K3: proposed SSB coarse tuning rate change

[wayne burdick]

We've had many requests to provide an 0.5-kHz VFO tuning step size in  
SSB modes. I'd like to substitute this for the current 2.5 kHz  
selection. The new set of steps sizes for SSB would then be:

   0.1, 0.5, 1.0, 5.0

Most operators probably don't find 2.5 kHz steps to be particularly  
useful. 0.5 kHz, on the other hand, seems to be a useful lowest-common-
denominator for tuning the SSB band segments.

Each mode can have up to 4 step sizes with the K3's present per-mode  
data structure. I could add more step sizes, but that would require a  
much more extensive change.

Please let me know if you have a compelling requirement for 2.5 kHz  
steps.

73,
Wayne
N6KR

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[AD6XY]

This is the one aspect of the K3 I find frustrating. To QSY a few hundered kHz takes a lot of turning. I really like the way some radios speed up the tuning rate as you turn the dial faster. I use the RIT tuning very often to QSY quickly and for larger steps I end up having to use DFE which is tedious and often results in mistakes. I think this is almost the only thing Icom do better.

To answer your question Wayne - I personally don't find the higher corse tuning steps useful so I won't miss 2.5kHz steps.

wayne burdick wrote

We've had many requests to provide an 0.5-kHz VFO tuning step size in  
SSB modes. I'd like to substitute this for the current 2.5 kHz  
selection. The new set of steps sizes for SSB would then be:

   0.1, 0.5, 1.0, 5.0

Most operators probably don't find 2.5 kHz steps to be particularly  
useful. 0.5 kHz, on the other hand, seems to be a useful lowest-common-
denominator for tuning the SSB band segments.

Each mode can have up to 4 step sizes with the K3's present per-mode  
data structure. I could add more step sizes, but that would require a  
much more extensive change.

Please let me know if you have a compelling requirement for 2.5 kHz  
steps.

73,
Wayne
N6KR

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[Dave, G4AON]

Mike are you using the RIT/XIT control as a means of rapid tuning? On
80m SSB I can cross the band in less than two full turns of that knob,
and on CW it does 300 KHz in 6 turns or so, how quickly do you need to tune?

73 Dave, G4AON
K3/100 #80
-------------------
This is the one aspect of the K3 I find frustrating. To QSY a few hundered
kHz takes a lot of turning.
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[Julian, G4ILO]

Dave G4AON wrote

Mike are you using the RIT/XIT control as a means of rapid tuning? On
80m SSB I can cross the band in less than two full turns of that knob,
and on CW it does 300 KHz in 6 turns or so, how quickly do you need to tune?

I won't miss 2.5kHz, though I don't envisage using 0.5kHz either. I find 1kHz steps to be the most useful, thanks to the fact that so many people nowadays use transceivers with a high degree of frequency accuracy and tend to pick a frequency with all zeros in the last 3 digits. I don't think that means we've all turned into CB good buddies either. ;)

[AC7AC]

CONTENTS DELETED

The author has deleted this message.

[Julian, G4ILO]

While we're on the subject of step sizes I suppose it is worth thinking about the requirements of those who will be using the K3 on FM. Currently it appears there are only two choices, 5kHz and 10kHz. On 2m over here 12.5kHz and 25kHz might also be handy. What do others think? I personally won't find it a big deal if those step sizes aren't provided because my preference is to use the memories to tune FM channels on 2m, especially as they are now instantly usable. But just for example the FT-817 provides all these options for FM step size: 5, 6.25, 10, 12.5, 15, 20, 25 and 50kHz.

[ab2tc]

I may be daft but I still find the setting of the tuning step on the K3 very complex and bewildering. Why can't I choose between the 4 coarse settings by simply holding the COARSE button 4 times and the fine settings by tapping it 4 times? To have to go into CONFIG to do this seems unnecessarily complicated. Is it really that important to somebody to have a one click choice between two values?

AB2TC - Knut

Julian, G4ILO wrote

While we're on the subject of step sizes I suppose it is worth thinking about the requirements of those who will be using the K3 on FM. Currently it appears there are only two choices, 5kHz and 10kHz. On 2m over here 12.5kHz and 25kHz might also be handy. What do others think? I personally won't find it a big deal if those step sizes aren't provided because my preference is to use the memories to tune FM channels on 2m, especially as they are now instantly usable. But just for example the FT-817 provides all these options for FM step size: 5, 6.25, 10, 12.5, 15, 20, 25 and 50kHz.

[wayne burdick]

I can add up to two more FM coarse tuning rates easily.

Wayne
N6KR


On Sep 29, 2009, at 2:48 PM, Julian, G4ILO wrote:

>
> While we're on the subject of step sizes I suppose it is worth  
> thinking about
> the requirements of those who will be using the K3 on FM. Currently it
> appears there are only two choices, 5kHz and 10kHz. On 2m over here  
> 12.5kHz
> and 25kHz might also be handy. What do others think? I personally  
> won't find
> it a big deal if those step sizes aren't provided because my  
> preference is
> to use the memories to tune FM channels on 2m, especially as they  
> are now
> instantly usable....

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[oe9fwv]

Hi Wayne,

Wayne Burdick schrieb am 29 Sep 2009 um 10:29:

> We've had many requests to provide an 0.5-kHz VFO tuning step size in  SSB
> modes. I'd like to substitute this for the current 2.5 kHz  selection. The
> new set of steps sizes for SSB would then be:
>
>    0.1, 0.5, 1.0, 5.0
>
> Most operators probably don't find 2.5 kHz steps to be particularly  
> useful. 0.5 kHz, on the other hand, seems to be a useful lowest-common-
> denominator for tuning the SSB band segments.
>
> Each mode can have up to 4 step sizes with the K3's present per-mode  data
> structure. I could add more step sizes, but that would require a  much more
> extensive change.
>
> Please let me know if you have a compelling requirement for 2.5 kHz  
> steps.

I dont really care if the last step is 2.5 or 5 kHz. I think 5 is better for a fast move (QSY).  My
wish is that I can choose 0.5 kHz for the fast tuning rate with the clarifier knob. Most stations
are sitting either at .0 or .5, and it is nice to check the band with the RIT knob and fine tune with
the main VFO (which is rarely necessary in fact) This is what I use very often. YMMV.

cheers,
Werner oe9fwv


--
The only substitute for good manners is fast reflexes.


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[Geoffrey Downs-2]

12.5kHz sounds like a good idea in relation to the channelised part of 2m -
certainly for the UK and, I presume, the rest of EU too.

73

Geoff
G3UCK

----- Original Message -----
From: "Wayne Burdick" <[hidden email]>
To: "Julian, G4ILO" <[hidden email]>
Cc: <[hidden email]>
Sent: Wednesday, September 30, 2009 1:21 AM
Subject: Re: [Elecraft] K3: FM coarse tuning rates

>I can add up to two more FM coarse tuning rates easily.
>
> Wayne
> N6KR
>
>
> On Sep 29, 2009, at 2:48 PM, Julian, G4ILO wrote:
>
>>
>> While we're on the subject of step sizes I suppose it is worth
>> thinking about
>> the requirements of those who will be using the K3 on FM. Currently it
>> appears there are only two choices, 5kHz and 10kHz. On 2m over here
>> 12.5kHz
>> and 25kHz might also be handy. What do others think? I personally
>> won't find
>> it a big deal if those step sizes aren't provided because my
>> preference is
>> to use the memories to tune FM channels on 2m, especially as they
>> are now
>> instantly usable....
> ______________________________________________________________
> Elecraft mailing list
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>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>

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[wayne burdick]

Added to my list.

73,
Wayne
N6KR

On Sep 30, 2009, at 10:54 AM, Geoffrey Downs wrote:

> 12.5kHz sounds like a good idea in relation to the channelised part  
> of 2m - certainly for the UK and, I presume, the rest of EU too.
>
> 73
>
> Geoff
> G3UCK

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[AD6XY]

That would be great thanks. We are still using imperial fractional rather than decimal channel spacing over here in Europe.

Incidentally, you mentioned earlier "I could easily...." so I take it you are not writing all this code in assember. What arwe you using? C?

Mike

wayne burdick wrote

Added to my list.

73,
Wayne
N6KR

[wayne burdick]

95% of the MCU code is in C. I only use assembler where necessary to  
speed up algorithms.

The DSP code, on the other hand, is all written in assembler. If you  
have other questions about this, please send them to Lyle, KK7P (lyle  
at elecraft dot com).

73,
Wayne
N6KR


On Oct 1, 2009, at 11:18 AM, AD6XY wrote:

>
> That would be great thanks. We are still using imperial fractional  
> rather
> than decimal channel spacing over here in Europe.
>
> Incidentally, you mentioned earlier "I could easily...." so I take  
> it you
> are not writing all this code in assember. What arwe you using? C?



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