"transistorphonics"

[Chris Trask]

On Tue, 9 Mar 1999, Peter L Thompson wrote:

> Hi, Heath fans
> How can you have microphonics in a solid state scanner?
> Anyone have a suggestion for that one? I'll listen............
>
        Microphonics in either crystal or LC oscillators is a very common
problem.  I once spent two months with a 4-channel crystal oscillator
AND a CO2 temperature chambre mounted ON a hydraulic vibrator trying to
track down the cause of vibration sensitivity (microphonics) at -10C.
Turned out that the entire assembly needed to be shock-mounted.


     ,----------------------.       Circuit Design for the
    /    What's all this     \            RF Impaired
   / extinct stuff, anyhow?  /
   \  _______,--------------'        Chris Trask / N7ZWY
  _ |/                               Principal Engineer
 oo\                                 ATG Design Services
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  \  \    .'  `.                  Tempe, Arizona 85285-5240
   \  \  /      \
    \  '"        \                     Technical Editor,
     .       (  ) \                      QRP Quarterly
      '-| )__| :.  \                     QRP ARCI 9464
        | |  | | \  '.
       c__; c__;  '-..'>.__      Email:  ctrask at primenet.com
                               http://www.primenet.com/~ctrask

                    Graphics by Loek Frederiks

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