the squelch works but not exactly as it should. It seems to be slow closing
after a signal is picked up.

Not uncommon with the Pro 2021.

There is a lone part on the bottm of the circuit board that is broken. It
looks as if it is an rf choke or perhaps a resistor but I cannot determine what
it is or its value.

If it might be a diode, specifically one marked D44 or D45, someone was trying
to extend the reception range of the scanner to include midband (68-88 MHz) and
/ or cellular frequencies.

I have not tried the midband mod, but the cellular restoration mod does not
work ... it only allows you to enter frequencies in that range. The receiver
front end is not designed to receive in that frequency range.


Jeff Multer
Fort Mill, S.C.