[Elecraft] Fw: ESSB

[Alan Bloom]

I have the TX equalizer set to suppress the lows and emphasize the highs
to get a reasonably-flat RF spectrum with my voice.  Also I notch out
around 800 Hz since those frequencies are not important for voice
communications:

1   50 Hz -16 dB
2  100 Hz -16 dB
3  200 Hz -16 dB
4  400 Hz -10 dB
5  800 Hz -16 dB
6 1600 Hz   0 dB
7 2400 Hz  +3 dB
8 3200 Hz  -6 dB

With those settings my voice looks flat on a spectrum analyzer except
for the notch at 800 Hz.  I should point out that I'm using a
computer-type mic/headset which has flat frequency response.  With a
communications-type microphone you wouldn't need that extreme treble
boost.

The settings for non-ESSB SSB are the same except that #8 3200 Hz is +6
dB instead of -6 dB.  With those settings the ESSB and SSB spectra look
very similar.

Alan N1AL



On Mon, 2011-04-25 at 21:41 -0700, Rick Prather wrote:
> Alan,
> 
> You make an interesting point!
> 
> How do you have your EQ set in the setup you describe?
> 
> Rick
> K6LE
> 
> 
> On 4/25/2011, at 8:38 , Alan Bloom wrote:
> 
> > and the TX equalizer
> > set to limit the transmitted bandwidth to about what it would be using
> > regular SSB. 
>