As visitor numbers have increased over the last 6 months so has the amount of emails that we receive. Its all good though and if we didn’t want them we wouldn’t ask you to get in touch at every opportunity.
Once we’ve filtered out all the predictable spam, the real emails can add up to a good number each month and we always shoot off an email in return. That is until you get one of those emails addresses that just refuse to work, as is the case below with an email about CB radio packet.
As we couldn’t get this reply back to the sender the next best thing was to use it as the idea for a blog post. Right now your probably thinking easy content creation!, too right but the email does ask some interesting questions from someone who is just starting out with the idea of data modes.
Its good to see this side of radio technology from a beginners perspective as it makes us consider how we would explain it all.
This is the email that would have been winging its way to our readers inbox if we knew where it was.
Thanks for your email and the comments about How To CB Radio
The article I’m sure your referring to Using Data Modes on CB Radio is a little short on actual details and has been added on my list of things to improve.
There are a few questions in your email so I’ll go though them one by one as best I can.
“How do you set up a PC to a CB, what connectors would you use?”
Most data modes can be sent/received without interface hardware these days provided you have a way to modulate/decode the audio signal they produce. There are plenty of good free computer sound card programs available to download online ( Multipsk, Flgidi etc).
One thing I do recommend is some form of simple isolating interface between computer and radio to prevent the receiver being washed out by the many stray radio signals a computer generates.
Interfacing is as simple as sound in, sound out and a way to remotely control the push to talk button on the mic (simple relay setup). Please have a look at this site for ideas about interfacing and general hardware overviews.
“Can you still connect the mic up for use in tandem to the PC?”
Any wiring into the mic PTT circuit along with the audio in/out can be done easily on the inside of the CB, current is tiny so thin wires can be used to keep things tidy and it won’t effect the normal operation of the CB.
“Do certain CB radio makes have specific ports to use or would a little soldering be required?”
CB’s as a whole aren’t set up for plug and play data mode use but if you were serious about its use there are certain cheap used Ham transceivers that transmit of 27 MHz that will do it. The amount of work required to get packet going is very small and will need a little bit of wiring and soldering experience.
“I’m assuming that the CB band has very little bandwidth so would be interested in teleprinter (RTTY?) and CW emulation as the transmission medium….?”
The huge majority of data modes are sent in sideband mode so CB is more than equipped to deal with them.
“Having read some articles on the web it looks like CB has been given use of AM and SSB, is this an advantage for sending data over CB?”
That’s an interesting question, I suppose if you go on the assumption that the available bandwidth of any mode is enough to carry a signal using SSB does give an increased factor in transmitter range because of its compression qualities.
Hope the information above answers your questions and if there’s any thing else I can do please ask.
All the best
We hope the person who sent it gets to read this reply even if its not coming via the expected channels 🙂 If you have anything to add please use the comment box below our send us your very own email.