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

2017-02-20 Thread 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  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



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

2017-02-18 Thread Nr4c 
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  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
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> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to n...@widomaker.com

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

2017-02-18 Thread Dave AD6A 
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



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