Don,
First get some copper braid or #10/12 stranded wire and bond things
together. bond from the computer to the Rigblaster, the Rigblaster to
the K2, the K2 to the KAT100, and from there, bond the KAT100 to the
station ground.
Secondly, make certain all your station equipment is powered from the
same electrical receptacle (everything connected to the same 'green wire
ground'.
What I am relating in simplified format is the same as you can find in
K9YC's writings - see http://k9yc.com/GroundingAndAudio.pdf for a LOT
more information on the subject, including the "why" of it all.
If you currently have all your station boxes connected to a bus bar
behind the desk or to a single point station ground, look at what Jim is
telling us in that presentation and try his grounding method instead -
it is designed to reduce hum and noise in your audio circuits. Using
heavy wire or braid for the bonding assures that you still have good
lightning protection in the shack.
If you have station ground rods driven that are not connected with heavy
wire (#4 or #6) to the utility entrance ground, add that connection, not
only for possible noise reduction, but also for your personal safety as
well as compliance with National Electrical Code requirements.
73,
Don W3FPR
On 6/15/2015 4:33 PM, Don Latham wrote:
I'm trying to use a Rigblaster plus with my K2 with 100 watt amp and tuner.
I've also tried a MFJ TNC switch. Both for digital mode and microphone
switching. When I use these devices I get interference when in mic mode from
rf pickup. With the mic alone., no problem. Has anyone out there had this
problem? I've tried ferrite chokes on all lines, routing the cables in
different places, etc.etc. I'm totally stumped and very disappointed that I
have to manually replug everything to accomplish a simple (?) switching task.
Anyone out there faced this problem? Any advice?
Thanks
Don
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