[RFI] Thermostat/HVAC Susceptibility

[Jim Brown]

On 1/7/2026 1:03 PM, Dan K2YWE wrote:
> That's not surprising. My installer told me that Ecobee. I think, provided
> a ferrite bead with their thermostat.

A ferrite bead MAY satisfy EMC requirements at VHF/UHF, but is next to 
useless at HF and below.

Multiple turns must be wound around a Fair-Rite #31 core, and they must 
be wound in sequence around the core, to be effective at HF and below.

73, Jim K9YC