PDF Resolving Furnace and A/C RFI(Radio Frequency Interference … <http://www.arrl.org/files/file/Technology/Solving%20Furnace%20and%20AC_RFI_KM4LHZ_v9.pdf> 73, Tony K4QE > On Oct 4, 2019, at 9:15 AM, MrToby <mrtoburen7 at gmail.com> wrote: > > The ARRL has a 2017 presentation on their website titled "Resolving Furnace > and A/C RFI Problems"