[hpsdr] PING Preselector

[Chris Albertson]

> 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.
 
180mW at the relay coil.  How efficient is the driver?  The power
supply?  My guess is 180mW at a relay coil equals about 400mW at the
AC wall outlet if you have a linear supply, less with a switcher. 
Times
three coils is 1.2 Watts.  It adds up.

Chris Albertson
  Home:   310-376-1029  chrisalbertson90278 at yahoo.com
  Office: 310-336-5189  Christopher.J.Albertson at aero.org

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