Yes, drilling ferrite cores would be a neat trick! My guess would be that it
is the entire coil bouncing as a unit on the core. A few loose turns on the
coil won't usually produce too much additional noise, assuming that they are
neatly wound (which may well be an assumption too far, of course)
Where I would be concerned in covering the entire coil with shellac or
similar is that this will rapidly impinge on the heat dissipation of the
coil, which is already marginal (hence the overheating issues on rapid -
firing sequences), so go sparingly.
Julian
----- Original Message -----
From: "Jim Brokaw" <jbrokaw@xxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Friday, October 17, 2003 8:33 PM
Subject: Re: [OM] Re: [OT]Transformers (was Noisy T32 (wax potting))
> CH also mentioned that the T-32 transformer is a ferrite-core part. Hence
no
> laminations, so the noise must be coming from something else. I'd be
> inclined to closely check the solder joints for vibration induced
> 'cold-solder' effect, maybe touch them up anyway, then flood the coils
with
> something that might damp out any vibration in the wire loops. I suppose
wax
> or shellac or whatever could be used. If it isn't sounding like a 747
taking
> off I don't think I would make the effort... if you can hear it at least
you
> know its working. <g>
> --
>
> Jim Brokaw
> OM-'s of all sorts, and no OM-oney...
>
>
>
>
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