Thanks for your input!
With regards to this:
The RFI wasn't actually entering into the W2IHY gear. It was coming through the mic cable on my Heil boom that has the same exact angle as the Giz when the beam is pointing directly toward the operating position. Some ferrite snap on beads over the cable on either end solved it.
With regards to this:
In reference to a previous post on RFI to w2ihy equipment, I found that above 10m the ihy box is not RFI filtered well enough at 6, 2 and 70cm.
The RFI wasn't actually entering into the W2IHY gear. It was coming through the mic cable on my Heil boom that has the same exact angle as the Giz when the beam is pointing directly toward the operating position. Some ferrite snap on beads over the cable on either end solved it.