 

 support wire it should be determined experimentally using the values ob- 

 tained from equation (8.1) as a guide in the design. The diameter of the 

 solder ball that acts as a clamp may also be determined experimentally by 



^, Itt ^ j Tff t t i fl^> >*«itf -^^d* * -i^tu*-^ * 



Fig. 8.5 — FT-241 crystal mounting. 



increasing its size until the standing waves on the wire to the right of the 

 ball are sufficiently reduced. A practical application of this type of support 

 is shown in Fig. 8.5. The top view shows the small wires soldered to the 

 crystal as well as the solder balls that are spaced at points corresponding to 

 the second node on the lead wire from the crystal. These solder balls act 



