K2 turn on frequency/band memory

[Bernie Gardner]

I'm still leanring all the features and quirks of my K2 (5705)  and have a
quick question.  Exactly how does the default frequency of each band get
set..  The manual mentions how 'each band memory is preset..' on first turn
on, but I can't find an explanation of how it is changed.  By trial and
error, it seems to be changed when I change frequency, then change mode, but
not just by changing frequency.  So if I'm in cw mode, tune to an interesting
frequency, turn the radio off then back on, it goes back to a previously
determined frequency, not the most recent one.  If I change frequency, cycle
through cw-usb-lsb-cw, turn the radio off and back on, it then comes up with
the most recent frequency.  The same behavior seems to apply to changing
bands.  Is this the way it is supposed to work and is it possible to have it
just remember the most recent frequency on each band without cycling through
the modes?

Thanks for any suggestions!

Bernie
W1AZ
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[Don Wilhelm-3]

Bernie,

There is the '30 second rule' that you have to contend with.  The K2 waits
30 seconds after you have tuned to a new frequency, set a new mode, etc.
before it sets those parameters into memory.  So if you tune to a spot and
then quickly turn power off, it will not remember your settings.  Wait a
while (30 seconds seems like forever if you are in a hurry), and it will
behave just like the manual says.

73,
Don W3FPR

> -----Original Message-----
>
> I'm still leanring all the features and quirks of my K2 (5705)
> and have a
> quick question.  Exactly how does the default frequency of each band get
> set..  The manual mentions how 'each band memory is preset..' on
> first turn
> on, but I can't find an explanation of how it is changed.  By trial and
> error, it seems to be changed when I change frequency, then
> change mode, but
> not just by changing frequency.  So if I'm in cw mode, tune to an
> interesting
> frequency, turn the radio off then back on, it goes back to a previously
> determined frequency, not the most recent one.  If I change
> frequency, cycle
> through cw-usb-lsb-cw, turn the radio off and back on, it then
> comes up with
> the most recent frequency.  The same behavior seems to apply to changing
> bands.  Is this the way it is supposed to work and is it possible
> to have it
> just remember the most recent frequency on each band without
> cycling through
> the modes?
>
>

--
No virus found in this outgoing message.
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5:39 PM

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[Ian Stirling, G4ICV, AB2GR]

On Monday 18 December 2006 00:35, Don Wilhelm wrote:

> There is the '30 second rule' that you have to contend with.

  In the non paranoid days, this time could be changed by
tweaking a pot, and it would be obvious from the published
circuit diagram.  Now it's locked into proprietary firmware.

Ian, G4ICV, AB2GR
--
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[Dan Barker]

The band-switch will "remember" the current settings Right Now. Any change
of band causes the current band's settings to be memorized. If you need to
"speed up" the 30-second memory for some reason, a bandup/banddown will do
so.

Dan / WG4S / K2 #2456

<snip>
There is the '30 second rule' that you have to contend with.  The K2 waits
30 seconds after you have tuned to a new frequency, set a new mode, etc.
before it sets those parameters into memory.  So if you tune to a spot and
then quickly turn power off, it will not remember your settings.  Wait a
while (30 seconds seems like forever if you are in a hurry), and it will
behave just like the manual says.

73,
Don W3FPR
</snip>

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[Vic K2VCO]

Ian Stirling wrote:

>   In the non paranoid days, this time could be changed by
> tweaking a pot, and it would be obvious from the published
> circuit diagram.  Now it's locked into proprietary firmware.

Well...I would put it differently.  In the pre-microprocessor days,
there would have been a pot and a bunch of other components which would
have added some significant amount to the cost of the radio.  Now the
function is handled by firmware whose only cost is that of the initial
development.

Multiply this by many similar functions, and you have a radio with a lot
more capabilities for less cost.  It's not paranoia, just effective use
of technology.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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[Bob Nielsen]

On Dec 18, 2006, at 7:48 AM, Vic K2VCO wrote:

> Ian Stirling wrote:
>
>>   In the non paranoid days, this time could be changed by
>> tweaking a pot, and it would be obvious from the published
>> circuit diagram.  Now it's locked into proprietary firmware.
>
> Well...I would put it differently.  In the pre-microprocessor days,  
> there would have been a pot and a bunch of other components which  
> would have added some significant amount to the cost of the radio.  
> Now the function is handled by firmware whose only cost is that of  
> the initial development.
>
> Multiply this by many similar functions, and you have a radio with  
> a lot more capabilities for less cost.  It's not paranoia, just  
> effective use of technology.

My pre-microprocessor radios always came back on at the same  
frequency as long as nobody had touched the bandswitch or the dial of  
the tuning capacitor (PTO in some cases).

73 - Bob, N7XY

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[Don Wilhelm-3]

Dan is correct - so hit the bandswitch up and then down before powering the
K2 off as an alternate solution to waiting that 30 seconds.  But if you are
like me, you will not remember at just that 'right moment' <G>, but at least
you will realize what you forgot to do.

73,
Don W3FPR

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]]On Behalf Of Dan Barker
> Sent: Monday, December 18, 2006 9:55 AM
> To: [hidden email]
> Subject: RE: [Elecraft] K2 turn on frequency/band memory
>
>
> The band-switch will "remember" the current settings Right Now. Any change
> of band causes the current band's settings to be memorized. If you need to
> "speed up" the 30-second memory for some reason, a bandup/banddown will do
> so.
>
> Dan / WG4S / K2 #2456
>
> <snip>
> There is the '30 second rule' that you have to contend with.  The K2 waits
> 30 seconds after you have tuned to a new frequency, set a new mode, etc.
> before it sets those parameters into memory.  So if you tune to a spot and
> then quickly turn power off, it will not remember your settings.  Wait a
> while (30 seconds seems like forever if you are in a hurry), and it will
> behave just like the manual says.
>
> 73,
> Don W3FPR
> </snip>
>
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> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.432 / Virus Database: 268.15.22/590 - Release Date:
> 12/16/2006 5:39 PM
>

--
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Checked by AVG Free Edition.
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1:45 PM

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[wayne burdick]

Hi Bernie,

I should have answered this sooner, but was out of town.

Here's how it works. The K2 doesn't have battery-backed-up RAM (which,
obviously, requires a battery, as well as other hardware/firmware
support). Instead, it has an EEPROM which stores all parameters. The
present band, mode, etc. is saved in EEPROM whenever you change bands.
But it is also saved after you've shown an "interest" in a particular
frequency -- by not moving the VFO for 30 seconds. This works almost as
well in practice as battery-backed-up RAM, but avoids the cost of a
battery, socket, and power-off/power-on switching and detection
circuitry.

73,
Wayne
N6KR


Bernie Gardner wrote:

> I'm still leanring all the features and quirks of my K2 (5705)  and
> have a
> quick question.  Exactly how does the default frequency of each band
> get
> set..  The manual mentions how 'each band memory is preset..' on first
> turn
> on, but I can't find an explanation of how it is changed.  By trial and
> error, it seems to be changed when I change frequency, then change
> mode, but
> not just by changing frequency.  So if I'm in cw mode, tune to an
> interesting
> frequency, turn the radio off then back on, it goes back to a
> previously
> determined frequency, not the most recent one.  If I change frequency,
> cycle
> through cw-usb-lsb-cw, turn the radio off and back on, it then comes
> up with
> the most recent frequency.  The same behavior seems to apply to
> changing
> bands.  Is this the way it is supposed to work and is it possible to
> have it
> just remember the most recent frequency on each band without cycling
> through
> the modes?

---

http://www.elecraft.com

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[Bernie Gardner]

Thanks for the information Wayne (and everyone else who replied.)

I understand how it works now and it makes sense.  I should have seen the
explanation in the manual, but I got more details on the list anyway.  I love
the radio and am enjoying learning all it's features.  

Bernie
W1AZ

On Monday 18 December 2006 20:49, wayne burdick wrote:

> Hi Bernie,
>
> I should have answered this sooner, but was out of town.
>
> Here's how it works. The K2 doesn't have battery-backed-up RAM (which,
> obviously, requires a battery, as well as other hardware/firmware
> support). Instead, it has an EEPROM which stores all parameters. The
> present band, mode, etc. is saved in EEPROM whenever you change bands.
> But it is also saved after you've shown an "interest" in a particular
> frequency -- by not moving the VFO for 30 seconds. This works almost as
> well in practice as battery-backed-up RAM, but avoids the cost of a
> battery, socket, and power-off/power-on switching and detection
> circuitry.
>
> 73,
> Wayne
> N6KR
>
> Bernie Gardner wrote:
> > I'm still leanring all the features and quirks of my K2 (5705)  and
> > have a
> > quick question.  Exactly how does the default frequency of each band
> > get
> > set..  The manual mentions how 'each band memory is preset..' on first
> > turn
> > on, but I can't find an explanation of how it is changed.  By trial and
> > error, it seems to be changed when I change frequency, then change
> > mode, but
> > not just by changing frequency.  So if I'm in cw mode, tune to an
> > interesting
> > frequency, turn the radio off then back on, it goes back to a
> > previously
> > determined frequency, not the most recent one.  If I change frequency,
> > cycle
> > through cw-usb-lsb-cw, turn the radio off and back on, it then comes
> > up with
> > the most recent frequency.  The same behavior seems to apply to
> > changing
> > bands.  Is this the way it is supposed to work and is it possible to
> > have it
> > just remember the most recent frequency on each band without cycling
> > through
> > the modes?
>
> ---
>
> http://www.elecraft.com

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