“A recent article in The New York Times reported that many garage door openers and keyless vehicle entry fobs in an Ohio town near Cleveland mysteriously stopped working. While the article invoked The X-Files and hinted initially that a NASA research center somehow could be involved, the cause was not so much mystifying as arcane.
“Garage door repair people, local ham radio enthusiasts, and other volunteer investigators descended on the neighborhood with various meters,” the May 4 article by Heather Murphy recounted. “Everyone agreed that something powerful was interfering with the radio frequency that many fobs rely on, but no one could identify the source.”
More than a dozen residents reported intermittent issues getting their key fobs and garage door openers to operate, and most lived within a few blocks of each other. At one point, the local power utility started shutting off power to areas where the strongest RF signal was detected, but the signal persisted. Dan Dalessandro, WB8ZQH, a TV repairer, was among several hams who investigated. He initially picked up “little blips” on a signal detector, but finally, on one block and at a particular house, the signal was quite loud.
“The source of the problem was a homebrew, battery-operated device designed by a local resident to alert him if someone was upstairs when he was working in his basement,” the Times reported. “It did so by turning off a light.” The individual, who, the article said, has special needs, was not identified for privacy concerns. The inventor, who had no malicious intent, had no inkling that his device was wreaking havoc on the neighborhood until a North Olmstead City Council member and a volunteer knocked on his door. The device operated on 315 MHz, the frequency many keyless-entry devices use under FCC Part 15 rules. The device’s battery was removed, the signal stopped, and all who were involved breathed sighs of relief”
New release of portable transceiver IC-705 that covers all modes including DV (digital voice) from HF to 430MHz band .
IC-705 Product name / model name Amateur Radio HF / 50/144 / 430MHz <SSB / CW / RTTY / AM / FM / DV> IC-705 Suggested retail price 124,800 yen +... Read more
U4 Digital & Analog Smart Radio 1．Description A new generation of Comart U4 series Digital & Analog smart portable, which was taken as... Read more
Description : BAOFENG UV-82 Dual Band Handheld Transceiver Radio Walkie Talkie The latest radio to come from Baofeng! This radio has upp... Read more
With the National Hurricane Center (NHC) expecting Tropical Storm Isaias to become a hurricane again later today and make landfall this evening, the H... Read more
Russian cosmonauts on board the International Space Station plan to transmit slow-scan television (SSTV) images on August 4 – 5. The SSTV images will... Read more
The Hurricane Watch Net (HWN) activated on 14.325 MHz on July 31 at 1500 UTC as Hurricane Isaias [pronounced: ees-ah-EE-ahs] heads toward the US on an... Read more
New Technician HF Privileges Defined: ARRL board accepts final recommendations of the Band Planning Committee
Source:https://swling.com/ During this session, the [ARRL] Board took the following actions: Accepted the final recommendations of the Band Planning C... Read more