The size of the digits would certainly have an effect on the particular resonant frequency.  I would think the larger, and therefore more massive digits, would have a lower resonant frequency.    Ira.




On 2/8/2020 7:29 AM, '[email protected]' via neonixie-l wrote:
On Friday, February 7, 2020 at 8:59:19 AM UTC-8, gregebert wrote:

    ...Some folks in this group have reported audible noise from
    multiplexing....

I am one of the people who reported singing in my multiplexed B7971s.  More than 40 years ago, I also had a Panaplex/MM5314 clock that was sold as an evaluation kit.  It has been a long time, but I do not remember it producing acoustic noise.  Maybe the size of the digits makes a difference here.
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