K2 DSP?

[W5CEM]

Getting closer to ordering a K2...the www page says NOW WITH DSP?  Do I order the DSP board or not?  Inquiring minds want to know...

tnx...

cleve/W5CEM

[Andrew Moore-3]

> Getting closer to ordering a K2...the www page says NOW WITH DSP?  Do I
order the DSP board or not?  Inquiring minds want to know...

I've had my K2 for a few years now, no DSP, and do exclusively 40m CW work,
using only the built-in standard filters.  Absolutely no complains and have
never felt the need for the DSP.  I do have the optional audio filter (two
levels of audio filtering), but I never even use them.

That's certainly not to say DSP filter is of no use, and I'm sure I'd use it
if I had it.  But if you're on the fence, you might try it without it at
first, and you can always add it later.

If I remember correctly you may install either the clock/audio filter OR the
DSP, but not both at the same time (but double check on that... it's been
ages since I've looked)

--Andrew, NV1B
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[TR K2 #838]

I have a K2 with both the audio filters and the clock installed.

The clock is useless to me, it doesn't keep time, and it is too hard
to correct the time base and fix the time.  I never use it.  I have
an external clock that sits on top of the K2 and it is visible all
the time when I need it.

The audio filter is useful rarely when the QRM is really bad.  I'm
VERY glad to have it when I need it !!

I've had my K2 for about 10 years and would recommend it to anyone
who doesn't require a stable rig that doesn't drift.  My K2 drifts
about 110Hz from cold to full running, and I run it VERY hard and
VERY hot.  110Hz doesn't bother me at all.  But I do think it might
be an important consideration to someone on "the fence."

Yes, I have the "no drift" updates both to the VFO and the BFO, and
it still drifts 110Hz.

I run an amplifier, Ameritron AL811H and to drive it, I use
50W.  This places extra heat in the KPA100 and increases the
drift.  It wouldn't be a problem for "normal" people, but I'm a rag
chewer on 40M and 10 minute transmissions are not uncommon for
me.  The people I talk to send 10 minute marathons back to me, but it
doesn't cool down sufficiently for the fan to turn off when they do
so.  It runs VERY hot.  So far, no problems.

BTW, anyone who cares to check the "bandplans" at ARRL will find the
"cw portion" of 40 meters is now down to 10KHz.
This is one reason the digital boys are down to 7035.

I regularly find digital boys down on 7030, I was there this morning
for about 30 minutes.  When I find one, I like to plant my 500W
directly on him and make a lengthy QSO.  I recommend this practice to
all CW operators !  We need to OCCUPY our 10KHz and defend it if we
intend to keep it.

TR, K6GC
K2/100/KAT2 S/N 838, Updated to S/N 6XXX
___________________________________

At 01:48 PM 6/23/2010 -0400, you wrote:

> > Getting closer to ordering a K2...the www page says NOW WITH DSP?  Do I
>order the DSP board or not?  Inquiring minds want to know...
>
>I've had my K2 for a few years now, no DSP, and do exclusively 40m CW work,
>using only the built-in standard filters.  Absolutely no complains and have
>never felt the need for the DSP.  I do have the optional audio filter (two
>levels of audio filtering), but I never even use them.
>
>That's certainly not to say DSP filter is of no use, and I'm sure I'd use it
>if I had it.  But if you're on the fence, you might try it without it at
>first, and you can always add it later.
>
>If I remember correctly you may install either the clock/audio filter OR the
>DSP, but not both at the same time (but double check on that... it's been
>ages since I've looked)
>
>--Andrew, NV1B
>______________________________________________________________
>Elecraft mailing list
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>
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[John Ragle]

On 6/23/2010 2:53 PM, W B Reese wrote:
> I regularly find digital boys down on 7030, I was there this morning
> for about 30 minutes.  When I find one, I like to plant my 500W
> directly on him and make a lengthy QSO.  I recommend this practice to
> all CW operators !  We need to OCCUPY our 10KHz and defend it if we
> intend to keep it.
>    
=====

This is the worst piece of nonsense I have read since the resurgence of
interest in AM! Not only is it nonsense, but it is clearly totally
illegal (deliberate interference). I am surprised that the list
moderator let this go through!

John Ragle -- W1ZI

BTW I operate both CW and some of the "other" digital modes.

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[Mike Harris]

G'day,

I assume you don't mean both KAF2 and KDSP2 at the same time.

Regards,

Mike VP8NO

----- Original Message -----
From: "W B Reese" <[hidden email]>
To: <[hidden email]>; <[hidden email]>
Cc: <[hidden email]>
Sent: Wednesday, June 23, 2010 2:53 PM
Subject: Re: [Elecraft] K2 DSP?


>I have a K2 with both the audio filters and the clock installed.

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[Andrew Moore-3]

> I assume you don't mean both KAF2 and KDSP2 at the same time.

I mean the KAF2 and KDSP2 cannot be used at the same time (sorry if it was
unclear).  I just checked the Elecraft site and confirmed that they do use
the same connector.  Choose either the KAF2 or the KDSP2, but not both.

*    "The KAF2 and the KDSP2 (above) use the same connector and can not be
installed at the same time.*"

--Andrew
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[Joe Planisky]

Hi Cleve,

I have a K2 with the DSP option installed.  In my opinion, the KDSP2  
is nice to have but is not essential to get good performance out of  
the K2.   I occasionally use the NR functionality and the built-in  
clock, but rarely use the audio filtering.  I suppose if the K2 was my  
main rig, I might use the DSP features more.  In my case, the K2 is my  
backup and portable rig, so it doesn't get heavy use anymore.

One unique feature of the KDSP2 is that the DSP code for it is open  
source, so you can write your own DSP code for it if that's where your  
interests lie.

Keep in mind that you can always add it later, and used modules do  
show up here from time to time.

73
--
Joe KB8AP

On Jun 23, 2010, at 10:40 AM, W5CEM wrote:

>
> Getting closer to ordering a K2...the www page says NOW WITH DSP?  
> Do I order
> the DSP board or not?  Inquiring minds want to know...
>
> tnx...
>
> cleve/W5CEM
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/K2-DSP-tp5214408p5214408.html
> Sent from the [K2] mailing list archive at Nabble.com.
> ______________________________________________________________
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[Mike Reublin]

W B Reese wrote:

> BTW, anyone who cares to check the "bandplans" at ARRL will find the
> "cw portion" of 40 meters is now down to 10KHz.
> This is one reason the digital boys are down to 7035.
>
> I regularly find digital boys down on 7030, I was there this morning
> for about 30 minutes.  When I find one, I like to plant my 500W
> directly on him and make a lengthy QSO.  I recommend this practice to
> all CW operators !  We need to OCCUPY our 10KHz and defend it if we
> intend to keep it.
>
> TR, K6GC
> K2/100/KAT2 S/N 838, Updated to S/N 6XXX
> ___________________________________
>  

I don't think it's a good idea to promote illegal operations.

Mike NF4L

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[Phil Kane-2]

On 6/23/2010 11:53 AM, W B Reese wrote:

> I regularly find digital boys down on 7030, I was there this
> morning for about 30 minutes.  When I find one, I like to plant
> my 500W directly on him and make a lengthy QSO.  I recommend this
> practice to all CW operators !

  Warren, of all people, I am ashamed to see you say that.  Please
  refer to 47 U.S.C s. 333 to see what the penalty for doing that
  is.  You know who I used to work for.

  Apologies to the list.

--  73 de K2ASP - Phil Kane
    Elecraft K2/100   s/n 5402
    ARRL Volunteer Counsel

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[Bill Coleman-2]

On Jun 23, 2010, at 1:40 PM, W5CEM wrote:

>
> Getting closer to ordering a K2...the www page says NOW WITH DSP?  Do I order
> the DSP board or not?  Inquiring minds want to know...

When I originally built my K2 in 2001, I purchased the KAF2. I never much liked it. The filters were too ringy for my tastes. About the only thing I used was the basic low-pass filter.

I bought the KDSP2 when it came out, and find it eminently useful. On SSB, I have the automatic notch filter on all the time. I also have a progression of audio filters that enhance the usefulness of the OP1 filter. I find that the audio filters really clean up the pattern of the crystal filter on SSB.

For RTTY and CW, I also use the audio filters to clean up the crystal filters, but the crystal filters are much more useful.

I don't have much use for the Noise Reduction modes. Generally signals that are weak enough for me to want it are too weak for it to be effective.

I find the KDSP2 to be invaluable on SSB, and useful on RTTY and CW. I would recommend the KDSP2 for any K2 owner.

Bill Coleman, AA4LR, PP-ASEL        Mail: [hidden email]
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901

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[Bill Coleman-2]

On Jun 23, 2010, at 2:53 PM, W B Reese wrote:

> BTW, anyone who cares to check the "bandplans" at ARRL will find the
> "cw portion" of 40 meters is now down to 10KHz.
> This is one reason the digital boys are down to 7035.
>
> I regularly find digital boys down on 7030, I was there this morning
> for about 30 minutes.  When I find one, I like to plant my 500W
> directly on him and make a lengthy QSO.  I recommend this practice to
> all CW operators !  We need to OCCUPY our 10KHz and defend it if we
> intend to keep it.

RTTY and other digital modes can only be used (in the USA) from 7000-7125 kHz, whereas CW can be used from 7000-7300 kHz.

A lot of Region 1 and Region 3 stations are still limited to 7000-7100 kHz, so you'll find these DX stations running digital modes centered around 7035 kHz.

Those digital operators have every right to operate on 7030 kHz as well as lower in the band. No operator has the right to intentionally interfere with another operation. What you are advocating is exactly that -- intentional interference. It should not be encouraged by any one on any mode.


Bill Coleman, AA4LR, PP-ASEL        Mail: [hidden email]
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901

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