Hi The real answer is that nobody knows. The economics essentially make finding out very expensive. Q most certainly goes up, I don’t think anybody disputes that. The questions about flicker / ADEV all revolve around small blank parts with major edge sensitivity issues. They also probably were not running in a very good oven. Unless somebody with very deep pockets decides they need to find out, it’s going to be an un-answered question.
Bob On Nov 1, 2013, at 11:41 PM, Richard (Rick) Karlquist <rich...@karlquist.com> wrote: > > > On 11/1/2013 8:28 PM, Bob Camp wrote: >> HI >> >> If you doubled the diameter of the blank each time you cut the frequency in >> half, all sorts of nice things might happen. If you start with a 1/2” blank >> in at 10 MHz that goes to 1” at 5 MHz and 2” at 2.5 MHz. Around 1 MHz you >> would get to a 5” blank. >> >> Good luck finding high grade quartz bars to cut 5” (or even 1”) blanks out >> of. You are going to have to go back to the autoclave fixtures at the very >> least. Since growth is (at best) linear you cost of quartz will scale with >> the size of the blank. I’d bet it scales a bit more than that if you want to >> keep the material at a high level of performance. > > You've explained the excuses vendors give for not making full > size crystals. But the question is, given these realities, > does this reduce the theoretical advantage of the lower frequency > and by how much? > > Rick Karlquist N6RK > _______________________________________________ > 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. _______________________________________________ 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.
