Can someone please explain to me the difference between a CB with ssb/usb/lsb such as a 148GTL and a 10 meter export radio such as a Connex 3300 with a dial that's marked A/B/C/D/E. I know that a CB operates on the 11 meter frequency and of course an "Export" on the 10 meter frequency but, if both radios had exactly the same amount of transmitting power, would one get out farther over the other? I'm really curious to know.
It seems like a lot of the tractors that I drive, the guys have either a SSB/USB/LSB CB or a 10 meter "Export".
CB/10 meter question.
Discussion in 'CB Radio Forum' started by Off Again, Dec 15, 2012.
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A standard CB has 40 AM channels and a legal transmit limit of 4 watts.. Those CB's that also have the upper and lower sideband modes included still have only 40 AM channels, but the difference is that you can choose to transmit and receive on the upper or lower portion of the AM channel frequency when you are in side band mode. This is a more efficient way to use the transmit power and a sideband signal will go farther for the same amount of transmit power.
The 10 meter Export radios are not really CB radios because they are not legal to use on CB channels, since only those radios that are approved by the FCC as CB radios can be marketed as CB radios. To get around the legalities, the sellers market the radios as export or ham radios, but know that most people who buy them will convert them for use on CB.
Power wise there is no difference - 4 watts is 4 watts, whether it comes from a CB or an export radio. However, the export radios typically have more than legal 4 watts transmit power - they have 10 watts, 25 watts, some up to 100 or 200 watts. Since you are only allowed 4 watts on CB AM mode, ( this effectivley is 12 watts when you are in side band mode), the export radios offer more power than is legal to use.
The other issue is that they often offer extra channels - ie, A, B , C, D, which is another way to get around the legal prohibition of only using the allowed 40 AM channels.rabbiporkchop Thanks this. -
Stay ON the CB band, and you'll have not trouble!
GFrabbiporkchop Thanks this. -
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Thanks for all the info guys. I've been trying to figure out why some of the assigned tractors I've been using have Galaxies and the likes with the SSB/LSB/USB switch and the others have the Connex, Stryker and also Galaxies with the ABCDE switch.
I currently own a Uniden 78XLW that I've had peaked & tweaked with "Hot Finals" matched to a Wilson 2000. It will do 10 watts dead key and swing 46 on a Bird meter. It works and sounds absolutely fantastic and I get compliments on its clarity frequently but, all my new coworkers are telling me that that's fine for now but, you're going to want to switch out eventually because " we all hang out on 50".
When I do get a tractor with no radio in it I will hook mine up but, I see everyone talking in the yard but I can't find them on 1 through 40. I will eventually make a move ( I really like the Stryker 497s I've used with the dial on "D" and channel 19) I'm just trying to do a little research. Thanks again for all the info. -
When you go to the "D" band, that puts you into (i believe) the morse code part of the 10m band. You will stick out like a sore thumb there if you use a voice mode. Channel 40 is 27.405 mhz and the 10m band goes from 28.000 mhz to 29.700 mhz. The gap between 40 and 28.000 is the so-called "extra" or freeband channels. Stay below 28.000 and you wont draw the ire of the hams.
rabbiporkchop and jessejamesdallas Thank this. -
I can understand why some opt for exports...because they offer a little more power, and they usually come with truckers toys aka blue lights, roger beeps and echo boards. Yes they also come with the capabilities to operate out of band, but that's treading on thin ice.
What are you implying when the other truckers say to you "we all hang out on 50"?
Also if you see folks talking on their CB's but you can't pick up what channel they're on, it indicates you're not on the same frequency as they are. Chances are they're all talking on an illegal frequency that is not reserved for CB. That's what you need to watch out for. As Gadfly said, flipping the band switch can and will land you somewhere that may be illegal to talk, and there are folks who monitor these frequencies to see if they find any intruders, and if they do they'll use directional finding equipment to track you down, jot down your tag number/truck number, and turn you in.
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Is there a lot of people talking on side band anymore?
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There's still some that do single sideband....mostly radio enthusiasts.
The Snowman Thanks this.
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