K3 Preliminary Specifications

[Don Rasmussen]

So you don't want ANY phone calls or e-mails about
specs bacause you're busy with the rollout?

Just say so if that's it!

;-)


[Elecraft] K3 Preliminary Specifications
On our K3 page, you'll now find a link to a .pdf
version of the K3's  preliminary specs. We'll add an
HTML version, too, probably next week. Any of these
specs may change pending further testing or design
changes.

PLEASE don't call or e-mail with questions about the
specs. We'll add or update specs as time permits.
Discussion about the specs is fine, of course and
we'll be diligently reading the reflector. But I'd
like to ask in advance that any *arguments* about
specs be taken off-line, so  Eric (our reflector cop)
doesn't have to put the hammer down  :)

Comment about RX specs:

Receive dynamic range (IMDDR3) is shown for 5 to 20
kHz offsets at present, with the 400-Hz INRAD filter.
We're trying to be conservative, because testing
organizations may get slightly different results due
to variations in equipment and procedures. Our own
tests, conducted at three separate locations,
consistently show 102 to 105 dB at 5 kHz. We also
didn't list 2 kHz offset performance yet, because
we're carefully characterizing all filters. Typically,
we're seeing low to mid 90's on all filters.
(Measuring the K3's dynamic range has been a challenge

because it's higher than anything we've dealt with
before. We've had to beef up our test gear to handle
it.)

Again, please, NO phone calls or e-mails about specs
-- this will just slow down the engineering and
support staff. We're dealing with many details right
about now, as you can imagine.

Thanks!

73,
Wayne
N6KR

http://www.elecraft.com


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[Craig Rairdin]

I see the CW rise/fall time and the adjustable VOX and break-in delays, but
the delay spec I'm looking for is the delay between now and when my card
gets charged; then the delay between the card being charged and the truck
arrives in my driveway. :-)

Hangin' in there,

Craig
NZ0R

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[Simon Lewis-7]

All,

Can one of the testers please comment....

My main interest in the K3 is for transverter driving from 10m

Can someone provide info on what birdies if any they find around the 10m
band receiver

My K2 was less than acceptable in this hence the reason it got sold

Is the K3 10m section free ?? Anyone comment?

73 Simon DL4PLM


Simon Lewis
GM4PLM/DL4PLM
http://www.dl4plm.net


-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Don Rasmussen
Sent: Samstag, 21. Juli 2007 00:14
To: Elecraft
Subject: [Elecraft] K3 Preliminary Specifications


So you don't want ANY phone calls or e-mails about
specs bacause you're busy with the rollout?

Just say so if that's it!

;-)


[Elecraft] K3 Preliminary Specifications
On our K3 page, you'll now find a link to a .pdf
version of the K3's  preliminary specs. We'll add an
HTML version, too, probably next week. Any of these
specs may change pending further testing or design
changes.

PLEASE don't call or e-mail with questions about the
specs. We'll add or update specs as time permits.
Discussion about the specs is fine, of course and
we'll be diligently reading the reflector. But I'd
like to ask in advance that any *arguments* about
specs be taken off-line, so  Eric (our reflector cop)
doesn't have to put the hammer down  :)

Comment about RX specs:

Receive dynamic range (IMDDR3) is shown for 5 to 20
kHz offsets at present, with the 400-Hz INRAD filter.
We're trying to be conservative, because testing
organizations may get slightly different results due
to variations in equipment and procedures. Our own
tests, conducted at three separate locations,
consistently show 102 to 105 dB at 5 kHz. We also
didn't list 2 kHz offset performance yet, because
we're carefully characterizing all filters. Typically,
we're seeing low to mid 90's on all filters.
(Measuring the K3's dynamic range has been a challenge

because it's higher than anything we've dealt with
before. We've had to beef up our test gear to handle
it.)

Again, please, NO phone calls or e-mails about specs
-- this will just slow down the engineering and
support staff. We're dealing with many details right
about now, as you can imagine.

Thanks!

73,
Wayne
N6KR

http://www.elecraft.com


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[Tom Hammond-2]

Hi Simon:

At 05:40 07/21/2007, Simon Lewis wrote:

>Can one of the testers please comment....
>
>My main interest in the K3 is for transverter driving from 10m
>
>Can someone provide info on what birdies if any they find around the 10m
>band receiver
>
>My K2 was less than acceptable in this hence the reason it got sold
>
>Is the K3 10m section free ?? Anyone comment?

When I first received my K3, I tuned thru the bands specifically
looking for birdies which I felt might cause reception problems...
e.g. birdies which I COULD find with NO ANTENNA connected and which
were still present when an antenna for that band was connected, and
still strong enough to be a potential problem.

For 10M, I found two spurs:

   29.085.55 MHz  Moderate
   29.661.70 MHz  Strong

I reported them to Wayne and the other Field testers. Wayne
immediately responded,
suggesting that I double-check the physical (mechanical) grounding of
the shield
immediately behind the front panel "sandwich" of PC boards to its
attachment point
on the top-left side of the radio frame.

Sure enough, the screw at that point had not been securely tightened
by the assemblers.

I snugged down the screw at that point and re-checked for birdies on
10M... GONE!  The only birdies I could then hear (no antenna
connected) were completely covered when my 10M yagi was attached
(note: the band was DEAD, and there was no QRM nor QRN present).

NOW... the ONLY birdie which I've found, and which I would classify
as even a possible problem appears around 1.855MHz, and it's not all that bad.

I think you'll be happy.

73,

Tom   N0SS

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