??? Thanks Mike. I have just finished double checking
everything, physically. No problems found so far. I am not able to detect the
oscillator at the crystal frequency. I think this, for whatever reason, may be
the culprit.
?
Still
checking,
Stan Rife
W5EWA
Houston, TX
K2 S/N
4216
?
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Computers can be
quirky! Try using the microphone input on your computer
instead of the line
input just be be sure thats not what its trying to get
input from. If you
have a scope, feed a signal into the sr40 in its tuning
range and look at
the audio output on the scope, you should see a nice sine
wave. Or if you
have no scope, if you have a signal source near the 7056
frequency, you can
just feed the audio out into an audio amplifier, the sr40
is basically a
wideband direct conversion receiver. If no output that way,
try listening
for the crystal oscillator on the sr40 with a receiver that
tunes 10
meters. If you hear that ok, check carefully the windings on the
toroid bot
for good soldering and proper positioning. Oh, and you might try
tracking
down that problem of no green light on the one usb connection. It
might be
significant. It probably would not be a good idea to try to run the
sr40 on
6 volts from a wall wart, unless its regulated it will probably be
much
more than 6 volts at the light load of the sr40, and even 6 volts
probably
is higher than the max voltage for the chips. Radio shack sells
7808 +5 V
regulators for $1.59, that could be used with a wall wart to get
the right
voltage. Of if you have a self-powered (one that comes with a wall
wart)
usb hub, that could supply power for test purposes.
If you have an
audio oscillator, you can try feeding that into the computer
and you should
see something on the powersdr display to check out the
computer side of
things.
Good luck and let us know what the problem was!
73 -
Mike
WA8BXN
