K3: ESSB firmware released to field testers

[wayne burdick]

I released MCU revision 2.23 to our K3 field-test group earlier this
evening, making our promised July deadline for ESSB (Extended Single
Sideband). The maximum ESSB transmit bandwidth is about 4 kHz -- this
is also the WIDTH control limit in SSB mode for receive purposes. A 6
kHz filter (AM) on the RF board is required to use ESSB, either in RX
or TX mode.

This revision also includes changes that we hope will eliminate the
power output difference between LSB and USB.

If all goes well, we'll post revision 2.23 on our web site (as a beta
release) on Friday.

If you have a 6-kHz filter and would like to get a jump on ESSB testing
(which we'd appreciate), please send me an e-mail and I'll send you a
.zip file with this firmware revision.

73,
Wayne
N6KR

---

http://www.elecraft.com

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[Joe Subich, W4TV-3]

> A 6 kHz filter (AM) on the RF board is required to use ESSB,
> either in RX or TX mode.

What about the FM filter for transmit and receive?  It's better
than the typical 20 to 40 KHz wide 70 MHz filter in other rigs.

73,

   ... Joe, W4TV
 

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of wayne burdick
> Sent: Friday, August 01, 2008 1:18 AM
> To: Elecraft Reflector
> Subject: [Elecraft] K3: ESSB firmware released to field testers
>
>
> I released MCU revision 2.23 to our K3 field-test group earlier this
> evening, making our promised July deadline for ESSB (Extended Single
> Sideband). The maximum ESSB transmit bandwidth is about 4 kHz -- this
> is also the WIDTH control limit in SSB mode for receive purposes. A 6
> kHz filter (AM) on the RF board is required to use ESSB, either in RX
> or TX mode.
>
> This revision also includes changes that we hope will eliminate the
> power output difference between LSB and USB.
>
> If all goes well, we'll post revision 2.23 on our web site (as a beta
> release) on Friday.
>
> If you have a 6-kHz filter and would like to get a jump on
> ESSB testing
> (which we'd appreciate), please send me an e-mail and I'll send you a
> .zip file with this firmware revision.
>
> 73,
> Wayne
> N6KR
>
> ---
>
> http://www.elecraft.com
>
> _______________________________________________
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>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com

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[wayne burdick]

Joe Subich, W4TV wrote:

>> A 6 kHz filter (AM) on the RF board is required to use ESSB,
>> either in RX or TX mode.
>
> What about the FM filter for transmit and receive?  It's better
> than the typical 20 to 40 KHz wide 70 MHz filter in other rigs.

Hi Joe,

We do plan to allow the FM filter to be used for AM and ESSB
eventually. But this will require additional firmware changes and a lot
of careful testing. I have several other tasks to complete before I can
get to it.

73,
Wayne
N6KR

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http://www.elecraft.com

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