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near band edge?

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Ian Stirling, G4ICV, AB2GR

near band edge?

I just had two QSOs with my K2, the closest to any band edge
I've ever ventured in nearly 28 years of operating.
I heard F6FAI calling CQ and my K2 frequency was 7.0005 MHz.
I trusted that Jean was inside the band and I had set my
K2's master oscillator using WWV. Then Bill, G4EHT called me
zero beat on that frequency.
Anyone know the bandwidth of transmitted CW at about 20 wpm
on an up-to-date K2?

Ian, G4ICV, AB2GR, K2 #4962, LP-100 #278
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Bob & Debbie Fish

Re: near band edge?

Hi Ian,
I think it is about 3 khz. So I never go closer than 1.5khz. I suppose
if you were on upper side band cw you could cosy right up to the lower
edge of the band and the inverse with lower side band on the upper edge
but I have never been sure enough to get that close. I am sure some one
will either confirm or correct my answer if it is wrong.

Bob K6GGO

Ian Stirling wrote:

> I just had two QSOs with my K2, the closest to any band edge
> I've ever ventured in nearly 28 years of operating.
> I heard F6FAI calling CQ and my K2 frequency was 7.0005 MHz.
> I trusted that Jean was inside the band and I had set my
> K2's master oscillator using WWV. Then Bill, G4EHT called me
> zero beat on that frequency.
> Anyone know the bandwidth of transmitted CW at about 20 wpm
> on an up-to-date K2?
>
> Ian, G4ICV, AB2GR, K2 #4962, LP-100 #278
> --
> _______________________________________________
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>

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Leigh L. Klotz Jr WA5ZNU

Re: near band edge?

Administrator

In reply to this post by Ian Stirling, G4ICV, AB2GR

The old rule was 5xWPM in Hz for a properly-shaped CW signal. I
remember studying this for my Novice.
Is that still accepted?
Leigh/WA5ZNU
On Tue, 6 Feb 2007 1:47 pm, Ian Stirling wrote:
> Anyone know the bandwidth of transmitted CW at about 20 wpm
> on an up-to-date K2?
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Dan Romanchik KB6NU

Re: near band edge?

W5ALT says that the maximum bandwidth for a CW signal (assuming
you're modulating with a square wave) is 26 x wpm (http://
www.comportco.com/~w5alt/cw/cwindex.php?pg=5). So that makes the
bandwidth--at most--520 Hz. I would assume that the K2 shapes the
signal, so the bandwidth should be narrower.

73!

Dan KB6NU
----------------------------------------------------------
CW Geek and MI Affiliated Club Coordinator
Read my ham radio blog at www.kb6nu.com
LET'S GET MORE KIDS INTO HAM RADIO!

On Feb 6, 2007, at 5:05 PM, Leigh L Klotz, Jr. wrote:

> The old rule was 5xWPM in Hz for a properly-shaped CW signal. I
> remember studying this for my Novice.
> Is that still accepted?
> Leigh/WA5ZNU
> On Tue, 6 Feb 2007 1:47 pm, Ian Stirling wrote:
>> Anyone know the bandwidth of transmitted CW at about 20 wpm
>> on an up-to-date K2?
> _______________________________________________
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Bob & Debbie Fish

Re: near band edge?

Sorry Guys,
I must have had ssb stuck in my head even though I knew Ian had asked
about cw. Thanks for the polite correction.
This could mean my wife is right about my listening.

Bob K6GGO

Dan KB6NU wrote:

> W5ALT says that the maximum bandwidth for a CW signal (assuming you're
> modulating with a square wave) is 26 x wpm
> (http://www.comportco.com/~w5alt/cw/cwindex.php?pg=5). So that makes
> the bandwidth--at most--520 Hz. I would assume that the K2 shapes the
> signal, so the bandwidth should be narrower.
>
> 73!
>
> Dan KB6NU
> ----------------------------------------------------------
> CW Geek and MI Affiliated Club Coordinator
> Read my ham radio blog at www.kb6nu.com
> LET'S GET MORE KIDS INTO HAM RADIO!
>
>
>
> On Feb 6, 2007, at 5:05 PM, Leigh L Klotz, Jr. wrote:
>
>> The old rule was 5xWPM in Hz for a properly-shaped CW signal. I
>> remember studying this for my Novice.
>> Is that still accepted?
>> Leigh/WA5ZNU
>> On Tue, 6 Feb 2007 1:47 pm, Ian Stirling wrote:
>>> Anyone know the bandwidth of transmitted CW at about 20 wpm
>>> on an up-to-date K2?
>> _______________________________________________
>> Elecraft mailing list
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>> Subscriber Info (Addr. Change, sub, unsub etc.):
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>>
>
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Ian Stirling, G4ICV, AB2GR

Re: near band edge?

In reply to this post by Dan Romanchik KB6NU

On Tuesday 06 February 2007 17:33, Dan KB6NU wrote:
> W5ALT says that the maximum bandwidth for a CW signal (assuming
> you're modulating with a square wave) is 26 x wpm (http://
> www.comportco.com/~w5alt/cw/cwindex.php?pg=5). So that makes the
> bandwidth--at most--520 Hz. I would assume that the K2 shapes the
> signal, so the bandwidth should be narrower.

Thanks Dan, Leigh and Bob -
I think my QSO and my QSOees were inside the band.

73,
Ian, G4ICV, AB2GR, K2 #4962, LP-100 #278
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