Radio Q&A

Are cell phones dangerous to children?

I’ve heard cell phones are bad for babies or infants. Why is this, and what about devices such as radio or tv top antenna?

Should I keep them away from my baby? And, if these things are indeed dangerous, then what would be a safe distance?

1 comment - What do you think?  Posted by Admin - September 20, 2009 at 07:15

Categories: Radio Q&A   Tags: antenna, radiation danger, radio, radio requency emissions, rfi danger, safe distance

What's a good VHF/UHF ham radio antenna?

I will be purchasing a Yaesu FT-7800 dual band VHF/UHF radio in the next couple of weeks.

I am seeing all kinds of antennas being advertised with different connectors (N-connectors, PL-259 plugs, BNC and SMA fittings). They are quoted at various dBs of gain, and different wavlength designs. It is confusing.

Does having a higher DBI get you better range? And does buying a longer antenna mean you are going to get better receive and transmit signals?

I will be purchasing a vertical antenna for the two bands and was just looking for a little bit of help to understand what these things actually mean when you are operating the radio equipment.

The set up will be mobile, in a vehicle.

1 comment - What do you think?  Posted by Admin - August 15, 2009 at 08:01

Categories: Radio Q&A   Tags: dbi, dual band radio, little bit, radio antennas, recieve, vertical antenna, waves, yaesu ft

Radio Interference to a TV set

Radio frequency interference (or RFI) can really destroy the good relations between neighbors. So it is important that it gets sorted quickly, if possible.

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5 comments - What do you think?  Posted by Admin - August 10, 2009 at 05:32

Categories: Radio Q&A   Tags: high pass filter, low pass filter, radio frequency interference, radio operator, rfi, television interference

Learn About 2-Way Radios

Is there any way to boost the operating range of a 49 MHz toy Walkie Talkie?

And if there isn’t a way to boost one of these low-powered radios, then why was it made like that?

Is there any other device with that frequency but longer range? The only other devices I know are old cordless phones and R/C Toy cars.

I already have FRS/Gmrs and CB Radios that are supposed to be able to work over a distance of 10 miles. But that little 49 MHz two-way radio I bought is only a toy.

If I had the knowledge to build my own Walkie Talkie, would there be a way for me to make the range at least two miles?

I would like to learn about two way radios.

I hate the fact that the government won’t let us just do what we want to do. They expect us to buy a license for this and a license for that. It is so annoying.

I just want to learn basics of a walkie talkie, then go to the big stuff like ham radios.

I’ll be happy just to start with something simple

1 comment - What do you think?  Posted by Admin - August 6, 2009 at 03:45

Categories: Radio Q&A   Tags: cb radios, cordless phones, frs gmrs, GMRS Radio, ham radios, learn 2-way radio, learn amateur radio, toy cars, walkie talkie

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Connecting Up a CB Radio