[Elecraft] K3: too easy to overwrite dial memories

[David Ferrington, M0XDF]

no way do it want to drop power to zero, just so i can load a memory
--  
The trees that are slow to grow bear the best fruit.
-Moliere, actor and playwright (1622-1673)

On 29 May 2008, at 17:49, David Cutter wrote:

> Would your rule be covered if you had to hold in another button at  
> the same time as hitting the memory button?  Or, say, turn the power  
> to zero before making memory additions...
>
> David
> G3UNA
>
>
>>  In the world of ergonomics and man-machine interface design, there  
>> is a rule:  If an action will destroy information  or a state than  
>> cannot be restored with the same effort that it took to destroy,  
>> then the system requires either (a) a "Un-Do" function of equal  
>> simplicity, or (b) a confirmation step.
>>
>>  The choice between (a) or (b) depends on the consequences of the  
>> unintended action during the time it takes to recover.  For  
>> example, a (hypothetical!) button that shuts down the jet engines  
>> on an aircraft requires a confirmation step... because turning off  
>> the engines until the pilot hits UnDo would be bad!
>>
>>  This rule applies to software as well as hardware.
>>
>> -- Eric K3NA 
>