: [Elecraft] New beta K3 firmware!
Can I ask ELECRAFT what's next on the list for the K3 firmware improvements
we can expect...
Hi Gordan,
Best guess:
- improved CW decode at all AGC settings
- support for KAT500 antenna switching from the K3
- bug fixes related to remote rig communications (K3
Don't we already have the option to beta the feature to use the FM filter for
AM via macro's. I'm not sure which way to spin the VFO dial for the band
width selection, but the macro seems simple enough to build.
To set to AM with the filter set to 13Khz and needing to go to 6Khz:
MN038; FLx BW
On 9/21/2012 6:40 PM, Wayne Burdick wrote:
The 6 kHz filter band-limits the transmit noise originating from the
DAC and the transmit mixer to a bandwidth appropriate for AM and ESSB
modes. The 15 kHz filter would allow a noise bandwidth over twice as
wide.
In an attempt to quantify this
Thankyou Joe, Excellent examination of the situation.
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joe Subich, W4TV
Sent: Sunday, 23 September 2012 12:23 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] New beta K3
Hi Joe,
Thanks for that analysis! It makes the situation clear to me: The FM filter
will do just fine for AM and ESSB, and I can free up a filter slot for a
narrow CW filter.
Wayne, it would be great to have this option. I hardly ever use ESSB or AM
TX, so I can't really justify having a filter
*Joe,
Thanks for taking the time to conduct the tests.
Now that I understand what the rationale for the request to Wayne, I am of
the same mind also.
As I use the FM filter rarely I would also be able to free up a filter slot
and add an additional narrow filter which would be good for me also.
Gary,
Joe did testing on a sample size of one K3. While manufacturing of K3s
can produce units that behave close to the average, I think it would be
wise to test on a greater number of K3s with different configurations.
In addition some testing of K3s under fault conditions should be done
It might also be interesting to see what happens to the noise pedestal
when audio is added to the equation.
73,
Scott, N9AA
On 9/22/12 6:31 PM, Don Wilhelm wrote:
Gary,
Joe did testing on a sample size of one K3. While manufacturing of K3s
can produce units that behave close to the
It would be very difficult to measure the out of band noise in the
presence of a 100W PEP multi-tone audio signal. Much of the opposite
sideband noise would be masked by amplifier IMD which measures -29 dB
(3rd order) to -51 dB (9th order) relative to PEP in the ARRL lab (QST,
January, 2009).
Joe,
That information on the sample of two is good, but since there is
variation between them, that is reason for me to suggest additional
testing - it takes 3 to vote on the correct answer and several more to
determine an average.
Joe, that was very good work, and the test setup is not
Hi,
Can I ask ELECRAFT what's next on the list for the K3 firmware improvements we
can expect
E72X -Gordan
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Post:
Can I ask ELECRAFT what's next on the list for the K3 firmware
improvements we can expect...
Hi Gordan,
Best guess:
- improved CW decode at all AGC settings
- support for KAT500 antenna switching from the K3
- bug fixes related to remote rig communications (K3/0)
There have also
Any hope for serial command support for the receive equalizer?
AB2TC - Knut
wayne burdick wrote
Can I ask ELECRAFT what's next on the list for the K3 firmware
improvements we can expect...
Hi Gordan,
Best guess:
- improved CW decode at all AGC settings
- support for KAT500
How about allowing use of the FM filter for AM and ESSB transmit?
73,
... Joe, W4TV
On 9/21/2012 11:11 AM, Wayne Burdick wrote:
Can I ask ELECRAFT what's next on the list for the K3 firmware
improvements we can expect...
Hi Gordan,
Best guess:
- improved CW decode at all AGC
*Joe,
I have to ask, why?
In VK we have a 3Khz SSB BW written into our LCD's and yet some folks
consume 10Khz out here on a net which tears up a considerable amount of
spectrum.
What advantage do you see to widen the ESSB?
Not sure I follow your thoughts here, hence the question Joe.
73
*
On
Originally sent direct, was meant for the list.
Actually, we can run up to 8khz bandwidth, with the exception of 16Khz in
the FM segment of 10m, and of course the very very low band. The rules do
change above 10M though depending on your license class. What this means is
you can actually,
I don't know the motivation for the FM filter request, but I will say that here
in the US there are vast expanses of the bands that are mostly unused. For
instance, night after night there isn't a single station between 3600 and 3700
kHz here on the west coast. As another data point, I just
On Sat, Sep 22, 2012 at 7:00 AM, Gary Gregory garyvk...@gmail.com
wrote:
I have to ask, why?
Using the FM filter does no widen ESSB or AM ... the bandwidth of
those modes is determined by the DSP modulator. The only thing
the 8.215 MHz crystal filter does is to provide some additional
The poster who made that request has made it before.
Actually, the width of the transmitted signal should be controlled in
the DSP, so Joe does have a point, but the designers at Elecraft are not
ready to let go of the bandwidth safety net provided by the 6 kHz filter.
Other SDR transmitters can
I see Joe's point exactly to enable the 13k filter for more diverse usage,
which would suit me perfectly instead of 'tricking' the K3 or am/fm use not
just FM. The ESSB is just another thing it does, but the AM is what I want
also.
These last few messages are not being propagated (to me
Hi Gary,
The point is not to widen the SSB but to use the FM crystal filter to limit
it. The DSP does the actual shaping of the TX signal which will still be
the same width regardless of whether you're using the 6kHz filter or the
12.5kHz FM one.
The idea is to be able to use the FM filter for
*Hi Joe,
Thanks for the explanation. I can now 'see' what you meant and it does seem
logical.
I too have all 5 filter slots in use.
'Learning all the time'...:-)
73's Joe and thanks again.
*
On 22 September 2012 07:37, Joe Subich, W4TV li...@subich.com wrote:
On Sat, Sep 22, 2012 at
The 6 kHz filter band-limits the transmit noise originating from the
DAC and the transmit mixer to a bandwidth appropriate for AM and ESSB
modes. The 15 kHz filter would allow a noise bandwidth over twice as
wide.
This in-band noise pedestal could be 20-30 dB above the normal
transmit
This in-band noise pedestal could be 20-30 dB above the normal
transmit noise floor if you were using a lot of mic gain and/or
compression. If you were using high power in these modes, your signal
would now be much more likely to bring up the receive noise floor at
nearby stations.
Is
From: Gary Gregory garyvk...@gmail.com
To: Joe Subich, W4TV li...@subich.com
Cc: elecraft@mailman.qth.net
Sent: Friday, September 21, 2012 6:19:29 PM
Subject: Re: [Elecraft] New beta K3 firmware!
*Hi Joe,
Thanks for the explanation. I can now 'see' what you
Seconded. I would love to have room for an 1.0 (for digimodes) and 200
(weak/QRM CW) filter in addition to my lineup of FM, AM, 2.8, 2.1, and 400.
73, Thomas M0TRN
On 22 September 2012 00:38, VE3GNO Daniel yo3...@yahoo.com wrote:
Hi All,
I dream one day to see Elecraft building some kind of
Maybe I'll put the feature in and let you be my guinea pig, Joe. One
complaint about noise bandwidth and it comes back out ;)
Wayne
On Sep 21, 2012, at 4:20 PM, Joe Subich, W4TV wrote:
This in-band noise pedestal could be 20-30 dB above the normal
transmit noise floor if you were using a
My feeling is that if you have the 8 pole 2.8 kHz filter installed, the
2.1 kHz filter is probably redundant for vast majority of applications.
73,
Scott, N9AA
Seconded. I would love to have room for an 1.0 (for digimodes) and 200
(weak/QRM CW) filter in addition to my lineup of FM, AM, 2.8,
I couldnt disagree more, I use the 2.1k most followed by the 1.8k in
ssb. I never see/hear a need to go wider than 2.1k other than to
appreciate Johnny Broadcasters new $1000 studio mic. I use the 2.8k std
req for TX. On 22/09/2012 1:59, Scott Manthe wrote: My feeling is that
if you have the
I would use the FM filter for AM receive and the AM filter for ESSB
receive. I used to do it all the time for listening to shortwave broadcasts
on my JRC NRD-535. If the are no adjacent channel signals, you get full
fidelity.
Don NA6Z
K3 KPA500
On Fri, Sep 21, 2012 at 2:57 PM, Adrian
Blush, I just read the other thread with the same subject line. I gotta
stop thinking IF filters. Yep, you'd need to play with the DSP bandwidth
too.
On Fri, Sep 21, 2012 at 9:11 PM, Don Putnick don.putnick.n...@gmail.comwrote:
I would use the FM filter for AM receive and the AM filter for ESSB
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