[Elecraft] K2: how can it work with the latched relays?

[Jack Brindle]

It's Elecraft magic!

Actually, it's not that difficult. We reset all the relays when a  
tune session begins, then adjust them as the magic algorithm  
proceeds. When the desired tune level is achieved, we save the relay  
state information in non-volatile memory for later use (next time we  
return to the band).

On Dec 10, 2006, at 9:05 AM, Karsten Eppert(DK4AS) wrote:

> No doubt: ist works, but I have a question in mind. As far as I  
> understand, the latching relays are switched back and forth by  
> short pulses from the I/O-controller. But: how does the controller  
> know the initial stage of the relay in order to switch to the  
> desired position? How does the controller know the position of the  
> relay after power failure with complete controller-reset?
>
> Please help a curious man!
>
> 73
> Karsten
> DK4AS

- Jack Brindle, W6FB
------------------------------------------------------------------------ 
---------------------