[time-nuts] 5060A question
magnus at rubidium.dyndns.org
Mon Jan 7 21:51:33 EST 2008
From: Bruce Griffiths <bruce.griffiths at xtra.co.nz>
Subject: Re: [time-nuts] 5060A question
Date: Tue, 08 Jan 2008 15:31:17 +1300
Message-ID: <4782E075.5040906 at xtra.co.nz>
> > Maybe set up a tuned box around it to cancel whine.
> > MVH
> > Magnus
> Hej Magnus
> Do you mean an active noise cancellation system??
No, you could do that too, but I was basically refering to a simple box tuned
in size to cancel at 2 kHz. Toss in a thick cloth for additional resistive
You could even go Helmholtz if you want.
Simple passive cancelation. Classical acoustical approach. For 2 kHz it is in
Another thing is to put heavy lead-rubber on the metal faces to make them less
of a resonator/radiator. That mod can be done inside the box.
There are a whole bunch of other tricks. Pressing on the surfaces of the
whining chamber will make it stiffer and provide a higher acoustical impedance.
Pressing using rubber blocks, from say silicon rubber, is known to work.
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