[Elecraft] ESSB Works Well

[Don Rasmussen]

Lance,

>From my test here, any receiver capable of a 2.8 khz
passband will hear the K3 3.0khz ESSB signal as if it
were more like an AM signal, except that the AGC is
not held constant by a carrier (on the receive end).

That is to say it sounds a lot like Drake controlled
carrier AM to me. Or, like listening to an AM
shortwave broadcast with a SSB receiver.

An IC756Pro, 746Pro, Orion, Jupiter, Flex, all will
hear a significant increase in fidelty from K3 essb
transmit at 3khz as compared to standard K3 ssb at 2.7
khz.

My Drake R4C on the other hand has a strict 2.4 khz
SSB filter. To receivers like this, the OMNI C, K2,
and some others the band will still sound like it
always has (communications grade) even though there
might be some EESB stations transmitting.

I hope you have something wider than the 2.7 khz
filter coming, although 2.7 (from my tests) does a
fairly inpressive job of producing quality audio from
the K3 at 3khz essb.
 

[Elecraft] ESSB Works Well
LANCE COLLISTER w7gj at q.com 
Sat Aug 2 21:48:24 EDT 2008 


Don Rasmussen wrote:
> Downloaded 2.23 here and setup for ESSB. Not a
glitch,
> as usual. At 3.0khz as compared to conventional SSB
at
> 2.4 or 2.7khz it does not seem to be a new mode
worthy
> of a different name, but the audio sounds much
fuller,
> much more human.
> 
> I had a headset connected to my Corsair II which has
a
> 2.8 filter and did some comparisons.
> 
> Where the two microphones I have sounded very
similar
> before, and the TX equalization made only a nominal
> difference, using the essb setting there is a
> pronounced difference between the D104 and the Shure
> 444. And the TX EQ settings now seem almost
> hypercritical. 
> 
> Changing one EQ band EQ by one number can make a
very
> significant difference.
> 
> We are not waiting anymore for firmware features
here,
> absolutely 100% happy with the radio.
> 
> But never cease to be impressed when something new
and
> interesting like this show up at the doorstep for
K3.
> Very nice. 
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I am very curious about this ESSB mode....I am getting
my K3 in a few weeks, and 
wonder what it sounds like with a normal SSB receiver
using something like 2.8 KHz 
filter.  Does it sound better/worse/distorted?  Or can
you hear no difference unless 
you have a wider receive filter?  Since most people
just have standard SSB filters, I 
am curious to know if you can use the mode with
others, or only with ESSB-equipped 
stations.  TNX and VY 73, Lance

-- 
Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN,
WA1JXN/C6A, ZF2OC/ZF8)
P.O. Box 73
Frenchtown, MT  59834  USA
QTH: DN27UB
TEL: (406) 626-5728
URL: http://www.bigskyspaces.com/w7gj
2m DXCC #11/6m DXCC #815