Click on "Photos" link in the blue box on the left side of the
screen in the softrock-40 group. You will be taken to the photos
section. Click on the N1RX folder.
-Bruce.
--- In softrock40@..., Bill Dumke <billd@n...> wrote:
What N1RX folder?
Bill WB5TCO
Bruce Beford wrote:
Apparently, my last message on this got lost in the server
somehwere.
I have uploaded two new photos to the N1RX folder that show the
difference between powering the SoftRock from the USB port vs
using
a battery powered supply.
Both photos show the central noise spike from an SR-40 connected
to
a dipole antenna. The only difference between the two photos are
the
source of power. In the first, the SR-40 is powered by the USB
port,
using the standard Q1 power conditioner. In the second, the SAME
SR-
40 is now powered by a 78L05 voltage regulator, driven by a
battery.
Notice the difference in the width of the central noise spike.
Better performance from the SR-40 can be obtained by running
from a
power source OTHER than the USB port on the computer. Battery
power
is best. For details on how to modify the SoftRock to use non-
computer power, see the other photos in the N1RX folder.
73,
Bruce N1RX
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