[hpsdr] re-production and the pennylane

Lyle Johnson kk7p at wavecable.com
Thu Mar 31 17:45:29 PDT 2011


> Speaking of the pennylane, there isn't much on the site or the wiki about it. I
> was wondering what actual improvements there were.

Two improvements:

1) better power output on 6 meters due to cascaded amplifier stages 
rather than a single stage;

2) better output s/n due to varying the reference voltage on the DAC 
rather than just having fewer bits of the DAC being used as power output 
is decreased.
---

Both of these improvements were tested out in an early generation Hermes 
prototype.
73,

Lyle KK7P

 1301618729.0


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