During my employed life, I worked on classified projects for the
military and we often worked in SCIF's [shielded rooms] to keep the
computer emissions confined. Double doors with phosphor bronze fingers
on each, copper shielding in the walls, floor, and ceiling, etc.
Generally speaking, a test radio was pretty much silent inside on any
frequency.
However, all of the noise I see on my P3 and hear comes in on the
antenna coax. If it is disconnected from the K3, I hear only circuit
hiss. I doubt shielding your shack will be worth the cost and effort.
You can't beat K9YC's dissertation on chokes [
http://audiosystemsgroup.com/RFI-Ham.pdf] and proper choking and bonding
WILL have a profound effect on common mode noise.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 2/26/2020 5:14 AM, ae...@carolinaheli.com wrote:
Aside from installing ferrite on all cables (not sure why this isn't
integrated somehow if it's that large of an issue) would having the shack
walls lined with a grounded screen help reduce/eliminate radio noise?
Is the cost/effort worth it?
My wife and I are planning to build a house in a few years and I'm planning
out my station.
Based on the noise issues I have and have researched it sounds like I need a
shielded room where all cables in/out are wrapped in ferrite and power is
routed through a 1:1 transformer OR true sine wave UPS.
Then I still have to deal with computer equipment noise and anything else to
get a clean signal where the ground noise is low.
Jerry Moore
Cell: 803-431-1870
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