[hpsdr] PING Preselector

[Lyle Johnson]

> There are latching versions available of the relays I selected, although 
> the samples I bought for testing are not latching.  Relay power is 180mW
> for an active relay, and there should not be more than three active at
> any time, so power should not be a big problem.

My vote is for latching relays :-)

540 mW can run a lot of circuitry!

73,

Lyle KK7P


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