New Heat Pump = Summer QRM is Gone!

I’ve been plagued here at the new QTH with terrible QRM during the summer on 20M. There was no question is was caused by the heat pump.  As long at it was off everything was great. When the heat pump was on the QRM was S9. It made 20M unusable during the summer.

A couple of months ago we needed to have the old heat pump replaced.  The QRM is gone!