[Elecraft] Adapter for use between iPhone headset and a KX2/KX3

[Jim Brown]

On 7/2/2018 5:23 PM, Wayne Burdick wrote:
> I generally leave TX CMP at 20, but even at 30, the audio is very clean. The extra punch can help with QRP and/or small antennas.

Hi Wayne,

You're looking at the wrong thing to set compression, because the 
numeric value doesn't take the mic sensitivity into account. Rather, we 
should be looking at the indicated gain reduction on audio peaks, and 10 
dB is a good objective.

As an audio pro, my advice is 1) set TXEQ so that you're not wasting 
power transmitting low frequency speech sounds (max cut for the first 
three bands, 6 dB cut for the fourth)  2) Set CMP for the indicated 
value of gain reduction  3) Get some signal reports from a good 
listener. This combination results in about 13 dB of increased talk 
power (3 dB for the EQ, 10 for CMP).

73, Jim K9YC