I tried the mod #2 on Rogerbirds site for talk back removal and it did not work. I can still hear audio thru the internal speaker when transmitting. I used a 1n4148 diode and the mod calls for a 1n914a I think it was but the spec sheet shows them to be almost identical. Anyone do this mod or try the 3rd mod on Rogerbirds site? I hate that audio while transmitting.