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K3 filter display size

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Mike Reublin

K3 filter display size

The truncated pyramid icon that displays a filter's width only has 2
sizes, a wide one (11 'segments') for my 2.8 and a narrower (7
'segments') for both the 400 and 250 filters. Is that the way it's
supposed to be? The wording on the xfil display is getting too small for
these eyes.

73, Mike NF4L

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Don Wilhelm-4

Re: K3 filter display size

Mike,

That truncated pyramid should change as you move the HI/LO CUT or
SHIFT/WIDTH knobs. In other words, it should respond to changes in the
DSP filter controls. Set the K3 to SSB and if the HI/LO indicators are
not illuminated, push one of the two buttons in - then turn the HI CUT
knob counterclockwise. The segments to the right should drop off as you
rotate the knob.

Then switch to the SHIFT/WIDTH display - rotate the shift knob and the
display should move left to right (no change in width), and rotate the
WIDTH knob to change the width - when you go counterclockwise, it should
go down to 50 Hz and the number of bars will be only two.

Yes, there is a lot of granularity to that display, but it still give a
good idea of the filter placement within the audio spectrum

73,
Don W3FPR

Mike wrote:
> The truncated pyramid icon that displays a filter's width only has 2
> sizes, a wide one (11 'segments') for my 2.8 and a narrower (7
> 'segments') for both the 400 and 250 filters. Is that the way it's
> supposed to be? The wording on the xfil display is getting too small for
> these eyes.
>
>
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Joe Subich, W4TV-4

Re: K3 filter display size

Don,

> Yes, there is a lot of granularity to that display, but it still
> give a good idea of the filter placement within the audio spectrum

The problem is that there is no change between 500/400 Hz or between
250/200 Hz. That means it is not possible to determine if a 400 Hz
or 200 Hz filter are selected only from the filter width display.
In the case where the "FLn" icons are too small to be read with one's
distance lenses and the radio is too far away for the reading lenses
the filter width display should be an important clue to the selected
filter.

73,

... Joe, W4TV

On 6/4/2010 10:00 AM, Don Wilhelm wrote:

> Mike,
>
> That truncated pyramid should change as you move the HI/LO CUT or
> SHIFT/WIDTH knobs. In other words, it should respond to changes in the
> DSP filter controls. Set the K3 to SSB and if the HI/LO indicators are
> not illuminated, push one of the two buttons in - then turn the HI CUT
> knob counterclockwise. The segments to the right should drop off as you
> rotate the knob.
>
> Then switch to the SHIFT/WIDTH display - rotate the shift knob and the
> display should move left to right (no change in width), and rotate the
> WIDTH knob to change the width - when you go counterclockwise, it should
> go down to 50 Hz and the number of bars will be only two.
>
> Yes, there is a lot of granularity to that display, but it still give a
> good idea of the filter placement within the audio spectrum
>
> 73,
> Don W3FPR
>
> Mike wrote:
>> The truncated pyramid icon that displays a filter's width only has 2
>> sizes, a wide one (11 'segments') for my 2.8 and a narrower (7
>> 'segments') for both the 400 and 250 filters. Is that the way it's
>> supposed to be? The wording on the xfil display is getting too small for
>> these eyes.
>>
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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KK7P

Re: K3 filter display size

The filter grphic is intended to provide relative informtion only, not
definitive information.

Roofing filters of 200, 250, 400, 500, 1000, 1500, 1800, 2100, 2700,
2800, 6000 and 13000 Hz are available for the K3. If/when the variable
roofing filters are available, the number of potential choices will be
even greater. This far exceeds the ability of the graphic to convey,
especially when shift is taken into account.

In the end, I think, one uses one's ears (or communications program) and
adjusts the controls for best copy. The radio will sort out which
available roofing to use based on how you adjust things.

73,

Lyle KK7P

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Mike Reublin

Re: K3 filter display size

In reply to this post by Don Wilhelm-4

Thanks, Don.
Yes the graphic can get quite narrow and move around when using the
controls as you state, but that wasn't my question. ;-)

73, Mike

Don Wilhelm wrote:

> Mike,
>
> That truncated pyramid should change as you move the HI/LO CUT or
> SHIFT/WIDTH knobs. In other words, it should respond to changes in
> the DSP filter controls. Set the K3 to SSB and if the HI/LO
> indicators are not illuminated, push one of the two buttons in - then
> turn the HI CUT knob counterclockwise. The segments to the right
> should drop off as you rotate the knob.
>
> Then switch to the SHIFT/WIDTH display - rotate the shift knob and the
> display should move left to right (no change in width), and rotate the
> WIDTH knob to change the width - when you go counterclockwise, it
> should go down to 50 Hz and the number of bars will be only two.
>
> Yes, there is a lot of granularity to that display, but it still give
> a good idea of the filter placement within the audio spectrum
>
> 73,
> Don W3FPR
>
> Mike wrote:
>> The truncated pyramid icon that displays a filter's width only has 2
>> sizes, a wide one (11 'segments') for my 2.8 and a narrower (7
>> 'segments') for both the 400 and 250 filters. Is that the way it's
>> supposed to be? The wording on the xfil display is getting too small
>> for these eyes.
>>
>>
>

Mike Reublin

Re: K3 filter display size

In reply to this post by Joe Subich, W4TV-4

Bingo! You got it in one. I have glasses ground for my computer
distance, but it would be nice to use the larger graphic.

73, Mike

Joe Subich, W4TV wrote:

> Don,
>
> > Yes, there is a lot of granularity to that display, but it still
> > give a good idea of the filter placement within the audio spectrum
>
> The problem is that there is no change between 500/400 Hz or between
> 250/200 Hz. That means it is not possible to determine if a 400 Hz
> or 200 Hz filter are selected only from the filter width display.
> In the case where the "FLn" icons are too small to be read with one's
> distance lenses and the radio is too far away for the reading lenses
> the filter width display should be an important clue to the selected
> filter.
>
> 73,
>
> ... Joe, W4TV
>
> On 6/4/2010 10:00 AM, Don Wilhelm wrote:
>
>> Mike,
>>
>> That truncated pyramid should change as you move the HI/LO CUT or
>> SHIFT/WIDTH knobs. In other words, it should respond to changes in the
>> DSP filter controls. Set the K3 to SSB and if the HI/LO indicators are
>> not illuminated, push one of the two buttons in - then turn the HI CUT
>> knob counterclockwise. The segments to the right should drop off as you
>> rotate the knob.
>>
>> Then switch to the SHIFT/WIDTH display - rotate the shift knob and the
>> display should move left to right (no change in width), and rotate the
>> WIDTH knob to change the width - when you go counterclockwise, it should
>> go down to 50 Hz and the number of bars will be only two.
>>
>> Yes, there is a lot of granularity to that display, but it still give a
>> good idea of the filter placement within the audio spectrum
>>
>> 73,
>> Don W3FPR
>>
>> Mike wrote:
>>
>>> The truncated pyramid icon that displays a filter's width only has 2
>>> sizes, a wide one (11 'segments') for my 2.8 and a narrower (7
>>> 'segments') for both the 400 and 250 filters. Is that the way it's
>>> supposed to be? The wording on the xfil display is getting too small for
>>> these eyes.
>>>
>>>

Mike Reublin

Re: K3 filter display size

In reply to this post by KK7P

Thanks Lyle.
In that case maybe it shouldn't change at all in response to filter
selection. OTOH, 250 is relatively narrower than 400, and the graphic IS
able to be shown relatively small..

First I've heard of variable roofing filters. What will the XFIL display
show if/when that's implemented?

Ears are going too, but I agree one adjusts what controls one has to get
the best copy, I'd just like to know what that is. Necessary? No. Useful
to me? Yes.
I'll look into the programmers manual and see if I can incorporate
something into my logging program.

73, Mike

Lyle Johnson wrote:

> The filter grphic is intended to provide relative informtion only, not
> definitive information.
>
> Roofing filters of 200, 250, 400, 500, 1000, 1500, 1800, 2100, 2700,
> 2800, 6000 and 13000 Hz are available for the K3. If/when the variable
> roofing filters are available, the number of potential choices will be
> even greater. This far exceeds the ability of the graphic to convey,
> especially when shift is taken into account.
>
> In the end, I think, one uses one's ears (or communications program) and
> adjusts the controls for best copy. The radio will sort out which
> available roofing to use based on how you adjust things.
>
> 73,
>
> Lyle KK7P
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>

Mike Reublin

Re: K3 filter display size

In reply to this post by Mike Reublin

Hmmmm.... I dunno what happened here. My reply to Joe shows up under
Lyle's post, and my response to Lyle doesn't show at all. I checked the
address lines on the posts in my 'Sent' box and all three have the
individual's name and Elecraft.

Did you get it Lyle?

73, Mike NF4L

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Guy, K2AV

Re: K3 filter display size

I think the problem may be the perception that the size of the width
indicators on the display is infinitely variable. Those appear to be
individual designed segments, as are the letter segments. It is not
an LCD screen with all images made from a graphics processor
generating pixel-based images, which could be varied to anything in
software.

One can see all the segments and everything that can be shown on the
display by tapping MENU, turning VFO B to LCD ADJ, and turning VFO A
counter-clockwise until all the segments light up. Displaying
anything else would seem to involve replacing the display and the code
that drives it.

Elecraft would have to comment as to the facts of that choice, though
I would speculate that there is cost, coding complexity, space,
possibly internal noise considerations, and that keeping dedicated
segments updated occupies far less processor time and code than
graphics generation for an LCD, and they have chosen to concentrate
that power on signal processing.

73, Guy.

On Fri, Jun 4, 2010 at 2:05 PM, Mike <[hidden email]> wrote:

> Hmmmm.... I dunno what happened here. My reply to Joe shows up under
> Lyle's post, and my response to Lyle doesn't show at all. I checked the
> address lines on the posts in my 'Sent' box and all three have the
> individual's name and Elecraft.
>
> Did you get it Lyle?
>
> 73, Mike NF4L
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

Mike K2MK

Re: K3 filter display size

In reply to this post by Joe Subich, W4TV-4

Hi Joe:

Here's a low tech solution: "trifocals". I sit about 28" from my computer screen and about the same from the K3. The middle range of my trifocals is perfect. Same problem and solution for the speedometer on the car's dashboard.

73,
Mike K2MK

<quote author="Joe Subich, W4TV-4">

Don,

> Yes, there is a lot of granularity to that display, but it still
> give a good idea of the filter placement within the audio spectrum

The problem is that there is no change between 500/400 Hz or between
250/200 Hz. That means it is not possible to determine if a 400 Hz
or 200 Hz filter are selected only from the filter width display.
In the case where the "FLn" icons are too small to be read with one's
distance lenses and the radio is too far away for the reading lenses
the filter width display should be an important clue to the selected
filter.

73,

... Joe, W4TV

On 6/4/2010 10:00 AM, Don Wilhelm wrote:
> Mike,
>
> That truncated pyramid should change as you move the HI/LO CUT or
> SHIFT/WIDTH knobs. In other words, it should respond to changes in the
> DSP filter controls. Set the K3 to SSB and if the HI/LO indicators are
> not illuminated, push one of the two buttons in - then turn the HI CUT
> knob counterclockwise. The segments to the right should drop off as you
> rotate the knob.
>
> Then switch to the SHIFT/WIDTH display - rotate the shift knob and the
> display should move left to right (no change in width), and rotate the
> WIDTH knob to change the width - when you go counterclockwise, it should
> go down to 50 Hz and the number of bars will be only two.
>
> Yes, there is a lot of granularity to that display, but it still give a
> good idea of the filter placement within the audio spectrum
>
> 73,
> Don W3FPR
>
> Mike wrote:
>> The truncated pyramid icon that displays a filter's width only has 2
>> sizes, a wide one (11 'segments') for my 2.8 and a narrower (7
>> 'segments') for both the 400 and 250 filters. Is that the way it's
>> supposed to be? The wording on the xfil display is getting too small for
>> these eyes.
>>

Doug Turnbull

K3 Display and Eye Glasses for OTs only

Mike,
Another solution is to have a pair of glasses for radio use. I have
set of bifocals which are used for computer and radio with roughly a thirty
inch focal length and reading at roughly fourteen inches. I find them very
convenient in the radio shack.
73 Doug EI2CN
PS What have we come to talking this way.

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Mike K2MK
Sent: 04 June 2010 19:50
To: [hidden email]
Subject: Re: [Elecraft] K3 filter display size

Hi Joe:

Here's a low tech solution: "trifocals". I sit about 28" from my computer
screen and about the same from the K3. The middle range of my trifocals is
perfect. Same problem and solution for the speedometer on the car's
dashboard.

73,
Mike K2MK

Don,

> Yes, there is a lot of granularity to that display, but it still
> give a good idea of the filter placement within the audio spectrum

The problem is that there is no change between 500/400 Hz or between
250/200 Hz. That means it is not possible to determine if a 400 Hz
or 200 Hz filter are selected only from the filter width display.
In the case where the "FLn" icons are too small to be read with one's
distance lenses and the radio is too far away for the reading lenses
the filter width display should be an important clue to the selected
filter.

73,

... Joe, W4TV

On 6/4/2010 10:00 AM, Don Wilhelm wrote:

--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-filter-display-size-tp5139220p514068
9.html
Sent from the [K3] mailing list archive at Nabble.com.
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Brendan Minish

Re: K3 Display and Eye Glasses for OTs only

I am short sighted and my near vision is still quite good however I use
a set of thin 'dollar store' +2 reading glasses when I do SMT work on my
bench, these go over my normal glasses and give me some binocular
magnification for doing fine (re)work. Choose the magnification factor
in the shop such that you can still focus at your normal working
distance and get thin ones so that you can look over the top of them for
looking at stuff further away (like the scope, PC etc)

Much cheaper than an optivisor and a big help at the bench

73
Brendan EI6IZ

On Fri, 2010-06-04 at 20:11 +0100, Doug Turnbull wrote:

> Mike,
> Another solution is to have a pair of glasses for radio use. I have
> set of bifocals which are used for computer and radio with roughly a thirty
> inch focal length and reading at roughly fourteen inches. I find them very
> convenient in the radio shack.
> 73 Doug EI2CN
> PS What have we come to talking this way.
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Mike K2MK
> Sent: 04 June 2010 19:50
> To: [hidden email]
> Subject: Re: [Elecraft] K3 filter display size
>
>
> Hi Joe:
>
> Here's a low tech solution: "trifocals". I sit about 28" from my computer
> screen and about the same from the K3. The middle range of my trifocals is
> perfect. Same problem and solution for the speedometer on the car's
> dashboard.
>
> 73,
> Mike K2MK
>
>
>
>
>
> Don,
>
> > Yes, there is a lot of granularity to that display, but it still
> > give a good idea of the filter placement within the audio spectrum
>
> The problem is that there is no change between 500/400 Hz or between
> 250/200 Hz. That means it is not possible to determine if a 400 Hz
> or 200 Hz filter are selected only from the filter width display.
> In the case where the "FLn" icons are too small to be read with one's
> distance lenses and the radio is too far away for the reading lenses
> the filter width display should be an important clue to the selected
> filter.
>
> 73,
>
> ... Joe, W4TV
>
> On 6/4/2010 10:00 AM, Don Wilhelm wrote:
> > Mike,
> >
> > That truncated pyramid should change as you move the HI/LO CUT or
> > SHIFT/WIDTH knobs. In other words, it should respond to changes in the
> > DSP filter controls. Set the K3 to SSB and if the HI/LO indicators are
> > not illuminated, push one of the two buttons in - then turn the HI CUT
> > knob counterclockwise. The segments to the right should drop off as you
> > rotate the knob.
> >
> > Then switch to the SHIFT/WIDTH display - rotate the shift knob and the
> > display should move left to right (no change in width), and rotate the
> > WIDTH knob to change the width - when you go counterclockwise, it should
> > go down to 50 Hz and the number of bars will be only two.
> >
> > Yes, there is a lot of granularity to that display, but it still give a
> > good idea of the filter placement within the audio spectrum
> >
> > 73,
> > Don W3FPR
> >
> > Mike wrote:
> >> The truncated pyramid icon that displays a filter's width only has 2
> >> sizes, a wide one (11 'segments') for my 2.8 and a narrower (7
> >> 'segments') for both the 400 and 250 filters. Is that the way it's
> >> supposed to be? The wording on the xfil display is getting too small for
> >> these eyes.
> >>

--
73
Brendan EI6IZ

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Joe Subich, W4TV-4

Re: K3 filter display size

In reply to this post by Mike K2MK

Mike,

My (executive) bifocals are normally fine for computer work
and the radio - as well as bench work - at 24 to 36" inches
as well as reading at 12 to 18" and reading the dash of the
car. However, the size of the FLx and similar icons is a
bit too small to read at the outer edge of the range.

I purposely had the "line" set at the normal trifocal height
to provide maximum field of view specifically for use with
the computer/radio/bench.

Note the speedometer of most automobiles is just a bit larger
than "FLx" in the K3.

73,

... Joe, W4TV

On 6/4/2010 2:49 PM, Mike K2MK wrote:

>
> Hi Joe:
>
> Here's a low tech solution: "trifocals". I sit about 28" from my computer
> screen and about the same from the K3. The middle range of my trifocals is
> perfect. Same problem and solution for the speedometer on the car's
> dashboard.
>
> 73,
> Mike K2MK
>
>
>
>
>
> Don,
>
> > Yes, there is a lot of granularity to that display, but it still
> > give a good idea of the filter placement within the audio spectrum
>
> The problem is that there is no change between 500/400 Hz or between
> 250/200 Hz. That means it is not possible to determine if a 400 Hz
> or 200 Hz filter are selected only from the filter width display.
> In the case where the "FLn" icons are too small to be read with one's
> distance lenses and the radio is too far away for the reading lenses
> the filter width display should be an important clue to the selected
> filter.
>
> 73,
>
> ... Joe, W4TV
>
> On 6/4/2010 10:00 AM, Don Wilhelm wrote:
>> Mike,
>>
>> That truncated pyramid should change as you move the HI/LO CUT or
>> SHIFT/WIDTH knobs. In other words, it should respond to changes in the
>> DSP filter controls. Set the K3 to SSB and if the HI/LO indicators are
>> not illuminated, push one of the two buttons in - then turn the HI CUT
>> knob counterclockwise. The segments to the right should drop off as you
>> rotate the knob.
>>
>> Then switch to the SHIFT/WIDTH display - rotate the shift knob and the
>> display should move left to right (no change in width), and rotate the
>> WIDTH knob to change the width - when you go counterclockwise, it should
>> go down to 50 Hz and the number of bars will be only two.
>>
>> Yes, there is a lot of granularity to that display, but it still give a
>> good idea of the filter placement within the audio spectrum
>>
>> 73,
>> Don W3FPR
>>
>> Mike wrote:
>>> The truncated pyramid icon that displays a filter's width only has 2
>>> sizes, a wide one (11 'segments') for my 2.8 and a narrower (7
>>> 'segments') for both the 400 and 250 filters. Is that the way it's
>>> supposed to be? The wording on the xfil display is getting too small for
>>> these eyes.
>>>

Mike Reublin

Re: K3 Display and Eye Glasses for OTs only

In reply to this post by Doug Turnbull

Thanks, Doug.

You missed the post where I said I have the extra glasses. Without them,
I probably would have to put one of those 'page magnifiers' on the front
panel..... :-)

73, Mike NF4L

Doug Turnbull wrote:

> Mike,
> Another solution is to have a pair of glasses for radio use. I have
> set of bifocals which are used for computer and radio with roughly a thirty
> inch focal length and reading at roughly fourteen inches. I find them very
> convenient in the radio shack.
> 73 Doug EI2CN
> PS What have we come to talking this way.
>
> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Mike K2MK
> Sent: 04 June 2010 19:50
> To: [hidden email]
> Subject: Re: [Elecraft] K3 filter display size
>
>
> Hi Joe:
>
> Here's a low tech solution: "trifocals". I sit about 28" from my computer
> screen and about the same from the K3. The middle range of my trifocals is
> perfect. Same problem and solution for the speedometer on the car's
> dashboard.
>
> 73,
> Mike K2MK
>
>
>
>
>
> Don,
>
> > Yes, there is a lot of granularity to that display, but it still
> > give a good idea of the filter placement within the audio spectrum
>
> The problem is that there is no change between 500/400 Hz or between
> 250/200 Hz. That means it is not possible to determine if a 400 Hz
> or 200 Hz filter are selected only from the filter width display.
> In the case where the "FLn" icons are too small to be read with one's
> distance lenses and the radio is too far away for the reading lenses
> the filter width display should be an important clue to the selected
> filter.
>
> 73,
>
> ... Joe, W4TV
>
> On 6/4/2010 10:00 AM, Don Wilhelm wrote:
>
>> Mike,
>>
>> That truncated pyramid should change as you move the HI/LO CUT or
>> SHIFT/WIDTH knobs. In other words, it should respond to changes in the
>> DSP filter controls. Set the K3 to SSB and if the HI/LO indicators are
>> not illuminated, push one of the two buttons in - then turn the HI CUT
>> knob counterclockwise. The segments to the right should drop off as you
>> rotate the knob.
>>
>> Then switch to the SHIFT/WIDTH display - rotate the shift knob and the
>> display should move left to right (no change in width), and rotate the
>> WIDTH knob to change the width - when you go counterclockwise, it should
>> go down to 50 Hz and the number of bars will be only two.
>>
>> Yes, there is a lot of granularity to that display, but it still give a
>> good idea of the filter placement within the audio spectrum
>>
>> 73,
>> Don W3FPR
>>
>> Mike wrote:
>>
>>> The truncated pyramid icon that displays a filter's width only has 2
>>> sizes, a wide one (11 'segments') for my 2.8 and a narrower (7
>>> 'segments') for both the 400 and 250 filters. Is that the way it's
>>> supposed to be? The wording on the xfil display is getting too small for
>>> these eyes.
>>>
>>>

Mike Reublin

Re: K3 filter display size

In reply to this post by Guy, K2AV

Hi Guy.

No, the problem is my failing eyes. The graphic in question can be
varied in width from 11 'segments' down to 3, via the width control, in
3 discreet, and very visible steps. That's just not enough granularity
to accomplish what I was thinking about.

It's a design choice that our good friends in Aptos made for whatever
reasons they had, and I don't think it (like anything else on the K3)
was a trivial quirk. I actually only wanted to know if my K3 was
reacting as designed.

73, Mike NF4L

Guy Olinger K2AV wrote:

> I think the problem may be the perception that the size of the width
> indicators on the display is infinitely variable. Those appear to be
> individual designed segments, as are the letter segments. It is not
> an LCD screen with all images made from a graphics processor
> generating pixel-based images, which could be varied to anything in
> software.
>
> One can see all the segments and everything that can be shown on the
> display by tapping MENU, turning VFO B to LCD ADJ, and turning VFO A
> counter-clockwise until all the segments light up. Displaying
> anything else would seem to involve replacing the display and the code
> that drives it.
>
> Elecraft would have to comment as to the facts of that choice, though
> I would speculate that there is cost, coding complexity, space,
> possibly internal noise considerations, and that keeping dedicated
> segments updated occupies far less processor time and code than
> graphics generation for an LCD, and they have chosen to concentrate
> that power on signal processing.
>
> 73, Guy.
>
> On Fri, Jun 4, 2010 at 2:05 PM, Mike <[hidden email]> wrote:
>
>> Hmmmm.... I dunno what happened here. My reply to Joe shows up under
>> Lyle's post, and my response to Lyle doesn't show at all. I checked the
>> address lines on the posts in my 'Sent' box and all three have the
>> individual's name and Elecraft.
>>
>> Did you get it Lyle?
>>
>> 73, Mike NF4L
>>
>>
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>
>

N7US

Re: K3 Display and Eye Glasses for OTs only

In reply to this post by Doug Turnbull

I have a shelf so I can have my two 19" monitors above the K3, rotor
control, SteppIR box, and paddle. The monitors are too high for my
"progressive" lenses, which are continuously variable from reading to
distance with no line (think analog instead of digital!). The shelf is 8"
(20 cm) above the desk top.

I have a set of what the optician called "office glasses." They are also
progressives, but the top part is for 2-3' (60-90 cm) or so. Actually the
top 2 mm is the real distance prescription, but it isn't very useful.

It's a nuisance to use two pairs of glasses but it works well for me. I
really like progressive lenses for the same reason I like a speed knob on a
keyer.

Jim N7US

PS: It beats the other subject old guys talk about!

-----Original Message-----

Mike,
Another solution is to have a pair of glasses for radio use. I have
set of bifocals which are used for computer and radio with roughly a thirty
inch focal length and reading at roughly fourteen inches. I find them very
convenient in the radio shack.
73 Doug EI2CN
PS What have we come to talking this way.

-----Original Message-----

Hi Joe:

Here's a low tech solution: "trifocals". I sit about 28" from my computer
screen and about the same from the K3. The middle range of my trifocals is
perfect. Same problem and solution for the speedometer on the car's
dashboard.

73,
Mike K2MK

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