[hpsdr] Munin works finally

[Tony Hagen]

Hi Georg,

I am getting my coupler ready before I connect the output to the Spectrum 
Analyzer to get IMD results


73s
Tony



------------------------------

Date: Tue, 17 Dec 2013 17:05:26 +0530
From: "Tony Hagen" <prosdr at gmail.com>
To: <hpsdr at lists.openhpsdr.org>
Subject: [hpsdr] Munin works finally
Message-ID: <E563E3626EDD446B8CE90D506F65F497 at cedalabz>
Content-Type: text/plain; charset="utf-8"

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
----------------------------------------- 
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





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