Can anyone find the reference regarding the requirement to test any new radio frequency change with the squelch?
For someone who has only been flying for 37 yrs, ......
...... PLEASE EXPLAIN !
I know a bit about squelch:
1) I turn it on to set the volume on a VHF radio.
2) I turn it on to pick up the ATIS on VHF much earlier than I would with it turned off.
3) I turn it on (and off) when asked by ATC to listen for an emergency beacon signal.
4) I use it on HF radios to get clearer reception than otherwise might be the case - maybe, or is that "Gain" ?? Haven't used a HF for a few years.
5) I use it on my ICOM handheld VHF to get the clearest reception (it is manually adjustable on that one).
.... but testing any new radio frequency change ??
There are probably few new radios out there with a manual squelch
?? Don't they all have manual squelch (?), just not adjustable squelch
Does anyone know if the squelch is user adjustable on the G430's or similar from the front interface?
Not as far as I know - and I figure I know a bit about the G430/530.
Dr 
PS: If the young'uns dont't know about it - not their fault - they are not being taught !!!