ESSB Works Well

[Don Rasmussen]

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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[W7GJ, Lance]

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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> Post to: [hidden email]
> You must be a subscriber to post to the list.
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> Elecraft web page: http://www.elecraft.com
>

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: [phone]
URL: http://www.bigskyspaces.com/w7gj
2m DXCC #11/6m DXCC #815

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[Julian, G4ILO]

W7GJ, Lance wrote

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

They would not hear much difference, but they will probably be able to hear some in an A/B comparison, because their filter does not cut off absolutely at 2.7KHz or whatever, so some of the extra information will get through.

But you will be wasting power generating frequencies that are more or less wasted on the station you are working, and which could be causing QRM or simply taking up space that someone else could be using. In my opinion, it's only appropriate to use ESSB when you know that the other station is also equipped to receive it, on a band that is quiet enough that the wider signal is not preventing someone else from having a QSO. From that standpoint, it is a pity that it has to be enabled or disabled by going into the CONFIG menu, because that seems to imply that it is a setting that people will either use most of the time or not use at all, rather than something you enable (perhaps using MODE ALT) for a particular contact when circumstances permit, and then turn off when that contact has ended.

[Dave, G4AON]

It's easy to turn ESSB on/off by assigning it to one of the "PF" keys.
You still have to toggle it on/off with the "1" key then exit the menu,
but it's fairly quick and easy.

I would welcome a test with another ESSB station to try mine. I find a
few AM stations around but hear very few ESSB QSOs. The K3 sounds superb
at 2.8 KHz bandwidth, so with my deep voice I am not sure ESSB would be
of any real use, but I would like to at least give it a try.

73 Dave, G4AON
K3/100 #80
----------------
But you will be wasting power generating frequencies that are more or less
wasted on the station you are working, and which could be causing QRM or
simply taking up space that someone else could be using. In my opinion, it's
only appropriate to use ESSB when you know that the other station is also
equipped to receive it, on a band that is quiet enough that the wider signal
is not preventing someone else from having a QSO. From that standpoint, it
is a pity that it has to be enabled or disabled by going into the CONFIG
menu, because that seems to imply that it is a setting that people will
either use most of the time or not use at all, rather than something you
enable (perhaps using MODE ALT) for a particular contact when circumstances
permit, and then turn off when that contact has ended.

-----
Julian, G4ILO
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[Barry N1EU]

W7GJ, Lance wrote

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?

A K3 ESSB transmit signal at 3.0Khz+ bandwidth will be heard with slightly "more fidelity" (i.e., wider passband) than a non-ESSB transmit signal when received on a K3 with a 2.7Khz filter.  That's because
the non-ESSB K3 transmit signal has an approximately 2.5Khz wide passband and doesn't "fill" the 2.7Khz receive passband.  The ESSB signal won't sound "distorted" - you just won't hear the entire transmit passband, but it will still sound "very good".

Of course the ESSB transmit signal will be heard with increasing fidelity (wider passband) as the receiving filter is widened.

FYI, there's a plot of the K3 transmit passband at the bottom of http://n1eu.com/K3/K3_notes.htm

73,
Barry N1EU

[Brett Howard]

All one has to do is set it up as a PF1/2 or M1-4 hotkey and then they
can turn it on/off...

On Sun, 2008-08-03 at 02:03 -0700, Julian, G4ILO wrote:

>
> W7GJ, Lance wrote:
> >
> >
> > 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
> >
> >
>
> They would not hear much difference, but they will probably be able to hear
> some in an A/B comparison, because their filter does not cut off absolutely
> at 2.7KHz or whatever, so some of the extra information will get through.
>
> But you will be wasting power generating frequencies that are more or less
> wasted on the station you are working, and which could be causing QRM or
> simply taking up space that someone else could be using. In my opinion, it's
> only appropriate to use ESSB when you know that the other station is also
> equipped to receive it, on a band that is quiet enough that the wider signal
> is not preventing someone else from having a QSO. From that standpoint, it
> is a pity that it has to be enabled or disabled by going into the CONFIG
> menu, because that seems to imply that it is a setting that people will
> either use most of the time or not use at all, rather than something you
> enable (perhaps using MODE ALT) for a particular contact when circumstances
> permit, and then turn off when that contact has ended.
>
> -----
> Julian, G4ILO
> http://www.g4ilo.com/ G4ILO's Shack
> http://www.ham-directory.com/ Ham Directory

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