[hpsdr] SMPS the wrong way to go

Phil Harman phil at pharman.org
Tue Aug 10 17:49:04 PDT 2010


Hi Frank,

Normally I would agree with you. However, having tested the very high
frequency SMPSU that Kjell designed on one of the prototype Hermes PCBs I
can confirm that this is the way forward.

This not your usual SMPSU Toto....

73's Phil...VK6APH






> ***** High Performance Software Defined Radio Discussion List *****
>
> An SMPS on the same board with a -140 dBM noise floor RX will degrade the
> board.
> Why make more noise, just remote the regulator or do a better heat sink.
> Any spurs are too much. Frank
>  
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