(Asked by Rory from County Kildare, Ireland)
Before all you regular readers point out that Margot from Brighton asked me a very similar question last month, let me just say that I’m answering this one simply because of the way Rory chose to phrase his question.
In life, we are constantly bombarded by instructions, orders and indefinable ‘rules’ (some of which are written down and legally enforced, while others still are unwritten and socially enforced). I’m sure I’m not the only one who, like Rory from Kildare, wonders what would happen if some of those rules were to be broken. More »
(Asked by Paul from Dublin, Ireland)
Y’know, I visited your fine city of Dublin many years ago and had a wonderful time. It is a truly magical place.
Anyway, on to your question….
NASCAR drivers use a unique radio system that is built in to their crash helmets. These are occasionally customized to suit the individual wearer. In addition to this, there is a push-to-talk button (exactly like the one found on a walkie-talkie), which is situated in the steering wheel. A wiring harness connects the various components together and a separate battery operates the whole thing. The signal is broadcast via a whip antenna that is attached to the roof of the car. In this fashion, NASCAR drivers are able to communicate with pit crews. More »
The real reason is that the signals generated by your radio receiver (yes, it generates signals as well as receives them) can interfere with the aeroplane’s navigation equipment.
In an article for ‘The Straight Dope’, published in 1987, Cecil Adams (who ran a similar, but far superior, column to this one) explained it far better than I could. He said,
“Most modern receivers use something called a “local oscillator,” which is sort of an internal transmitter. The oscillator generates signal A, which is mixed with the somewhat raw incoming signal B to produce nice, easy-to-work-with signal C. There’s usually some sort of shielding around the oscillator, but it’s not always effective and sometimes errant signals leak out to make life difficult for other radio equipment nearby. If the other equipment happens to be an aircraft navigation device, somebody could wind up digging furrows with a $25 million plow. So do your bit for air safety and bring a tape player instead.” More »
Oil and gas are natural resources, but obtaining them isn’t as simple as planting a seed in a patch of arable land. Today, hundreds of thousands of miles of oil and gas pipeline run all over the world, sometimes covering some of the most inhospitable environments known to man.
Pipelines that run above ground offer many advantages to oil & gas companies. They are cheaper to build, easier to repair, far simpler to maintain and a lot safer for the environment. However, that same environment also has no qualms about wreaking havoc on the lines, neither do politically motivated saboteurs or occasional wanton vandals who commonly make their presence felt in such places. A pipeline is a complex and intricate operation, which means that in order for everything to go right, nothing can be allowed to go wrong. More »
To answer your question (that is, after all, why I’m here): It depends entirely on which models you are planning to use. For example, if you had two PMR446 variants that were both on the same band, they ought to work fine (even if one was Kenwood and the other was Motorola).
If two radios are the same basic type and set to the same channel, then I don’t personally see why they wouldn’t work. However, if they aren’t of the same type, then they probably won’t work, it’s that simple. More »
2012 is over and done with and we would like to wish one and all a happy Christmas and a Happy New Year
Most of us don’t really think about it, but warehouses play an important part in our lives. When we shop at a supermarket, visit an electronics store, or order online from a major retailer, we are buying items that, at one time or another, have to be stored somewhere.
Its not just completed products, either. Once an item has been manufactured, it must then be stored before transit, meaning that most factories incorporate a considerable amount of space to the storage of completed products, ready for shipping. More »
SCHAUMBURG, Ill. – Nov. 19, 2013 – Motorola Solutions, Inc. (NYSE: MSI), a leading provider of mission-critical communication solutions and services for enterprise and government customers, today announced the RFD5500 UHF RFID sled that can instantly turn the MC55N0, MC55A0, MC65 and MC67 mobile computers into lightweight, rugged, handheld RFID readers that deliver fast read rates and improved productivity for retail storefronts, warehouses and field applications. More »
That’s actually a pretty good question. Good quality wireless earpieces are available, affordable and would be far more inconspicuous than the classic ‘wired’ models. So why don’t the secret service make their presence a little more, well, secret?
The main reason is largely psychological in nature (though there will be a technical component later on). You see, if a potential troublemaker looks into a crowd and sees nobody there that he/she identifies with as a threat, then said troublemaker will be far more likely to start making trouble. However, if they notice secret service guys using their trademark earpieces, then they might think twice about it and a lot of unpleasantness can actually be avoided. More »
Editorial – We now have said for a while, Bluetooth is the future for two-way radios and headphones. With so many different incarnations of this tech to try and adapt it for that walkie talkie market, no one has yet got it sufficiently little to use covertly enough. This analysis from a motorcycle website may give us an indication of how the technology is progressing.
Sena SR10 Two-Way Radio Adapter Review with Midland Radio BT Next and Midland Two-Way Radio More »