john@datacube.UUCP (11/08/85)
The design of the Carver is "defective" not your paticular units.
Yes there are FCC specs on conducted noise as well as radiated noise.
I know that any new products must conform. I don't know if new
production of existing designs must now be made to comply. I do
know that if an electronic product is changed in any way, that it
must be tested for conducted and radiated noise. Of course
this does not help you if you did not purchase your units
recently.
The interesting thing about the FCC limits is that the
companys producing the products must police themselves. In
other words the company is responsible for testing the product
and making sure it meets spec. To enforce the spec the FCC
does a very very small random sample testing. Typically the FCC
will only go after a product if it receives a number of complaints
about the preformance of that product. Another complication is
that especially for the radiated noise the testing varies a lot
from facility to facility, and from setup to setup. A brand X
amplifier might be 20 db out of spec, and then if different
input cables are used and the speaker cables are repositioned
it could come in spec.
You could try complaining to the FCC. This might lead to
some results in a long time.
I recomend the procedure carver will have to use to fix their
product. A number of companys make little modules called line
filters, these modules filter out noise going either way on the
power line. They consist of a high current low pass filter made
up of one or a number of stages of series inductors, and parallel
caps. The inductors are on both sides of the line. These modules
usually also have transorbs (spelling?), which are devices that
suppress high voltage spikes. Line filters may be selected with
different current ratings and different filter preformance.
Select the best you can afford with the required current rating.
A good 20 amp unit should cost about 20$ I think. If you are a
real man who can make his own inductors from 16 gauge wire
you can make your own.
John Bloomfield
I don't know how to do this one
DIGITALLY
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these are opinions and may not be my own or any one else's
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