[hpsdr] Munin works finally

georg Prinz getpri at t-online.de
Tue Dec 17 04:15:42 PST 2013


Hi Tony,

did you measure your IMD3 results? Be aware, that Penelope has his worst 
IMD3 at low PA-Settings (38,8dB). I measured Penelope at max output with 
-38.6dB going up to -70,3dB at Pa-Settings of 55,0dB.

73, Georg, dl2kp



Am 17.12.2013 12:35, schrieb Tony Hagen:
> ***** High Performance Software Defined Radio Discussion List *****
>
>
>
> Hi Kjell,
> Good news -Munin works well now.
> C25,26,27 which I replaced with 4x220 pf/1kv --Disc-ceramic is heating 
> superb -- Is this is because its not mlcc
> As I was going through the datasheet of the MOSFET -- RD100HFF1 its 
> recommended for 0-30Mhz -- how we achieve results or cover the 6 meter 
> band.
> Further, what I experienced the bias voltage shifts with the 
> temperature rise that might result in instability of the power output 
> so something temperature compensated bias circuitry if incorporated 
> will enhance the efficiency of the circuit.
> Of course, my present worry is C25,C26,C27
> 73s
> Tony
>
>
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