[Elecraft] Quick Way To Accurately Measure K3s CW Filter Offset?

[Eric Swartz - WA6HHQ, Elecraft]

Also make sure your sidetone pitch setting is where you like it.
Eric
/elecraft.com/

On 2/18/2017 9:00 AM, Nr4c wrote:
> The 409 is zero.
>
> Are the passband centered on display?
>
> Sent from my iPhone
> ...nr4c. bill
>
>
>> On Feb 18, 2017, at 3:30 AM, Dave AD6A <dave at ad6a.com> wrote:
>>
>> Hi Folks,
>>
>>
>>
>> I'm having a go at my first CW contest for many years (and boy, am I
>> rusty!!).
>>
>> I've worked several new countries already, BUT, I noticed my K3s main and
>> sub receivers' 400Hz and 200Hz CW filter offsets are all quite a bit off
>> (even though I put the offsets in that were written on the filters), causing
>> me to tune the stations in at a lower than optimal tone (in order to hear
>> them properly) and trying to put in an XIT offset so they can hear me in
>> their tight RX passband. So far, it's not working that well. At a rough
>> guess, I'd say they were about 200 to 300Hz low of where I need them to be
>> (600Hz tone is my chosen optimal listening frequency).
>>
>>
>>
>> So, my question is, is there a simple way to accurately determine what the
>> frequency offset of each filter is without having to open the rig up and
>> dive in with test equipment?
>>
>>
>>
>> I'm guessing it could be something like:
>>
>> a.    Tune in a strong-ish CW station or carrier to exactly 600Hz audio
>> (use the tone mon to compare with the 600Hz reference audibly)
>> b.    Note the VFO frequency (on FINE)
>> c.    Use the RIT function to tune the station/carrier in to the peak of
>> the crystal filter
>> d.    Note the offset
>> e.    Apply the offset to the crystal filter bank
>>
>>
>>
>> What do you think of this procedure?
>>
>> Got a better/quicker one?
>>
>> Any/all input most gratefully accepted.
>>
>>
>>
>> Cheers es 73,
>>
>> Dave AD6A
>>
>>
>>
>> ---
>> This email has been checked for viruses by Avast antivirus software.
>> https://www.avast.com/antivirus
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to nr4c at widomaker.com
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to eric.swartz at elecraft.com