[hpsdr] Penelope typical output power

[Lyle Johnson]

Hello Bruce!

> It would appear that the single-stage output amplifier runs into gain
> bandwidth product limits at the higher frequencies. The output stage for
> Hermes has been redesigned to distribute that gain between two stages of
> OPA2674. Perhaps if that approach pans out, an optional "daughterboard" or
> something similar could be done for Penelope to help equalize the available
> output across it's frequency range.

I've created a design I call PennyLane. It has the cascaded OPA2674 
amplifier from Hermes, along with the variable output power control 
circuitry being tested on Hermes.  It isn't a daughterboard, but one 
could certainly be designed.

The schematics and PCB files for PennLyane are done and ready to go. 
Once I know that these features are working as intended in Hermes, I'll 
release them under the OHL.

73,

Lyle KK7P


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