Good advice Yuri...
But, I think the first thing he needs to do is get some aluminum roof
flashing from Home Depot and cover the top of the operating bench with
it and set the equipment on the flashing... Ground every piece of gear
to the flashing with short connections... THen hang a quarter wave of
wire off the flashing (68 feet for 80/75) - which becomes an RF
counterpoise, and route it down the hall, or out a wind0w, anywhere to
get the far end as far away as possible from the computer and the
110/220 electrical wiring in that room...
Another trick is to use a small antenna tuner as the ground radial
tuner - I prefer simply cutting the RF counterpoise to a quarter
wave, cheaper too...
The next thing is to get the Logic Tech wireless keyboard and mouse...

denny / k8do