[hpsdr] Analog Vs. Switching power supply for OZY Janus...

[k5nwa]

At 10:16 AM 6/11/2007, Al wrote:
>***** High Performance Software Defined Radio Discussion List *****
>
>
>Henry,
>SNIP
>The SDR1000 runs on an analog supply.
>
>AL, K0VM

No quite, it has an internal switcher to generate +-15V for the 
instrumentation amplifiers, it's also a source of noise for a few 
people, my SDR-1000 had really bad noise because of a tiny internal 
switcher, it was basically useless below 40M. I ended having to add 
additional filtering coming in and out of their switcher to get rid 
of the noise, but it voids the warranty.

I intend to repackage the SDR-1000 along with Ozy/Janus and it will 
use a linear power supply to eliminate any switchers from inside the radio.


Cecil
KD5NWA
www.softrockradio.org  www.qrpradio.com  www.hpsdr.com

"Blessed are the cracked, for they shall let in the light." 


 1181578187.0