On 6/5/2016 5:03 AM, Joel Black wrote:
I’m pretty sure I can bond the KX3, PX3, and MFJ-4125 but I don’t
have a *clue* how to bond the iMac. It’s a late 2012 27” iMac. It’s
an all-in-one with *no* external screws. It’s the model with the
“pregnant” bulge in the back. However, if it means I have
Get a big clamp-on ferrite and wrap the power cord through it as many times as
will fit. Do that as close as you can to the back of the iMac. The iMac has a
three-conductor power cord, so try and get all of the power cords for your
equipment to a single power strip. This is a start at bonding
much noise comes from and iMac from the USB cables, beads will greatly
reduce the noise... Fred
On 6/5/16 9:35 AM, John wrote:
> Can’t do that - with the iMac the power supply is built in…it’s an
> all-in-one.
>
>
>
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> On 5 Jun 2016, at 2:42 PM, Buck via Elecraft
Can’t do that - with the iMac the power supply is built in…it’s an all-in-one.
On 5 Jun 2016, at 2:42 PM, Buck via Elecraft wrote:
Here is the authority on the issue. http://audiosystemsgroup.com/RFI-Ham.pdf
Have you put ferrite on the cables from the iMac and the
Joel,
Good progress.
Yes, the roofing filter is not usable with the 8kHz shift engaged. This
is not a firmware problem, it is a hardware problem. Think of it this
way - the "IF" for the KX3 is at baseband (audio frequency range), and
that is where the roofing filter works - in other words,
Here is the authority on the issue. http://audiosystemsgroup.com/RFI-Ham.pdf
Have you put ferrite on the cables from the iMac and the switching power
supply?
You've used "star" grounding around the KX3. Try bonding everything to
everything - you want to provide a low-impedance parallel path
I figured out most of my problems with all the spikes on the PX3 - the
switching P/S in my iMac. To a lesser extent, I can hear the MFJ-4125 switching
P/S I use to power the KX3 and PX3. I cannot remember if I tried looking at the
spectrum using the Astron RS-35 as a power source and plugging
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