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Messages - Charlie_Dont_Surf

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226
Software / Re: Black Cat ALE Vacuum Cleaner 0.3.0
« on: April 17, 2023, 2126 UTC »
You hear that "giant sucking sound?"

https://youtu.be/VRr60nmDyu4?t=89

227
The RF Workbench / Re: Common mode supression
« on: April 17, 2023, 2035 UTC »
My english still very bad, but i should tell here about my experiments.
Your English is good enough to write this, which is reasonably high. I can see that you paid attention in English class.  :)


Common mode noise i measure between PC case and grounding in 9 floor building via 10:1 voltage divider - almost 13 volts.
http://hoshinokoe.ru/files/0ARTICLES/common_mode/interf_pc_case.jpg

OK, understood, however, I don't think that this is completely unusual and don't take this as positive proof that you have "a lot of noise". Your photos of the SDR screen do indicate that there is quite a bit of 1-30 MHz noise but I would not say that the oscilloscope image is indicative of the SDR waterfall images. That is, one does not necessarily lead to the other.

A few things to note:
1) Oscilloscope probes that are not grounded will often pick up (receive) noise like this.
2) I believe that you have connected the oscilloscope probe to a AC to DC power inverter output (but without a ground connection?). Understand that this output should be a high impedance node for anything above ~10 KHz (because the parasitic L increases the output impedance at higher frequencies), making the DC cable a very nice antenna, so the oscilloscope (which also has a high impedance input) will pick up quite a bit of noise from everything in the general area.
3) I think that the oscilloscope may not be connected to the same AC mains outlet (220V outlet) as some of the other items on your desk. This can create a ground loop that can create enough noise to show up on an oscilloscope by virtue of the different ground voltages at frequencies greater than DC.
4)  The oscilloscope probe is ~30 cm from the computer screen and there are likely many power inverters within ~1 meter of the probe.

So, again, it looks ugly but I wouldn't make a lot of decisions about what to do about it based upon this measurement that you show.


I still not measure this long balun, but it seems t be its better then only miniature transformer.
Today i made a Austin tranformer for HF to measure its reactance for common mode.
http://hoshinokoe.ru/files/0ARTICLES/balun_for_SWL/Austin_trans_isolation.jpg
...
Now i use "long" balun with my personal sdrs and parallel with web-sdr on my personal webpage.

You may want to consider using two antennas (e.g., the 8m wire and the 30 m wire) and a variable phasing network to be able to rotate (change) the phase of the two wires relative to each other to attempt to partially cancel some of the noise by making it out of phase.

228
Deltracks, rarely adding 'International'

Indeed. They have not used that since then.

229
A bit overmodulated when I tuned at 0755 and I could hear the Op turn down the audio gain at 0757. Still a bit distorted. Otherwise, a very good signal in France: SINPO 44454.

I'm hearing maybe a sung ID at 0757 but can't understand it.

0758 - The Monkees, "The Last Train to Clarksville"
0802 - Possible sung ID in Dutch?
0805 - "Hier is BeneLux Radio" in the middle of spoken announcements, some in German and some in Dutch.
0806 - "Hotel California".

230
C&W at tune in. SINPO 34343 on an SDR in France. A little bit of splatter from Deltracks on 6285 KHz.

231
SINPO 44444 on an SDR in France.

0727 - "Bittersweet Symphony'
0731 - ID in Dutch and English
0744 - Deep Purple, "Child In Time"

232
You may want to become acquainted with the entire list of shortcuts. Type 'h' or '?' anywhere on the screen to see the list of keyboard shortcuts. (The passband shortcut mentioned is on that list.)

You can also enter passband choices into the frequency selection screen, which might be easier in your situation: http://www.kiwisdr.com/quickstart/#id-freq-entry

To make things easier with the touchscreen, you may want to try mobile mode: http://www.kiwisdr.com/quickstart/#id-user-mobile
You can force mobile mode when you connect to a kiwi by adding " /?m " or " /?mobile " at the end of the URL. Example: http://echofox.fr:8073/?mobile (This is from the list of all the parameters that you can specify in the URL, including passband: http://www.kiwisdr.com/quickstart/#id-user-tune )






233
First noticed at at 0100. S9+15, SINPO 55444 on the K1VL SDR.

0101 - ID and email address. Undecoverradio AT gmail DOT com. "Broadcasting from the middle of nowhere."
0102 - "I'm Dr. Benway"
0103 - Two new KIPM shows tonight.

234
Just a weak carrier on the K1VL SDR at 0037 UTC.

235
Noted the startup on the waterfall at 0014 UTC. S9+10 on the K1VL SDR in Vermont.

Audio bandwidth appears to be >10 KHz. As William Hassig mentioned, there is some vestigial sideband (small amount of lower sideband) visible, which is a result of MRI's modulation process.


0014 - EDM
0047 - ID. "With the finest sound and the finest mix, you are listening to Mix Radio International on shortwave" in English.

236
Peskies / North American Fisherman 6960 USB 2250 UTC 07 APR 2023
« on: April 07, 2023, 2254 UTC »
Quick convo about the troubles of the day. Off at 2252.

237
2238 - "Million Dollar Weekend" Jingle. SINPO 55555 on a New England SDR.

It seems to be a Million Dollar Weekend every weekend. If that is so, why am I not wealthy?  ;D

2240 - ID, thanks me for the report.
2245 "Love Potion Number 9"

238
2125 UTC-OFF

Not sure if they were permanently off or not. There is a USB station that has been on this frequency since at least ~2155 UTC

2250 - SSTV and "Cluck Cluck".
2255 - Our friend on the mic: "Having realized that I went about an hour early, I'm going to start this over." Into guitar music. Joe Satriani?

239
1842 - S9-ish on an SDR in the mid-Atlantic US. A little bit of audio distortion on low frequencies.
2014 - Still on the air. I wasn't aware that RNYI had an internet stream and yes, Johnny Lightning does have "the gift of gab", doesn't he?
2039 - Tone sequence and "WBOG" jingle. Carrier off the air.

Caught a mention of "Psychotic piece of S**t"  ;D

Hey, hey, hey! Take it easy. I'm right here reading this, for crying out loud.  :D

240
Professor Plum wouldn't be related to P.G. Wodehouse would he? Wodehouse was a man who made a living on stories about fools. He wasn't a professor but his friends called him "Plum". If you can find it, read his short story, "The Great Hat Mystery". It explains a lot about  the British upper class.
Professor Plum and Miss Scarlett are on the show together. I don't have a clue about the other one.

Colonel Mustard thinks that there might be a candlestick involved.

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