Hi LF Looks like a "Trademark" seems popular, along with "Smiles" and "HNY"....etc. I have seen them on the Twente SDR web RX waterfall. Hellschreiber style of transmission I think. Look on Hans Summ
Look like a carrier modulated by a harmonically rich waveform, which reduces in frequency...... then after a time the carrier is modulated by a harmonically rich waveform that now increases in freque
They come from Alpha Centauri and mean peace..... :-) 73s Roger G3XBM 2010/1/15 Rik Strobbe <[email protected]> I have seen them on the KL1X 500kHz grabber once or twice 73, Rik ON7YD - OR
Looks like variable frequency drive interference from devices like pumps, elevator motors, cranes etc. Very musical if listening on SSB and strong enough. Laurence KL 1 X/5 From: hudsonville@btintern
Hi John, Markers were every 15 seconds. Also the whole thing was repeated every 5kHz going up in frequency. If if you look carefully the tips of the whiskers are connected. My thought after reading L
and .... http://www.hanssummers.com/qrss/qrssqrv/qrssqrvfinale.html...... but the Cats Whickers take the cream!!! 73 es GL petefmt -- On Fri, 15/1/10, M0FMT <[email protected]> wrote: From: M0FMT <m0
I see similar QRM . centers for me at 180 Kc and will come and go the interference will be noticed up to 500 Kc. Usually a short carrier happens first the burst usually lasts for 10 sec. I figure min
I have seen them on the KL1X 500kHz grabber once or twice 73, Rik ON7YD - OR7T At 13:40 15/01/2010, you wrote: Hi All, Anyone come across these? http://www.m0lmh.co.uk/grabs/CatWhiskers.jpg I have se
Too glib I can visualise the whisker pointing in the direction of time but not the mirror image how does that work. Please explain? How can the spread of sideband frequencies colapse onto the start e
At G7NKS, the biggest culprit for RFI is the plasma screen in the lounge! The XYL is watching the "Witless Silence" and Jonathan Woss and it causes havoc from LF to 20m. It's an old (2001) NEC displa
OOOK I'll buy that. Lee points out the faint joining lines of constant frequency during period between expansion and contraction of the side bands. Indicating multi-frequency (harmonic) modulation at
Hi All, I regularly get that type of visual image on my captures along the line of the harmonic on 504 kHz, example is attached which occurred on the 12th of this month. I have seen the effect again
Here's one caught when I ran the 500 kHz grabber in spring 2008. I believe Laurence's explanation is correct. During acceleration of the motor, the dutycycle on the constant chopper frequency is bein
if they want to come in peace they shouldn't cause QRM ;-) 73, Rik ON7YD - OR7T At 15:07 15/01/2010, you wrote: They come from Alpha Centauri and mean peace..... :-) 73s Roger G3XBM 2010/1/15 Rik Str
Amateurs using the washing machine??? Good god man....heresy!!! With best regards Jim Dr. James Cowburn Hi John, Markers were every 15 seconds. Also the whole thing was repeated every 5kHz going up i
