Date   

Elecraft reflector down???

Jos� Nunes
 

Hi

I cannot access Elecraft Reflector on
http://www.ac6rm.net/mailarchive/html/elecraft-list/2007-07/index.html

or better the last message I received is from the 6 of July.

Anyone else experience the same problem?

73
José Nunes
CT1BOH


Re: [Elecraft_K3] K3 and DRM reception

Leigh L Klotz, Jr.
 

I think you just need the FM 15KHz filter, right?
Leigh/WA5ZNU

On Mon, 16 Jul 2007 1:40 pm, tomczykw wrote:
I am glad that this subject has generated some comments.
I intend to receive some broadcast band DRM transmissions and it
indeed requires some 12 kHz receiver bandwidth and an IF output.
Perhaps someone from Elecraft could comment about it.

Tom, VK2OE




Yahoo! Groups Links



K3 and DRM reception

tomczykw <wojiech.tomczyk@...>
 

I am glad that this subject has generated some comments.
I intend to receive some broadcast band DRM transmissions and it
indeed requires some 12 kHz receiver bandwidth and an IF output.
Perhaps someone from Elecraft could comment about it.

Tom, VK2OE


Re: Moosehorn Amateur Radio Club K3-100w Demo

bigfork04
 

--- In Elecraft_K3@yahoogroups.com, Paul@... wrote:


Thanks, your pictures are alot better quality.


I will try and post some pictures
of the unit opened up on the web site.
www.N4LCD.com/k3


Re: [Elecraft_K3] Re: K3 and DRM reception

Rick <mrfarm@...>
 

I was thinking the same thing. Any standard HF radio can run the digital modes such as WinDRM since it fits into an SSB passband.

The commercial reception of DRM (Digital Radio Mondiale) requires tapping a low frequency IF and doing further processing. DRM is at least 10 kHz wide and can not be used on HF ham frequencies, even if we had the technology to do it. A few rigs or receivers are designed to do this such as the Flex Radio DSP transceivers.

73,

Rick, KV9U


ab2tc wrote:

Hi,

I wonder if Tom was referring to "real" DRM used by broadcasters. The
ham radio DRM is a downsized version using less bandwidth. A real DRM
signal takes up at least 10kHz, maybe more. I have WinDRM installed
and have occasionally decoded signals at 14236. Frankly the audio
quality is miserable; I have no idea why this should become a popular
mode.

Knut - AB2TC


Re: K3 and DRM reception

ab2tc
 

Hi,

I wonder if Tom was referring to "real" DRM used by broadcasters. The
ham radio DRM is a downsized version using less bandwidth. A real DRM
signal takes up at least 10kHz, maybe more. I have WinDRM installed
and have occasionally decoded signals at 14236. Frankly the audio
quality is miserable; I have no idea why this should become a popular
mode.

Knut - AB2TC

--- In Elecraft_K3@yahoogroups.com, "Joe Stofko" <wb1aiu@...> wrote:

Hi Tom,

If you haven't already... check out http://n1su.com/windrm/
With the built-in audio interface on the K3... a PC and free
WinDRM sofware, I think you would be well on your way
to exploring this new mode.

73,
Joe - WB1AIU

--- In Elecraft_K3@yahoogroups.com, "tomczykw" <wojiech.tomczyk@>
wrote:

I wonder if K3 will be suitable for DRM reception or perhaps can be
modified in such a way that DRM stations can be received.
Tom, VK2OE


Re: K3 and DRM reception

Joe Stofko <wb1aiu@...>
 

Hi Tom,

If you haven't already... check out http://n1su.com/windrm/
With the built-in audio interface on the K3... a PC and free
WinDRM sofware, I think you would be well on your way
to exploring this new mode.

73,
Joe - WB1AIU

--- In Elecraft_K3@yahoogroups.com, "tomczykw" <wojiech.tomczyk@...>
wrote:

I wonder if K3 will be suitable for DRM reception or perhaps can be
modified in such a way that DRM stations can be received.
Tom, VK2OE


K3 and DRM reception

tomczykw <wojiech.tomczyk@...>
 

I wonder if K3 will be suitable for DRM reception or perhaps can be
modified in such a way that DRM stations can be received.
Tom, VK2OE


Re: [Elecraft_K3] Moosehorn Amateur Radio Club K3-100w Demo

Paul@...
 





I will try and post some pictures
of the unit opened up on the web site.

www.N4LCD.com/k3





Filter data?

N1EU <barry.n1eu@...>
 

Is the plot for the stock ssb filter posted anywhere? I see the
8-pole plots at http://www.elecraft.com/K3/K3_8_pole_plots.htm but I'd
like to compare the 2.7khz and 2.8khz plots.

Also, the filter DR info hasn't been posted yet, correct? I saw a
post back in June saying it would be posted in a few days but don't
remember ever seeing it.

Thanks & 73,
Barry N1EU


Moosehorn Amateur Radio Club K3-100w Demo

bigfork04
 

What a great radio to say the least. N6TRE brought the K3-100w
without auto tuner to our Hamfest today and talked about using it and
answered questions. N6TRE is a beta tester and does not work for
Elecraft.
He indicated that this transceiver will be as good or better then any
Amateur radio like the more expensive ones i.e. $10,00.00. The dynamic
range is extremely good. He also opened the radio up by removing the
top and bottom. There is not much in it to look at. The heat sink is
the biggest part and looks to be the heaviest also. They have been
running it at 125W output with no heat build up. They ran it as a 10
meter beacon for 2 hours at full power and indicated that it ran
without any problems. They have been using it and supplying feed back
to the design engineers while they are testing it. It appears
Elecraft is full bore on getting this radio right. KL7RA also
indicated that his use of it on CW proved to back up N6TRE comment
about the dynamic range.
This radio is going to be the top contesting rig to have. It appears
the first run is going to be about 250 units. The question was asked if
delivery is on track and N6TRE could not answer the question as he did
not know. This rig had the 2.8Khz 8 pole filter in it and N6TRE liked
the filter as the standard filter of 2.7Khz was not available when it
was shipped up to Alaska late last week. I would like to thank
Elecraft for getting this radio up to Alaska in time for the HamFest,
they shipped it early to do this. I will try and post some pictures
of the unit opened up on the web site. Kl7RA also commented that
there will be a learning curve on getting up to full use of this
radio. You won't just open the box and power it up and be talking.
They had a beta copy of the manual but I did not get a chance to look
at it. I have one ordered but ordered late, so I am in the Oct.
shipping schedule.
It's going to define Amateur radio for the for-see-able future and it
will be from the USA, with the Elecraft great customer service.
No I am not working for Elecraft just very impressed with the radio
and with the responses form talking to the factory about my order.

KL1J
Jim


Re: Are there any really news?

bill_w4zv <w0zv@...>
 

--- In Elecraft_K3@yahoogroups.com, "Daniel" <schaeffler@...> wrote:

Are there any really news about the new K3? Comparison data between
the K3 and other
transceivers? Tech. data? Lab data?
http://lists.contesting.com/pipermail/topband/2007-June/026875.html

73, Bill


Re: Are there any really news?

Allan
 

--- In Elecraft_K3@yahoogroups.com, "Daniel" <schaeffler@...> wrote:

Hi folks

Are there any really news about the new K3? Comparison data between
the K3 and other
transceivers? Tech. data? Lab data?

All are talking about the ergonomic, thats it?

Daniel, HB9DDS
Patience, patience. Units are due to start shipping at the end of the
month.. which is 2 weeks away. Beta testing and field checks are
going on right now. You waited this long, wait a little longer.
Enough of the conjecture.. real info is on its way,

Allan, AE2J


Re: Are there any really news?

Joseph Stofko <wb1aiu@...>
 

Daniel,

    I expect that technical specifications and "hard numbers"
will not be available until the first production run shipments
leave the factory.

   There have been some hints realeased, with figures
measured in the lab. these can be found by perusing posts
here and elsewhere. Also, plots for the roofing filters are
available on the Elecraft sight.

  Meanwhile, we all sit.. and... wait !

73,  Joe - WB1AIU
 


Are there any really news?

Daniel <schaeffler@...>
 

Hi folks

Are there any really news about the new K3? Comparison data between the K3 and other
transceivers? Tech. data? Lab data?

All are talking about the ergonomic, thats it?

Daniel, HB9DDS


Re: K3 Beta testers ???

josephlevy
 

For those of you who are not contesters, but are
interested in the K3, a couple of the beta testers
have posted some general remarks on CQ-Contest
recently. This link will take you to the July Archive.
You can scan for the appropriate topic.

Cheers,
Julius
n2wn

http://lists.contesting.com/_cq-contest/2007-07/threads.html



--- In Elecraft_K3@yahoogroups.com, "wb8yqj" <wb8yqj@> wrote:

Is there anyone on this list that has an early release K3 that
wouldn't
mind answering some simple questions about the radio for list
members?


Re: K3 Beta testers ???

Joe Stofko <wb1aiu@...>
 

Hello Don,

There have been a couple of posts, with links to
other forums, on the Elecraft reflector. Check the archives
from a week or two back. I believe that the thread was
regarding "ergonomics". There were comments from at least
two Beta testers.

Good luck.

Joe - WB1AIU

--- In Elecraft_K3@yahoogroups.com, "wb8yqj" <wb8yqj@...> wrote:

Is there anyone on this list that has an early release K3 that
wouldn't
mind answering some simple questions about the radio for list
members?


Re: [Elecraft_K3] K3 Beta testers ???

Joe-aa4nn <aa4nn@...>
 

Simple and complex questions have been answered
by the FAQ at www.elecraft.com
 
de Joe, aa4nn
 

----- Original Message -----
From: wb8yqj
Sent: Thursday, July 12, 2007 12:05 AM
Subject: [Elecraft_K3] K3 Beta testers ???

Is there anyone on this list that has an early release K3 that wouldn't
mind answering some simple questions about the radio for list members?


K3 10 watt to be in Alaska on July 14

bigfork04
 

The K3 10 watt transceiver will be in Alaska during next Saturdays
contest and will be Demo at the Moosehorn Amateur Radio Clubs Hamfest.
http://www.kl7uw.com/Hamfest.htm

N6TR will be using the rig for beta testing during the contest. They
will be using KL7RA contesting homestead in Kenai.
I will post any information I get from the hour long presentation.

KL1J


Re: Rig ergonomics and performance comparison

Eric Swartz - WA6HHQ, Elecraft
 

In multi transmitter situations I would expect that external bandpass
filters would still be required, as they are for most rigs. In some
cases you might be able to get away without them, but the external
units are very high Q and probably a little narrower than the rig's
internal bandpass filters, so they should offer even better out of
band rejection.

73, Eric
P.S We're extremely busy getting the K3 ready to ship so I may not
always be able to reply to postings and emails.




CR wrote:

So whats the performance of the K3's bandpass filters like? Would
you still require outboard bandpass filters for contest environment
if you require further second harmonic suppression?

Craig

-- In Elecraft_K3@yahoogroups.com
<mailto:Elecraft_K3%40yahoogroups.com>, "Eric C. Swartz"
<wa6hhq_lists@>
wrote:

The K3 transmits through both bandpass filters (before the final
amplifier stages) and through low pass filters after the PAs.

The bandpass filters do an excellent job of removing out of band
noise
generated in earlier stages. The low pass filters afer the PA remove
any hamonic energy generated in the final PA stages.

73,
Eric WA6HHQ
Elecraft

--- In Elecraft_K3@yahoogroups.com
<mailto:Elecraft_K3%40yahoogroups.com>, "CR" <vk3he@> wrote:

Hi Chris

I was incorrect, the K3 uses lowpass filters and not bandpass
filters
in the TX chain, so they are still needed. However with the great
IMD dynamic range figures that most are expecting its only in
cases
where you have 2 transmitters on the same band where the
receiver will
be challenged. Until we see what the phase noise performance
of the K3
is like we can only presume that it will be good and this wont
be a
issue.

I do believe that the W3NQN filters have very good
performance, they
are so good in fact that its possible to use a dual band yagi
on the
same boom and receive on one band while another station is
transmitting on another band.

Most people use the bandpass filters to null the second harmonic.
Several stations use stubs along with these filters for added
attenuation. Phase noise especially if its very bad will also be
reduced, however i would think that most multi multi contest
stations
would avoid using radios with poor phase noise performance. If
a receiver is phase noisy it follows that the transmitter would
probably also have a bad case of phase noise on transmit.


I feel confident that the K3 will deliver.

Craig

--- In Elecraft_K3@yahoogroups.com
<mailto:Elecraft_K3%40yahoogroups.com>, G3SJJ <g3sjj@> wrote:

Craig, I think I am correct in saying that the various bandpass
filters
available, eg ICE, Dunestar were created to reduce tx phase
noise
from
adjacent current design radios in MO and SO2R setups. I have a
pair of
the Dunestar 600s here and they do just that, although antenna
separation plays a big part also. We used them for several years
in our
GU8D operation in the IOTA Contest and they were very effective.

One of the things that has impressed me in the K3 discussions
was the
in-band close-in figures. A couple of years ago we did some
in-band
checks here using 2 FT1kMPs with roofing filters and tx amps. I
haven't
got the actual data to hand but with mono band antennas on 20m
separated
by 70m, we were able to operate SSB and CW to within about
100KHz. I
wouldn't have thought the Dunestars would have made any
difference
but I
honestly cannot remember.

I'm looking forward to getting my K3 shortly to do some more
tests. In
particular at the beginning of October we have the RSGB 21/28MHz
Contest
which I won last year using just the MP. This year I am
intending to
run
SO2R with the MP and K3 and will be looking to do in-band dual
mode as
well as dual band. That should be interesting.

73 Chris G3SJJ


CR wrote:

It will be interesting to see if the Elecraft K3 needs
external
bandpass filters when used in a multi multi contest
environment.
Considering what the cost is for a full set of W3NQN
filters, it
certainly make the K3 a popular if you dont have this
additional
cost
or weight to carry around on an expedition or in contest
station.

I also wonder if a Tracking Preselector will become a future
option
for the K3. The Yaesu U tune preselector is a great feature
although
old hat! However if the K3's front end is bullet proof it
would be
hard to justify the additional expense and marginal
performance gain
from a preselector. When bad IMD, Keyclicks and phase noise
dominate
the value of such filters is questionable. However it might be
handy
in places like Europe. Its going to be torturous operating a
perfect
receiver like the K3 and hearing the good, the bad and the
ugly
knowing very well its not your receiver when you hear the bad!

Such is the price of perfection!

Craig
VK3HE

--- In Elecraft_K3@yahoogroups.com
<mailto:Elecraft_K3%40yahoogroups.com>
<mailto:Elecraft_K3%40yahoogroups.com>, "Jon Pellant" <w1jp@>
wrote:

Thanks for your feedback. I trust my gut instincts
sometimes and
my gut
made me blindly order a K3. I trust I won't be
dissappointed.

Jon
w1jp

--- In Elecraft_K3@yahoogroups.com
<mailto:Elecraft_K3%40yahoogroups.com>
<mailto:Elecraft_K3%40yahoogroups.com>, Rick <mrfarm@> wrote:

Assuming you like the ergonomics of a given rig, the one
parameter
that
I look at the most is the close-in IMD3 (Third Order
Intermodulation
Distortion).

Currently <snip/>