• To anyone looking to acquire commercial radio programming software:

    Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. All requests will be deleted and a forum infraction issued. Making a request such as this is attempting to engage in software piracy and this forum cannot be involved or associated with this activity. The same goes for any private transaction via Private Message. Even if you attempt to engage in this activity in PM's we will still enforce the forum rules. Your PM's are not private and the administration has the right to read them if there's a hint to criminal activity.

    If you are having trouble legally obtaining software please state so. We do not want any hurt feelings when your vague post is mistaken for a free request. It is YOUR responsibility to properly word your request.

    To obtain Motorola software see the Sticky in the Motorola forum.

    The various other vendors often permit their dealers to sell the software online (i.e., Kenwood). Please use Google or some other search engine to find a dealer that sells the software. Typically each series or individual radio requires its own software package. Often the Kenwood software is less than $100 so don't be a cheapskate; just purchase it.

    For M/A Com/Harris/GE, etc: there are two software packages that program all current and past radios. One package is for conventional programming and the other for trunked programming. The trunked package is in upwards of $2,500. The conventional package is more reasonable though is still several hundred dollars. The benefit is you do not need multiple versions for each radio (unlike Motorola).

    This is a large and very visible forum. We cannot jeopardize the ability to provide the RadioReference services by allowing this activity to occur. Please respect this.

CB SWR'S

Status
Not open for further replies.

n9mxq

Member
Premium Subscriber
Joined
Dec 15, 2005
Messages
1,770
Location
Belvidere IL
You can do it yourself. Get an external SWR meter when you get your radio. Don't trust the radios built in SWR meter. Search the web, there's plenty of how-to's out there
 

PACNWDude

Member
Joined
Oct 15, 2012
Messages
848
I actually have one small enough that I leave it connected in line with the radio and antenna. It is some cheap MFJ unit that I bought at Fry's Electronics on clearance at some point. Lets me know when I have hit too many trees with my CB antenna and need to re-tune it. (The trees knock the adjustable section around at times.)
 

RC286

Member
Joined
Oct 25, 2013
Messages
139
Location
Winnipeg MB
You can use a stand alone meter or the one built into your radio if it has one. Many radios also have an SWR warning light that will warn you if your SWR reaches critical level that may damage the finals in the radio. Dont rely on this, but if you ever see it light up, check your SWR, coax, antenna, grounds, connections etc.

The objective behind tuning your antenna is to make these two readings as close as possible. Getting down to a 1.5:1 ratio or below makes for a passable broadcast signal. There are two basic points to understand before adjusting the length of your antenna:

If the SWR on channel 40 is higher than that on channel 1, your antenna is too long.

If the SWR on channel 1 is higher than that on channel 40, your antenna is too short.
from this site CB Antenna Tuning Instructions | Right Channel Radios


That is the basics of the tuning process, if you are new at this, getting something with a set screw for adjustment or a threaded tip like a firestik would be a good idea as opposed to one that you physically have to cut, cut off a bit too much and your hooped.

Make sure the antenna is properly grounded and ignore any of the things you read on the internet about 18ft coax being a magic length. Use the shortest length necessary to get from the radio to the antenna, a good RG8X would be a good choice, avoid RG58 if you can. If everything is terminated properly and the antenna is grounded properly, your coax length will have no effect on the SWR. If length affects SWR, something is not right in the installation. Seal up your exterior connection (unless you buy an antenna with a hermetically sealed junction in the base) to keep out moisture and prevent corrosion. Some like Silicon or RTV, I have used both, but I prefer the 3M rubber splicing tape. Easy to use and unlike silicon, it can be removed by gently slicing it with a box cutter and peeling it away in case you ever have to repair the connection.

As for power to the radio, if this is mobile, many people suggest running directly to the battery. This is ideal, however, 90% of the installs I have done, I have use the fuse taps, AKA "add a circuit" to piggy back off of a circuit such as the cars radio to allow the CB to shut off with the ignition. I have had great results doing this, but, keep in mind every vehicle is different.

Good luck

73s

cheers
 

SCPD

QRT
Joined
Feb 24, 2001
Messages
0
Location
Virginia
A c b with self adjusting s w r 's are they also adjustable with a s w r meter to be compatible with antenna ?
 

RC286

Member
Joined
Oct 25, 2013
Messages
139
Location
Winnipeg MB
There is no such thing as self adjusting SWR. What you might be thinking about is a auto SWR meter that doesn't require calibration. (such as on my DX-959)

SWR (standing wave ratio) is literally a ratio that refers to the amount of RF energy reflected back up the transmission line (coax in this case) from the antenna to the radio relative to the power the radio is putting out. This is all due to a mismatch in the antenna.

In an ideal world you would have a radio with exactly 50 ohm impedance, an antenna with a 50 ohm impedance at the feed point and a feed line with no reactance. This would give you a perfect match or a 1:1 SWR. in the real world, getting a 1.2:1 is considered a great match. Getting a 1.1:1 like I happened to luck out with on my mobile with the 102" whip is well, exactly that, luck.
 

SCPD

QRT
Joined
Feb 24, 2001
Messages
0
Location
Virginia
Thanks for the reply, So there is more to this than what meets the eye, May be I should just for get about this CB thing. Thanks again for the reply, have a good day!
 

RC286

Member
Joined
Oct 25, 2013
Messages
139
Location
Winnipeg MB
Thanks for the reply, So there is more to this than what meets the eye, May be I should just for get about this CB thing. Thanks again for the reply, have a good day!
Its really not as complicated as you might think. Buy yourself a radio, an antenna (the firestik antennas are very easy to tune for beginners) a length of coax and whatever kind of mount to suit your needs. Install the mount antenna and coax, hook up the radio, make sure the antenna mount is grounded well and tune the antenna. thats all there is to it.

the tuning process is simple, just repetitive and tedious.
 
Status
Not open for further replies.
Top