[Yaesu] Howling with the MarkV

[Stonge, Laurier]

Hi folks,

The other day I was listening on 40m and went through the usual adjustments
of PBT and such and ran into a situation where the receiver howled which
surprised the daylight out of me. No idea of just how I got into this
situation although I remember it was an SSB signal passing through the
2.4KHz filter and I was using the notch to remove an adjacent strong signal.

Is this to be expected?

Laurier    W1LSO