Search found 15 matches

by rjmura
Sun Feb 28, 2021 7:00 pm
Forum: Troubleshooting Help
Topic: RTL SDR NOAA weather sat decoding
Replies: 11
Views: 1725

Re: RTL SDR NOAA weather sat decoding

what i meant was to write down all your settings, such as text options, type of image, recording options, so you can set up wxtoimg the way you like it. when you reinstall wxtoimg, all the settings will return to defaults. try installing wxtoimg in a different directory. i used to have it in my prog...
by rjmura
Tue Feb 16, 2021 9:43 pm
Forum: Troubleshooting Help
Topic: RTL SDR NOAA weather sat decoding
Replies: 11
Views: 1725

Re: RTL SDR NOAA weather sat decoding

try reinstalling wxtoimg, vb-audio, and sdr#. take down all your wxtoimg settings before you uninstall it.
by rjmura
Sat Feb 06, 2021 9:41 pm
Forum: Troubleshooting Help
Topic: RTL SDR NOAA weather sat decoding
Replies: 11
Views: 1725

Re: RTL SDR NOAA weather sat decoding

had the same problem about 4 months ago, after over a year without any problems. can fix it by changing the audio sampling rate going into wxtoimg to 11025 Hz, as mentioned in its help file. don't remember exactly what i did but i have the output of vb-audio virtual cable set to 11025 Hz in the vb c...
by rjmura
Sat Oct 03, 2020 10:09 pm
Forum: Antennas
Topic: best v-dipole height for noaa satellites
Replies: 2
Views: 2365

Re: best v-dipole height for noaa satellites

i'm retracting my previous recommendation, which was based on using a tripod at heights of 90 to 104 cm. since that time, i saw two posts recommending placing the v-dipole 44 cm above ground. the only thing i have that low is a foot rest for some outdoor furniture. placing my v-dipole on the foot re...
by rjmura
Mon Sep 07, 2020 9:30 pm
Forum: RTL-SDR Discussion
Topic: Using the dipole antenna kit - setting correct lengths
Replies: 1
Views: 874

Re: Using the dipole antenna kit - setting correct lengths

the total length of a half wave dipole should be a half wavelength. so for 437.8 MHz, the total length (both sides) is 32.7 cm, and from center to one end is 16.3 cm. the short antenna fully extended has a total length of 32 cm, which should be close enough. the attached vna plot of the short antenn...
by rjmura
Sun Sep 06, 2020 8:53 pm
Forum: RTL-SDR Discussion
Topic: Meteor M2 decoding
Replies: 1
Views: 1013

Meteor M2 decoding

was able to decode Meteor M2 lrpt up until a month ago. now, its signal bandwidth has increased from about 100 kHz to 250 kHz, and the constellatiion has changed from 4 dots to more of a donut with a dot in the middle. unable to decode. am running dde client v1.2, demodulator v 2.3, and decoder v 5....
by rjmura
Mon Jul 20, 2020 10:48 pm
Forum: Antennas
Topic: best v-dipole height for noaa satellites
Replies: 2
Views: 2365

best v-dipole height for noaa satellites

If you use a tripod for your v-dipole, you may have read that it should be 1 meter above ground. in my case, 92 cm gives nearly noise free reception above 15 degrees elevation. you should try varying your antenna height by 1 or 2 cm for your location. the ground reflection changes the antenna patter...
by rjmura
Mon Aug 12, 2019 2:45 am
Forum: RTL-SDR Discussion
Topic: Newb trying to receive Weather Faxes
Replies: 4
Views: 4223

Re: Newb trying to receive Weather Faxes

what program (e.g., sdr#, sdr console, hdsdr, sdruno) are you using for your radio? for step 1, when you run your sdr radio, look for a configuration menu (like a gear) that shows "quadrature sampling". if you click on the drop-down box, you should see something like "q branch". step 2 is the noaa w...
by rjmura
Sun Aug 11, 2019 3:24 am
Forum: RTL-SDR Discussion
Topic: Newb trying to receive Weather Faxes
Replies: 4
Views: 4223

Re: Newb trying to receive Weather Faxes

i don't have a mac, but you may be able to figure out how to do it by seeing how i do it on a pc. 1. you can tune your sdr below 28 MHz by direct sampling the Q branch. on sdr sharp, this means changing the sampling mode from quadrature sampling in the configure source menu. 2. go to https://www.nws...
by rjmura
Tue Jul 30, 2019 1:27 am
Forum: RTL-SDR Discussion
Topic: Max Volume
Replies: 14
Views: 8611

Re: Max Volume

you may have inadvertently created a ground loop and induced 60 Hz power into the system. try disconnecting the ground to the shield. i need to crank up the volume all the way in sdr# for a green signal of 75% in wxtoimg. if i lower the volume in sdr#, the level in wxtoimg also drops up to the point...