); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY From: Hal Murray <[EMAIL PROTECTED]> Subject: Re: [time-nuts] FMT on October 13 Date: Tue, 25 Sep 2007 14:23:21 -0700 Message-ID: <[EMAIL PROTECTED]>
> ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > > > Make sure not to get near any of the equipment. Free-running > > oscillators are sensitive to vibration or shock. You've probably heard > > the story of my best Sulzer oscillator making small phase or jumps > > which I eventually correlated to when the kids flushed the toilet down > > the hall. > > Did mounting it on a block of foam help? That is a rather bad solution. You want much softer material to react to quicker things, such as silicon rubber. Also, that would only be a 12 dB/Oct solution. You would really like a few more poles there. The trick is to add weight to the calculation. So you want a very soft material, holding a thick block (lead) and from this base suspend the oscillator through a soft material again. Now you have a 24 dB/Oct solution. The trouble you now will have is that the wires will be another shock/vibration transport mechanism. They would need to be connected to the middle-frame such that outer forces hit the middle weigth and not directly on the sensitive part. They would need to be soft and arranged is such a way that they do not push or pull the inner end, but is allowed to flex alot. It is all just as normal filtering, but in the acoustical domain. Cheers, Magnus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
