Hal Murray wrote: > [EMAIL PROTECTED] said: > > >> The key points which yield the BVA's improved aging are, that - the >> whole resonator package is made from quartz, consisting of the >> resonationg quartz plate in the middle section and the two mounting & >> sealing plaates on top and bottem - you may call it a Hamburger style >> ;-) - the resonating plate is held through quartz bridges rather than >> metal suspensions, thus reducing mounting stress. >> > > Neat. Thanks. > > Why is the top domed? I assume flat would be easier to manufacture. > > Why is it not symmetrical? If the top is domed, why not the bottom too? > > > > One surface is convex to facilitate suppression of unwanted harmonics. Its actually quicker and easier to make a planoconvex "lens" than a biconvex one.
Bruce _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
