Message: 5
Date: Thu, 18 Feb 2010 11:11:18 -0800
From: Hal Murray <[email protected]>
Subject: Re: [time-nuts] Advice on 10 MHz isolation/distribution
(Clay)
> Thank you, but I require a circuit without transformers
> for reasons of vibration susceptibility.
Is the problem wires moving relative to eachother within the transformer or
the whole transformer moving relative to the local magnetic field?
Does it help to pot things in epoxy or varnish or ...?
Years ago, when I took the lid off a small mini-circuits transformer it was
just a few turns on a toroid. Something like varnish would be easy to apply.
Hal,
The problem is modulation of the reference signal via relative movement of the
transformer guts. While I understand there are ways to 'harden' magnetic
devices, my application is far too sensitive to even consider a magnetic
approach given the availability of alternatives. Any spurious signals present
on the 10 MHz reference will be increased by 56 dB by the phase-locked loop.
Clay
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