[hpsdr] QSO on 3 at 400 mW - Reducing output of Penny?

[Joe Martin K5SO]

...or, alternatively, you can remove JP2 on Penelope so that the input  
to the power output stage is removed and take your rf power out from  
JP2 itself (as Phil H. explained how to do earlier on this reflector)  
while running the PA Settings in PowerSDR near the high output power  
end of their ranges so that the original good dynamic range is  
maintained.  I do that presently to obtain approximately 1mW output  
from Penelope to drive my external amplifier chain to 1.5KW out.  It  
works great!

73,  Joe K5SO

On Mar 1, 2009, at 12:25 PM, Lyle Johnson wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
>> Yes - you can adjust the gain by band values in the PA Settings tab  
>> so you're only getting 10mW out when the main power out is set to  
>> 100%.
>
> Note that when you run the DAC at less than full scale, you begin to  
> reduce dynamic range.  Put another way, the Tx noise floor raises  
> and the relative level of Tx spurs increases by the amount you  
> reduce the signal from full scale.
>
> If you want to lower it a lot, you may want to consider using an  
> attenuator.
>
> 73,
>
> Lyle KK7P
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