Re: Frako Capacitors for a Studer B67

graeme <graemew@xxxxxxxxx> wrote:

Paul - I disconnected all and the buzz was reduced (but not
eliminated) a plug socket PSU for a preamp (that I rarely use anyway).

Thanks Scott, thanks Paul. It seems that my technicians answer of
power capacitor replacement wouldn't have helped, and you have saved
me time and expense. The electricity here is very dirty, it seems.

It has nothing to do with the electricity being dirty.

I had never heard of the solutions that I'm now reading about, isotek
and isol and other brands of filter/isolator. Although I was familiar
with the concept. I'm surprised this isn't something that I've heard
about before.

This has to be fixed. There is a low noise level with everything that
is plugged into the wall here. All of these solutions that are
marketed for isolating and filtering power supply - I'm looking into
all of these. It will take me a while to get to the best solution.

I thought you said it was a ground loop? If it was a ground loop, you
use audio isolation transformers to break signal grounds. There is a
reason why most professional gear uses balanced signal lines; the balanced
line allows you to break signal grounds readily.

If, on the other hand, you have polluted power line problems, find the
thing that is dumping the trash on the power line and either get rid of it
or put a filter on it.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."
.

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