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Re: [ELECRAFT]K2

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vk2rq

Re: [ELECRAFT]K2

(looks like the message only came to me, but was intended for a wider audience, so I’ll reply to the Elecraft list)

If you followed the procedure “exactly like described in the manual”, then this will get you on air, but may not give the optimum result. You should use Spectrogram or something similar, so you can visually that it has been set up properly. There is some information on doing this here:
http://www.w3fpr.com/step_3.html <http://www.w3fpr.com/step_3.html>

73, Matt VK2RQ

> On 3 Jan 2015, at 6:35 am, Behiels jean-Pierre <[hidden email]> wrote:
>
> <image001.jpg>
>
>
> Hi K2 members and users;
>
> Majory I like to receive some impressions and experiences from other K2 users.
> I bought quit a year ago a K2 kit,witch operates fabulous no matter about that.
> But after playing around a while in CW and SSB I like to talk about my experiences around the receiving signals !
> I now,the K2 above all is a CW radio not a SSB radio ,some guys told me before (I hope to is true,correct me if I am wrong hi )
> Every time I switch between CW and SSB mode I do have the idee I receive a lot more on SSB
> I always receive the impression that the bandwidth on CW is to small for confortable listening to CW signals ?
> When I switch to SSB and tune to the same received signal,it sounds more comfortable on my ears
> Before giving remarks around,I must told and I can confirm that all my settings have been done “exactly like described in the manual” .
> I have always the impression there is something wrong on CW mode and specially around receiving CW signals.
> I now that the bandwidth of the filters for CW are smaller than those for SSB use ?
> It always could be possible that I have not any confidance with those manner of receiving signals.
> But I do play CW more than 35 years now hi..
> But I must say,I like more the CW receiving signals on a old FT1000D than on my K2 ?
> I do hear a lot of more signals in SSB mode,also from nabers behind and around the band.
> Also tune-in exactly on a CW signal is more easyer in SSB than in CW mode due the fact of bandwidth !!.
> In CW I loose very quick the CW signal by tuning on the VFO dial !!
> The CW signal dissepears quickly by turning around,this is somethimes difficult by very small signal strengths.
> In SSB I do have not this matter,I found every signal very quickly back even when spotted on a wrong DX cluster frequency hi hi (what happens somethimes by use of a DX cluster)
> I easy loose somethimes a CW station and it is difficult to find it again but turning around even with the dial is his smallest tuning range.
> I am quit sure there is nothing around about failures or so,on my homebuild K2 kit but I found this sometimes reason to some confusion by listening the CW small signals
> I am curious of some K2 users have the same impressions ?
> And of couse I am not God but it could always be possible that I have do something wrong in the allignement of the filters or so.
> This last depense on,how I have understood the allignement procedure correctly !!!
> Behind this story I stay a big Elecraft fan nothing about that,it stays for my a fabulous and well engineered radio and building kit !!
>
> Happy new year to the whole Elecraft team and members and users.
>
>
> 73’s Jean ON4AEF.

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Don Wilhelm-4

Re: [ELECRAFT]K2

Jean,

It sounds like the variable width filters are always narrow or that you
have some other filter problem. The easiest way to understand what is
happening is to use Spectrogram to observe the filter passband. Go to
my website www.w3fpr.com and you can find links to 2 freeware versions
of Spectrogram near the bottom of the opening page. If you are running
Linux, it will run under WINE. If you are running a MAC, you will have
to find an alternate audio spectrum analyzer.

You could do a quick check on the variable filter without Spectrogram.
Measure the voltage on D31, D31, D32, and D33 as you change from one CW
filter to another. If the voltage is always zero or does not change,
then the control voltage to the filter is not working (zero voltage will
mean that the filter width will always be very narrow).

One temporary work-around is to use the OP1 filter for wide CW
reception. Change the CW FL1 filter to OP1 and use the same BFO
settings that you have set for SSB FL1. CW is LSB and CW REV is USB.

73,
Don W3FPR

On 1/3/2015 6:40 AM, Behiels jean-Pierre wrote:

>
> Hi K2 members and users;
>
> Majory I like to receive some impressions and experiences from other
> K2 users.
>
> I bought quit a year ago a K2 kit,witch operates fabulous no matter
> about that.
>
> But after playing around a while in CW and SSB I like to talk about my
> experiences around the receiving signals !
>
> I now,the K2 above all is a CW radio not a SSB radio ,some guys told
> me before (I hope to is true,correct me if I am wrong hi )
>
> Every time I switch between CW and SSB mode I do have the idee I
> receive a lot more on SSB
>
> I always receive the impression that the bandwidth on CW is to small
> for confortable listening to CW signals ?
>
> When I switch to SSB and tune to the same received signal,it sounds
> more comfortable on my ears
>
> Before giving remarks around,I must told and I can confirm that all my
> settings have been done “exactly like described in the manual” .
> I have always the impression there is something wrong on CW mode and
> specially around receiving CW signals.
>
>

Bill Frantz

Re: [ELECRAFT]K2

On 1/3/15 at 6:00 AM, [hidden email] (Don Wilhelm) wrote:

>If you are running a MAC, you will have to find an alternate audio spectrum analyzer.

cocoaModem has a spectrum display in its Window->Config panel
covering about 0 to 2800 Hz. I don't know if this will do the
job, but the cost is right.

73 Bill AE6JV

---------------------------------------------------------------------------
Bill Frantz |"After all, if the conventional wisdom was
working, the
408-356-8506 | rate of systems being compromised would be
going down,
www.pwpconsult.com | wouldn't it?" -- Marcus Ranum

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Please help support this email list: http://www.qsl.net/donate.html
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