General Category > Huh?

How "free" is the 6.483 MHz.?

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Intersoundradio:
Thank you all for the reactions! :)
But this frequency is not so strange as it looks. In the past, the SW-pirates in Europe were only broadcasting in the 76-, 48- and 41-meterbands, but in the last years you see more and more stations looking for another frequency. For example, Pinkpanther radio is on the 6.803 MHz., Cool-AM is mostly to find on the 6.735, Laser Hot Hits on the 4.026, and there are other stations, who prefere frequencies like the 6.550 (like Radio Ramona did a few years ago), etc.
Also the 5.800 MHz. or higher is quite popular in the last years. The same with frequencies above the 6.900 MHz.
Dangerous SW-frequencies in the 48-meterband are 6.215, 6.268, 6.312, 6.313, 6.331 (emergency frequencies).
Almost every European pirate are transmitting in the "normal" AM-mode.
But I get the answers where I'm looking for. Thanks! The frequency here shall be now 6.480 MHz. 8)

Intersoundradio:

--- Quote from: glimmer twin on March 11, 2014, 1442 UTC ---Malaysian Navy station 9MR uses 6483. Not sure if that is an issue for you (power/location ??). Also there was a Globe station on 6484.5  Tianjin Radio (China) but I don't know what their status is.

--- End quote ---
I almost forgot to tell you my country... I'm living in the Netherlands and the power here is 30 Watts AM. I'm working with a transmitter, which can make a signal on the 48-, 76- and MW-frequencies. The antenna is a "litze" longwire about 24 meters and 9 meters high. The earth is 70 meters copperwire in the ground. The antenna is tuned with a selfmade LC-antenna tuner. ;)

ka1iic:
As Chris said being on an 'out of band' frequency is a serious set back unless you advertise <sigh>

Just how many on here can claim to have heard any of the 'Radio Clandestine' broadcasts up in the 21 meter shortwave broadcast band back in the 70's -80's etc etc ???  they were using a kw+ station... I heard them once but only because I was visiting the station (Unknowingly) once upon a time... I was looking at the transmitter at the time of the broadcast too...  believe it or not...

73 Vince KA1IIC

ff:

--- Quote from: ka1iic on March 12, 2014, 1938 UTC ---Just how many on here can claim to have heard any of the 'Radio Clandestine' broadcasts up in the 21 meter shortwave broadcast band back in the 70's -80's etc etc ???  they were using a kw+ station...

--- End quote ---

I never did Vince, and back in those days I did half-hourly sweeps of 4 or 5 different bands.  I caught RC several times in the 3450 area and I know from talks with the op that they used 32M (9-9.5) and 19M (15-15.1) occasionally.  Nowadays most folks just don't do much searching.  Its a shame - there's so much unused "real estate" out there.

ChrisSmolinski:
I think that SDRs are making it easier for listeners to check some of the less traveled parts of HF. I run (and record) my SDR from 6800-7000 each night, so I will pick up pirates that are not on 6925 but are still somewhere in the 43 meter band. 6880, for example, has been active lately. In theory you can record even larger portions of HF, but the disk storage requirements go up proportionally. Plus the time to go through the recordings.

My memory is that back in the day (yes, I have a Radio Clandestine QSL, I think from the 41 meter band) pirates were more concerned about the FCC, and tended to be more random with their frequency selection. Always using the same frequency as everyone else was not a good idea. The upside to this (even today) is that you get some people tuning in who otherwise would not hear your transmission.

Back in the 80s and 90s I recall the lower part of 3 MHz band being used on a regular basis, and of course both above and below the 40 meter ham band, plus just above 15 MHz. And MW was a lot busier back then as well.

For whatever reason, that isn't the case today, and most activity is confined to the 43 meter band. And just a few frequencies, really. My guesses would be:
1. It maximizes the number of listeners. Just use 6925, and you're almost certain to be heard by someone.
2. The reduced fear of FCC action. 
3. Propagation wise, it's a pretty good choice. You get out a few hundred miles in the daytime, and at night a few thousand miles (although like a donut with a skip zone around the transmitter location). Noise levels are not too bad, except perhaps in the summer if there's storms around. 

If you want to compromise on one band, it's really the best  way to go.

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