Search found 5 matches

by StephenT
Sat Apr 15, 2017 1:30 am
Forum: SDRuno
Topic: New user question - please see my screenshot
Replies: 9
Views: 2138

Re: New user question - please see my screenshot

Hey Andy. Yes indeed and unfortunately, the longwire comes directly into the shack and the SDR. HOWEVER, I am going to build some 9:1 ununs and get that wire back outside and bring coax into the shack. I'll order out the toroids next week and experiment with several to see which mixture gives me the...
by StephenT
Fri Apr 14, 2017 4:03 pm
Forum: SDRuno
Topic: New user question - please see my screenshot
Replies: 9
Views: 2138

Re: New user question - please see my screenshot

LAPTOP UPDATE: no signal difference on the receiver when turning off the Latitude. The Latitude runs a Core i5 and the Inspiron runs an older Pentium Dual Core. I would assume that is the primary difference in the noise level since the i5 runs with much less power; the power supplies appear identica...
by StephenT
Fri Apr 14, 2017 3:53 pm
Forum: SDRuno
Topic: New user question - please see my screenshot
Replies: 9
Views: 2138

Re: New user question - please see my screenshot

Further investigation revealed a noise signal of 12db strength being generated either the by the laptop running the software or the SDR itself. See the attached screenshot. Screenshot (4-50%).gif Looking at the CPU usage at 10MHz and Decimation 1, I think that noise in my receiver is being generated...
by StephenT
Fri Apr 14, 2017 2:21 am
Forum: SDRuno
Topic: New user question - please see my screenshot
Replies: 9
Views: 2138

Re: New user question - please see my screenshot

My present antenna is a longwire, end-fed to the high impedence input of the SDR. I plan to make up several 9:1 unun's with different cores (considering 2,6,31,43,52,61) and switch between them depending upon the frequency range I am observing. Probably a bit overkill, but they are inexpensive and e...
by StephenT
Thu Apr 13, 2017 6:03 pm
Forum: SDRuno
Topic: New user question - please see my screenshot
Replies: 9
Views: 2138

New user question - please see my screenshot

What are these recurring signal peaks? Do i have an incorrect setting?

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