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noob question

J

jcordle

Member
Aug 19, 2013
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OK I am just getting into all this. I've been driving a truck for 5 years.
I know the 40 channels on cb. just bought a connex cx3300hp
Which I guess is an 11 meter. Now reading on here I'm hearing about 2,10,11,12 meters
Wth does all that mean? And what is the difference?
 

2m, 10m, 11m, & 12m is a radio users shorthand for different frequency ranges. For example, 2m is the 144-148mhz range and is a Ham band. 11m is shorthand for 26.965mhz to 27.405mhz, the CB band. Different frequencies also for 12m & 10m - and so on.

The reason they use 'm' is for meters. Because the actual physical length of these frequencies have an approximate length, and they measure that length in meters. For example, 11m (the CB band) is the length in meters in which one single full wavelength occurs at those frequencies. A full wavelength is therefore about 36 feet +/-; or 11 meters.

A 1/4 wave antenna is ~9 feet long, a 1/2 wavelength antenna is ~18 feet long, and a 5/8 wavelength antenna is about 22.5 feet long. All fractions of a full wavelength of the 11m band.

To add some more insight here, is that when the wavelength ('2m' - example) is shorter; the frequency is higher. The 70cm Ham band is at 440mhz and is only 27.5 inches long - while at the other extreme the 160m band has a very long frequency period - but is only 1.8mhz in frequency.

Hope this helps some . . .
 
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OK now does the connex have an additional 40 channel's times 6 for the FM also or is the FM only one channel?
 
FM is 'frequency modulation' mode. AM is 'amplitude modulation' mode. SSB is 'single side band' mode, and there are two of these, upper side band (USB) and lower side band (LSB). These are all modes of receiving and transmitting. Not any one frequency. Theoretically, you can transmit or receive on any frequency in any of these modes. The radio itself can be put in these different modes and only receive and transmit with others that are using the same mode of operation. These modes all interpret the electrical signals differently from each other.
 
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OK but I have no freq counter or any way to change the freq but for the 40 channels
On the radio. so I am assuming the FM works in whatever so called channel I put it in?
And this brings up another question? I have been told there is a freq counter that plugs into the back of this radio. would that also allow me to change the freq?
 
jcordle said:
OK but I have no freq counter or any way to change the freq but for the 40 channels
On the radio. so I am assuming the FM works in whatever so called channel I put it in?
And this brings up another question? I have been told there is a freq counter that plugs into the back of this radio. would that also allow me to change the freq?
Click to expand...

That's right; the radio 'channels' are all pre-sets. The radio has other radio freqs that are above/below 11m/CB regular 40 channels on the 'band switch'. Adding a frequency counter will help you see what freq you are on if/when you change the band switch.
 
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Remember that transmitting outside the 11M band is illegal. The radio you have is also illegal but the chances of ruffling feathers is slim to none if you stay in the normal 40 CB channels. You play at your own risk once you start transmitting onto the HAM bands. There are many who would gladly turn you in if they realize you are operating on their frequencies without the proper license to do so. Just giving you a heads up. I also have an export radio and an amplifier, so I don't want you to think I'm shouting from a soap box. I am just trying to respect the hobby and our licensed counterparts (HAM operators).
 
The radio you have is also illegal
Click to expand...

The radio is NOT illegal.
You can have, own, listen to it, whatever as long as you do not TRANSMIT on it in the CB band or the Ham bands without your ticket.
Study and get your ticket and you can use it all day long on Ten meters.

The Problem with the radio you are talking about is that it is limited to AM and FM modes of operation only, not useful as the AM/FM portion of Ten is above 29.00 MHz, outside of the range of the radio.
You will find most AM activity around 29.200 and FM at 29.600
The lack of repeater offsets makes it useless for FM repeater work.
I would pass on that radio and save a few more coins and get a radio with SSB.
Much more useful.
I encourage you to study and get you Ham Lic.


73
Jeff
 
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As a long time truck driver i like that your asking questions here rather than on the road.
Use your radio on D assuming it's been converted. Or get the ham ticket as suggested.
 
AudioShockwav said:
The radio is NOT illegal.
You can have, own, listen to it, whatever as long as you do not TRANSMIT on it in the CB band or the Ham bands without your ticket.
Study and get your ticket and you can use it all day long on Ten meters.

The Problem with the radio you are talking about is that it is limited to AM and FM modes of operation only, not useful as the AM/FM portion of Ten is above 29.00 MHz, outside of the range of the radio.
You will find most AM activity around 29.200 and FM at 29.600
The lack of repeater offsets makes it useless for FM repeater work.
I would pass on that radio and save a few more coins and get a radio with SSB.
Much more useful.
I encourage you to study and get you Ham Lic.


73
Jeff
Click to expand...

Yeah because we all just listen with our exports and amps. Really? That is just foolishness. If there is no device to prevent transmit on 11M than it is illegal. If it is capable of transmit on 11M without a certification by the FCC it is illegal.
 

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