As far I know I cannot see any filter options for the K2, am I correct?
Currently looking at a K2 sn low 4XXX.
It is advertised as It has 1.7kHz, 700Hz, 400Hz and 100Hz filters fitted
.
Is this possible.
Thanks Gavin ZL1BBW
(http://w3fpr.com/) for a link to the free versions of
Spectrogram and tips on adjusting the K2 filter settings for different modes
and desired bandwidths.
73,
Mike, K8CN
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Spectrogram and tips on adjusting the K2 filter settings for different modes
and desired bandwidths.
73,
Mike, K8CN
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Gavin,
As has been explained by a couple others, the K2 filters (other than the
OP1 filter on the KSB2 option board) are entirely user configurable -
you can set the filter width and the filter center frequency as you
desire. You can find information for doing that at my website
Dave,
I am wondering if you have some problem with the crystals in the
variable IF filter.
The variable filter design point is near 500 Hz. It will normally have
attenuation below 200 Hz width and the passband will bet more 'ragged'
above 1 kHz. What I am saying is that you should have a
Petr,
Have you used Spectrogram (or similar) to check the position of the
filter passbands? If not, you should do so and center the filters at
your chosen sidetone pitch.
73,
Don W3FPR
On 11/4/2010 12:48 PM, ok1rp wrote:
Hi,
I would like to ask for help. My K2 #4800 works fine but I
.
Filter:
1000Hz -90 (ref)
700Hz -90
400Hz -92
200Hz - 94
FWIW.
Regards,
Mike VP8NO
- Original Message -
From: Curt rhule...@comcast.net
To: elecraft@mailman.qth.net
Sent: Thursday, November 04, 2010 10:37 PM
Subject: Re: [Elecraft] [K2] Filters attenuation
Yes, mine attenuates
Mike,
Your results are not all that abnormal. Most do not begin to encounter
attenuation until less than 400 Hz, so yours is slightly worse off than
normal in that regard - but then I usually consider 2 dB to be within
measurement error range.
However, I was concerned about those who said
@mailman.qth.net
Sent: Friday, November 05, 2010 3:12 PM
Subject: Re: [Elecraft] [K2] Filters attenuation
Mike,
Your results are not all that abnormal. Most do not begin to
encounter
attenuation until less than 400 Hz, so yours is slightly worse off
than
normal in that regard
Hi,
I would like to ask for help. My K2 #4800 works fine but I realized the
narrower filters have attenuation. I pre-set FL1200Hz, FL2400Hz and
FL3700Hz but with FL1 I recognised too much attenuation which degrading the
reception of weaks sigs. Is there something which I am doing wrong please?
I dunno about the loss you are seeing but I've measured about 8 dB of
loss in my K2 at 200 Hz vs 1 kHz BW. That does strike me a quite a bit
of loss. I just don't use the narrow filters often. I know of at least
one other K2 that has similar loss. Anyone else?
73 de dave
ab9ca/4
On
Dave,
yes I am confirming it is the attenuation which I am talking about...
When I am decreasing BW from 1.5k to 700Hz there is not noticeable att
(which means it's aprox. less then 3dB) but by going to 400Hz or even to
200Hz I hear big att which can be like You said 8dB or so.
Anybody else has
Yes, mine attenuates but haven't bothered to measure it. Strangely, the 700
Hz seems worse than the narrower filters.
Curt KB5JO
I dunno about the loss you are seeing but I've measured about 8 dB of
loss in my K2 at 200 Hz vs 1 kHz BW. That does strike me a quite a bit
of loss. I just don't
Petr,
I measured mine at 500 Hz a few years ago but never wrote down the
number. I do remember being surprised at how much it was. I use a wider
filter most of the time and only go to the narrowest when there is
substantial qrm in the passband; for just the reason you mention.
73,
Lenny
After several years of faithful service, my K2/100 (with KDSP2 and KSB2) has
developed a perplexing malady. The crystal filter passband will not adjust to
center on a 600hz sidetone. As you adjust the filters towards 600 hz using
Spectrogram (say OP1), the filter shape degrades and then
Howard W. Ashcraft wrote:
When I started to set the filters, however, I could not get them
within range. As noted above, I can not shift the passband to cover
a 600hz sidetone. The filters appear to center around 900-1000 hz.
I have attempted to set the filters back to my prior CAL FIL BFO
I hope you are not trying to CENTER OP1 on 600 Hz. That's not right. You
want the skirt to fall to zero around 200 Hz (left) and around 3K (right).
There may be nothing wrong at all. If you did center it, you'd have
reception on both sides of zero-beat.
Dan / WG4S / K2 #2456
snip
The crystal
Howard,
Dan Barker's response was likely 'on target'.
It is entirely possible that you have gotten the BFOs set to the wrong
sideband. The CW filters should be at a lower BFO frequency than the
CWr frequencies, and likewise the LSB filters should be lower than the
USB filters.
I suggest
To: Howard W. Ashcraft
Cc: elecraft@mailman.qth.net; [EMAIL PROTECTED]
Subject: Re: [Elecraft] K2 Filters Will Not Align Properly
Howard,
Dan Barker's response was likely 'on target'.
It is entirely possible that you have gotten the BFOs set to the wrong
sideband. The CW filters should be at a lower
Dan,
I should have been more careful when I said centering around 600hz. 600hz is
set at about the first major peak of OP1 and is very close to the spacing you
describe.
Thanks and 73,
Howard W1WF
K2/100
KX1
*
This communication, including any attachments, is
I've been enjoying operating my K2 for quite a while now - but one thing has
bothered me and that is my alignment of the CW and SSB filters - my main
problem is that I only have a basic understanding of what I'm doing - I feel
I need a better understanding which will result in a better alignment
Bruce, when you tune the guy in FL1, are you tuning him in at the same
pitch as the spot tone?
de w1rt/john
On 2/12/06, rattray [EMAIL PROTECTED] wrote:
I've been enjoying operating my K2 for quite a while now - but one thing has
bothered me and that is my alignment of the CW and SSB filters -
Bruce,
Are you certain that your first filter is set on the correct sideband? It
sounds like it may not be. I suggest that you re-establish your starting
point by using the manual chart of BFO frequencies and set the BFOs as
indicated.
After that, use the noise generator and Spectrogram to
Bruce:
- so I got out my N0SS noise generator and put a new battery in - booted up
the 10 minute Spectrogram program, set it's parameters according to
instructions I printed off the Elecraft Builders' Resources, set markers at
600 2000 hz and turned on the noise generator - then I went
I would like to know if adding a DSP unit to the K2 will make the KAF2 audio
filter obsolete, or if they are used together ?
Also I am curious what others think about the following, starting out with a
K2, which do you think you would add next , the DSP unit or the 100 W option ?
Just got my
To: elecraft@mailman.qth.net
Subject: [Elecraft] K2 Filters
I would like to know if adding a DSP unit to the K2 will make the KAF2 audio
filter obsolete, or if they are used together ?
Also I am curious what others think about the following, starting out with a
K2, which do you think you would add next
On Wed, Apr 20, 2005 at 07:30:12PM +0200, Sverre Holm wrote:
Also I am curious what others think about the following, starting out
with a K2, which do you think you would add next , the DSP unit or the
100 W option ?
If I read you right, your interest is in CW and not SSB, since you
On Oct 13, 2004, at 9:57 PM, Joe - aa4nn wrote:
I wish there was a K2 button you could push to see what filter is
active.
Not me. I just wish the K2 displayed the selected filter all the
time... Of course, that would require more display room.
Bill Coleman, AA4LR, PP-ASELMail:
There is!
Put your finger between XFIL and AGC and press the phantom button. The filter
setting displays without changing anything. I use it all the time.
The book will say to press both buttons at the same time. That's hard to do.
Just press between them instead. I know it's a nit, but a mind
7:19 AM
Subject: Re: [Elecraft] K2 Filters
On Oct 13, 2004, at 9:57 PM, Joe - aa4nn wrote:
I wish there was a K2 button you could push to see what filter is
active.
Not me. I just wish the K2 displayed the selected filter all the
time... Of course, that would require more display room
There IS a button... err... well a 'buttons'... briefly press both [AGC]
and [XFIL] at the same time to see the currently active Xtal Filter.
Availability is dependent upon firmware rev, but was implemented quite a
while back, so most K2's should offer it.
73,
Tom
At 07:19 AM 12/20/04,
Bob said:
I used it after modification to inprove the filter rejection (positive)
and it helped a lot.
But I was not very glad with the results !
CW 1.0 - 0.7 - 0.4 - 0.2
LSB 2.4 - 2.0 - 1.8 - 1.6
USB 2.4 - 2.0 - 1.8 - 1.6
RTTY 1.8 - 1.5 - 1.0 - 0.6
Hi Bob,
I use MixW too. I was
- Original Message -
From: [EMAIL PROTECTED] (Mike S)
Date: Wednesday, October 13, 2004 10:28 pm
Subject: Re: [Elecraft] K2 Filters
At 09:57 PM 10/13/2004, Joe - aa4nn wrote...
I wish there was a K2 button you could push to see what filter is
active.
Push AGC and XFIL together
14, 2004 3:31 PM
To: [EMAIL PROTECTED]
Cc: elecraft
Subject: Re: [Elecraft] K2 Filters
- Original Message -
From: [EMAIL PROTECTED] (Mike S)
Date: Wednesday, October 13, 2004 10:28 pm
Subject: Re: [Elecraft] K2 Filters
At 09:57 PM 10/13/2004, Joe - aa4nn wrote...
I wish
I wish there was a K2 button you could push to see what filter is active. As
it is, any filter button you push advances to the next filter so you are left
with the knowledge of the filter you had been using, so you push the button
three more times to get back to where you were when you wanted
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