[hpsdr] Demeter: Some calculations

[Henry Vredegoor]

Hi Jeroen, All,
 
As I was thinking about the different PSU's in Demeter, I was guessing with
what kind of figures for power dissipation, currents, efficiency etc. one
would have to deal with for a particular proposed configuration.
 
I created a spreadsheet in Excel to "do the math" and (again...) it gave me
a good idea of what to expect for these.
 
I attached a copy of the spreadsheet I made.
 
Would like for other people to check it and verify the results.
 
Maybe this could also help with deciding what route to take with Demeter.
 
73's,
 
Henry.
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