The receiver for the Portland Tower (KPDX) feed appears to be on its last legs. The display died a while ago, then the volume started getting wacky. Finally I have had to progressively turn up the squelch knob for it to work recently and it's maxed out and not working anymore, so I'd say that's the end of this radio
I have a replacement on the way so hopefully I'll have it swapped out in the next few weeks. I will leave it online but it is stuck on 123.775 with no squelch until replacement.