Buonasera Gian,
I did not have any luck with this mod. While I tried the previous versions as well, the clicks remain throughout testing.
I did get the LM386 to mute properly by using a modified version of your Rev 5 schematic. I ran a 1n4148 from +12 to pin 6 of the amp, and used the collector of the 2n3906 through a 1n4148 to bring pin 8 of the amp high on PTT. The amp did not return from mute after PTT was released, however.
It should be noted my radio is up do date with Allard's code and hardware mods at Raduino v1.20.1.
Hopefully this will give some insight for the next steps.
Grazie,
Jonathan, N0JMS
