[Elecraft] K3: ESSB firmware released to field testers

[Joe Subich, W4TV]

> 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: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] 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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