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

[Mark Ethridge]

Wayne,
What gain and vox settings are you using?

On Tue, Jul 3, 2018 at 12:27 PM, Wayne Burdick <n6kr at elecraft.com> wrote:

> The numeric value is a relative indication generated by the math we use in
> our algorithm; it’s not actually an attempt to quantify compression in dB.
> Multiple factors including power level, ALC level, and mic gain setting are
> taken into account. I’ll dig up the full details of the implementation when
> I get a chance.
>
> Meanwhile (anecdotally): at any setting the compression is very clean, and
> at the high end it greatly increases the “punchiness” of the signal.
>
> Wayne
> N6KR
>
>
> > On Jul 3, 2018, at 10:14 AM, Jim Brown <jim at audiosystemsgroup.com>
> wrote:
> >
> > 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
> >
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