“The Future” of Experimental Radio

Do you remember a few times in your life thinking that someone might be thinking what your are thinking?

Though we are at the bottom of the worst sunspot cycle  in my life (6 decades) I still check the higher bands before I warm up the key.  Many times throughout 2018 when I checked to see if 10, 12, or, 15 meter bands were open I would not hear a single CW signal but there would be multiple +20 signals amongst the “digital” frequencies. 

Shouldn’t +20 dB from stations that brag about being able to run less than 5 watt be proof that the band is open?  Yes!   So I call CQ for 15 minutes and not a single reply.  How could this be? 

I occasionally pondered various hypotheses. 

Today, I accidentally discovered that Kirk Kleinshmidt had written a very good explanation of this situation in early 2018.  The article has been posted, with permission, by EI5DI.   Did Joe Taylor K1JT Destroy Amateur Radio?

Comments?

Commenting on “The Future” email

I have received this email, or very similar, several times this year.  Obviously written by someone (or someoneS) that do not have basic understanding of physics, electricity, etc.
My comments are in red.

Subject:
Very Interesting future Predictions

Pick your job carefully if your (you’re) young

The Future  ??

Auto repair shops will go away.

So did “muffler shops”

A gasoline engine has 20,000 individual parts.  I do not believe that number, I would believe 2,000 
An electrical motor has 20. (another number I do not believe.  Have you ever opened up an electric motor? ) Electric cars are sold with lifetime guarantees and are only repaired by dealers.
It takes only 10 minutes (I do not believe that number) to remove and replace an electric motor. Faulty electric motors are not repaired in the dealership but are sent to a regional repair Read More

Ham Club Tips: How to Ruin Your Hamfest

How to Ruin Your Hamfest (swapmeet)

    1. Find someone that is completely unfamiliar with your state AND cannot read a map.  Then put him in charge of hamfest “talk-in”.  Your club can earn bonus points if this person drinks an entire fifth of whiskey before the doors open.
    2. If you unfortunately find that the only volunteer to run “talk-in” can actually read a map it is permissible to use this volunteer.  He must, however, be provided with maps that use names for all roads which do not match roadsigns.  For example, the hamfest is on U.S. Highway 441 and all intersection signs show 441, the “talk-in” volunteer shall only refer to this as “Range Line Road”.  The words “four fourty one” must never be uttered.

Read More

$2,800,000 fine for bogus “amateur radio” transmitters for drones

June 5, 2018, the FCC announced a $2.8 million fine against Hobby King for repeatedly selling mis-identified un-certified transmitters.  The transmitters, mostly, were advertised for sending live video from unmanned aircraft back to the ground for viewing by the U.A.S. operator.

Hobby King misled website visitors into believing that these transmitters were compliant with FCC regulations for use by licensed Amateur Radio Operators.  The transmitters did not even operate on frequencies which are available to licensed operators!

The FCC had looked into the matter and corresponded with Hobby King in the past.  F.C.C. informed Hobby King that these devices were not compliant Read More

FCC confiscates equipment from N.Y. pirate broadcaster

WASHINGTON, May 15, 2018
Taking action against a pirate radio operator, Federal Communications Commission agents, in coordination with the U.S. Attorney’s Office for the Southern District of New York and the U.S. Marshals Service, seized radio transmission equipment from an unauthorized radio station on April 10, which was operating illegally in Manhattan.  The FCC’s Enforcement Bureau has been leading an effort to crack down on this illegal activity, resulting in unlawful broadcasts going off the air, seizure of equipment, fines against pirates, proposed fines against pirates and property owners actively aiding pirate radio operations, and numerous other enforcement actions.

“Pirate radio stations are illegal, as they operate without an FCC license, and cause real harm. 
These stations can cause interference to legitimate, licensed broadcasters and can prevent those broadcasters from delivering critical public-safety information to listeners,” said Rosemary Harold, Chief of the FCC’s Enforcement Bureau.  “We are pursuing multiple legal routes to stop pirate broadcasters and this seizure action in Manhattan is one of them. We thank our partners in the U.S. Attorney’s Office for the Southern District of New York and the U.S. Marshals Service, and we’re particularly thankful for the great work of FCC field agents in combatting this problem.” 

“Rumba FM,” which broadcast on 95.3 FM from a high-rise apartment building in Manhattan, was operating without an FCC license, as required by law. The FCC issued multiple warnings to the illegal operators but the radio station continued to broadcast. Pursuant to a federal court order, authorities seized equipment operated by the illegal radio station at that station’s antenna location on St. Nicholas Avenue in Manhattan.

 

The Communications Act of 1934 prohibits the operation of radio broadcasting equipment above certain low-intensity thresholds without a license issued by the FCC. The Act authorizes the seizure and forfeiture of any electronic or radio frequency equipment used to broadcast without an FCC license. The number of available radio frequencies is limited, and unlicensed broadcasting can interfere with the broadcasting of legitimate licensed radio stations, potentially causing chaos in the radio spectrum.

 

In an action to seize a pirate radio station’s equipment, the FCC performs the initial investigation. Once the FCC has built a case against the station, the matter is referred to the relevant U.S. Attorney’s Office, which is then responsible for filing the case and obtaining a warrant to seize the illegal radio equipment from the court. The U.S. Marshals Service is responsible for executing the warrant and seizing the pirate radio station equipment, with FCC personnel provide technical assistance during the seizure.

Another possible cause of T.V.I. ?

“T V I” means Tele Vision Interference.  

The most common causes of TVI are bad powerline insulators, poorly designed LED bulb circuits, poorly designed transmitters.  And, sometimes, the receiver is just overloaded by a nearby strong transmitted signal.

I think I found another source of TVI when I stopped in Douglas, Wyoming and spotted this.

It’s just a cellphone snapshot, I wish I had a better image for you.   But in the center of the image you can see a UHF television receiver antenna….  and it is mounted directly to the radiating element of an 11 meter CB transmitter antenna.

How to select the proper fuse for your circuit

Found a good article on selecting fuses for your project on a website called “Power Electronics”

Here is a snippet from that article, listing the design factors explained in the article.

Proper selection of an input fuse for a dc-dc converter involves 
understanding and consideration of the following factors:
 1. Voltage Rating
 2. Current Rating
 3. Interrupting Rating
 4. Temperature Derating
 5. Melting Integral (I2t)
 6. Maximum Circuit Fault Current
 7. Required Agency Approvals
 8. Mechanical Considerations