[Elecraft] K2 turn-on frequency/band memory explained

[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?


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