We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

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Messages - NJQA

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136
General Radio Discussion / FCC action against pirates
« on: July 15, 2020, 1349 UTC »
https://www.lexology.com/library/detail.aspx?g=15af862d-825a-410d-a8ed-3c5c74442b03&fbclid=IwAR0-814qM79lxZfv4kFqzo7t_2SBVOsyfp3KT5DUAVMMR22D5vt64rb5RSc

“Wilkinson Barker Knauer LLP
David Oxenford
USA July 13 2020

Pirate radio operators continue to be a problem – particularly in major metropolitan areas. The week before last, the FCC resolved two long-pending cases against pirate operators through negotiated settlements. In one case, the FCC last year initially proposed a fine of $151,005 for the illegal operation. After examining the operator’s finances, the Bureau agreed to a $4,000 fine now, with a penalty of $75,000 should the operator violate the law again (see this decision against an operator called Radio Concorde). In the second case, the FCC had proposed a $453,015 fine last year, but agreed to take $5,000 now, with penalty of $225,000 if the operator violates the terms of the consent decree (see the decision dealing with operator Radio TeleBoston). Last year, we wrote here about the much larger fines initially proposed for these two operators.

In both cases, the FCC seemingly recognized reality in taking the small upfront payments now rather than trying to collect huge fines that likely were beyond the ability of the operators to pay. The FCC also required the surrender of the operator’s equipment and a commitment to stay away from pirate radio for 20 years or face much larger fines. The big fines initially imposed in these cases were set even before Congress enacted the PIRATE Act early this year. The new law allows for fines on illegal operators of $100,000 per day, up to a maximum total fine of $2,000,000. Even without the full effect of the PIRATE Act, these cases show the deterrent effect of these large fines. They get an illegal operator’s attention, which can lead to the shutdown of these unauthorized stations, as happened in these cases. With the pandemic, we worry about even more illegal uses of the broadcast spectrum – and we will write more about that issue here tomorrow.”

137
I can't see how this is going to be fast enough for trades.  Most Data Center locations are based on fiber latency and it used to be in Milliseconds Now It's in Microseconds. it won't be long until it's in Nanoseconds. Even Microwave would be faster for trading.. So there must be something more to it.

tAC

Raft Technologies claims “milliseconds of advantage between exchanges oceans apart”.  Signals that travels through a medium like fiber or processing equipment will do so at “slower than the speed of light in a vacuum”.  The radiowave path is traversed at the speed of light.  Latency accumulates, so the more equipment and fiber they can cut out of the path by going direct, the greater the possible advantage. 

138
15 KW seems low for a serious SW broadcaster.  But maybe not inappropriate for a HFT data broadcast using log periodic beams for a point to point circuit.

Are DRM transmissions low enough latency to be consistent with high frequency trading requirements?

I’ve wondered what part of the FCC rules they were going to apply for a license under.  They certainly aren’t aeronautical or maritime and an experimental license no longer worked once they became operational.  Maybe this is their path.

139
Equipment / Re: The Best Active Loop Antenna 2019 = MLA-30?
« on: July 11, 2020, 1416 UTC »
Well said Chris!

You have to take most of these product reviews with a grain of salt, particularly if you aren’t familiar with the reviewer.

And we all tend to hear what we want to hear in these reviews and ignore the rest.  The product reviews on eHam are a good example of that....or Amazon product reviews...  A significant amount of those are just “noise” and deserve to be ignored...or from people with an axe to grind...

As Chris points out, too little attention is spent on the environment that the reviewer is in.  If his local RF noise level is high, then a product that has a low SNR may be indistinguishable from one with a high SNR.  Or if someone lives on top of a mountain with low horizons in all directions, then most any antenna is going to deliver a lot of stations.




140
General Radio Discussion / Re: Russian Kerosene Powered Radio
« on: July 07, 2020, 1307 UTC »
They aren’t kidding about these people being sick or even dead.  The LD 50/30 rule of thumb is that a dose of 400 to 450 REM in a short period of time will cause death within 30 days for 50% of those exposed.  If those sources were radiating at up to 1000 Roentgens, they picked up a significant dose while stripping them for metal.

141
General Radio Discussion / Re: RPi based ham radio wall clock
« on: June 21, 2020, 1200 UTC »
Gigaparts is selling a prepackaged version of this clock for an insane amount of money ($300).  You are starting to get into the realm of the Geochron cost.  Much cheaper to role your own...

https://www.gigaparts.com/veritium-hfclock-pi.html


BTW, one of the local hams made a similar comment about CSI’s astronomy software.  He said they produce good products.


142
SDR - Software Defined Radio / Re: RPi Ethernet question
« on: June 21, 2020, 1145 UTC »
To be clear, you are connecting the RPi directly to the device...a single ethernet cable with no switch or hub in between?  Is that correct?

Years ago it mattered if you had a normal ethernet cable vice a crossover cable for this situation, but it seems like most computers automatically sense and compensate for that today.  I have no idea if the RPi does this....maybe the Mac does and the RPi doesn’t?

143
General Radio Discussion / Re: RPi based ham radio wall clock
« on: June 20, 2020, 1136 UTC »
I’ve had this running for a week.  This was written up in the October 2017 issue of QST.

The Tom’s HW link is a little confusing.  It talks about a RTL SDR connected to the Pi when this has nothing to do with the clock.

Go to the author’s site for better info:
http://www.clearskyinstitute.com/ham/HamClock/


145

I’ve noticed the same difference between people in films from the early 20th century and today.  I agree that all of those factors played a role.  The other thing (as you mentioned) was that almost everyone smoked.  Smoking depresses the appetite...which also factors into the equation.

I think that it isn’t any one thing but a combination of increased sedentariness, more carbs, and smoking cessation that has resulted in the obesity problem.  A perfect storm.

146
ADSBexchange.com claims they do not filter postings at all.  Other web sites will filter some military and “sensitive” (e.g. celebrity, government, etc.) aircraft.

Of course if you have your own receiver, then there is nothing anyone can do to prevent you from receiving them, outside of turning the xmtr off.




147
I had the same thought when I saw the articles.

On the other hand, with all of these “defund the police” movements, maybe some of them would consider pushing the abolishment of blanket encryption of public safety transmissions in the interest of greater transparency?

148
General Radio Discussion / Electronic surveillance of protesters
« on: June 12, 2020, 2055 UTC »
News organizations are waking up to apparent electronic surveillance of protesters, as evidenced by ADSB transmissions.

Even if protesters put their phones in “airplane” mode to thwart surveillance, it still helps things as it impedes protester (agitator) use of phones for coordination of their activities...

 
 
https://www.cnn.com/2020/06/11/politics/spy-planes-george-floyd-protests/index.html
 
https://www.vice.com/en_us/article/y3zvwj/military-fbi-flying-surveillance-planes-george-floyd-protesters
 
https://www.aljazeera.com/news/2020/06/law-enforcement-surveilled-protests-drones-spy-planes-200611194618864.html

149
I wonder if it really is this easy?

It would seem to me that you have to have a properly formatted and addressed command to even get the system to repeat your transmission on the control channel.  If you had your own transmitter, it has to be stronger than the control channel.  Is it possible to disable all radios enmass, or must this be done on a radio by radio basis?  If it is radio by radio, then you need to collect radio IDs first.

Perhaps something that is possible in theory but far more difficult to implement in practice....

150
My first thought was “As if 2020 couldn’t get stranger....” but I guess this is really from 2015.

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