On 7 jul 2009, at 18.53, DM5TI Gerard Jendraszkiewicz wrote:
> I wonder if anyone else experienced this type of problem and has a
> possible solution ?
>
> Independent of any connectiions I found out a 50Hz hum on my Line-In
> audio. After a long investigation I figured out
> it was a coupling wit
On Tue, 07 Jul 2009 15:39:38 -0400, Jack Smith wrote:
>Of course if one does not wish to perform surgery on the K3, it would
>be possible to set up a 3-dimensional Helmholtz coil around the K3 fed
>with 50 or 60 Hz line voltage and adjust the X, Y and Z Helmholtz drive
>(level and phase) to nu
Of course if one does not wish to perform surgery on the K3, it would
be possible to set up a 3-dimensional Helmholtz coil around the K3 fed
with 50 or 60 Hz line voltage and adjust the X, Y and Z Helmholtz drive
(level and phase) to null the ambient field at the offending transformer(s).
Jack
On Tue, 07 Jul 2009 13:13:57 -0400, Jack Smith wrote:
>Another alternative is to replace the transformers with shielded
>versions, assuming space on the PCB is available and a shielded
>transformer with the same electrical specifications and footprint
is
>available.
Or simply eliminate the tr
Same effect can be seen in the output transformers since none of the
K3's transformers are magnetically shielded.
I found 20 to 25 dB difference in induced hum by rotating the K3 in
three dimensions. Whether the hum minimization orientation puts the K3
in a usable position is another question.
Hello,
I wonder if anyone else experienced this type of problem and has a
possible solution ?
Independent of any connectiions I found out a 50Hz hum on my Line-In
audio. After a long investigation I figured out
it was a coupling with other transformers external to the K3. The
transformer of m
6 matches
Mail list logo
