QRZ Forums. Tune before or after the amp? I have an MFJ Deluxe Versa tuner and a 40 meter dipole that tunes perfectly, showing watts out and match. As mentioned the tune is perfect before the amp and after the amp, the SWR is more like I have read that the antenna should be tuned after the amp and not before.
Can anyone offer an expert opinion? Last thing I want to do is kill this extremely well built amp Here is the order: transceiver output to amp input; amp output to tuner input; tuner output to antenna.
In your case you can either use the meter in the tuner or put the other meter between the tuner output and antenna. The amp should always be off or in standby while you tune the antenna for minimum SWR. Only when you have the lowest SWR you can get should the amp be producing watts. Here is another thing to consider. You said "Delux Versa Tuner but you didn't give a model number. Make darn sure that if you run that amp at watts output the tuner can handle it.
N7WRNov 13, The tuner should go between amp and antenna. AG4RTNov 13, Often, adjusting the antenna tuner using just the driver transmitter gives one setting. Then, switching an amplifier in the line gives a different tuner setting. My procedure is to drive the amp at low power; say 50W. Tune the amp, then antenna tuner at that low power.
Then, crank up the drive and your antenna system will still be in tune. K6BSUNov 13, I've killed tuners by putting too much power through them. K6CLSNov 13, Thanks to all. The Versa Tuner is watt, so I have a problem.QRZ Forums. Hook up sequence? What should be the sequence of connecting 1 Rig-Amp-Watt meter-Tuner-antenna? Both appear to me to make sense. Thanks for any help!
KJ4QNL likes this. N7WRFeb 24, If you don't have a swr meter you will have to use 1 to tune the tuner. I'm not sure about the FT If the transceiver has a SWR meter either would work.
It is best to first tune the tuner and to then tune the AMP. K9XRFeb 24, If you put the "meter" between the tuner and antenna, it won't show when the antenna is matched, and will only show the native SWR of the antenna before tuning, which isn't important information.
First, you buy her a drink. Oh, wrong kind of hookup. You are tuning the antenna system to present the best match i. If you put the meter after the tuner, you could adjust the tuner all day and never see any difference in the swr. So: Rig The input circuits of the amp should present a good match for the rig, if not, they are adjustable via slugs accessible from the rear.
I never had to touch mine though. KQ9JFeb 24, If you already have all that equipment my advice would be to get a dummy load before hooking everything to the antenna. Then you will know the answer to your questions. AC0FPFeb 24, If your tuner is not rated for the power your amp can produce it will probably be damaged. If your antenna mismatch is great enough your amp may suffer. Cut your antennas so they are closer to resonance and forget the tuner.
If you don't have room for an antenna on each band and have to use the tuner I would have it between the rig and amp unless the tuner is rated for legal limit. Show Ignored Content. Share This Page. Your name or email address: Password: Forgot your password?
Register for a free QRZ account.This requires a more robust antenna and electrical system than what might be used for the more common low powered or CB radio systems. The electrical system must be capable of delivering a constant 40 amps minimum of DC current at These radios must be wired with both red positive and blue negative wires direct to the battery with 8ga for up to 10 feet and 6ga.
Attaching the negative lead to vehicle chassis ground will not work. When connecting a high power 10 meter radio to a DC power supply the power supply must be rated at a minimum of 40 amps constant at Some radio antennas that may have worked with lower powered models do not always mean they will work with high powered radios. High powered radios tend to stress and expose any weak spots in the antenna system such as inadequate antenna grounds, cheap coax and poorly soldered coax connections.
Magnet mount type antennas are never a good choice for high powered radios. Newer model Class 8 trucks with fiberglass cabs will not normally have good grounds supplied to the mirror mounts and may need to be retrofitted. These antenna systems will not work with high powered radios. With a case such as this you must install a separate high quality length of coax from the high powered radio directly to the antenna or a special co-phased coax harness if running dual antennas.
This means extra special attention must be paid to making sure your antenna system is properly matched to your vehicle. Antennas should always be tested by technicians trained in antenna impedance and VSWR. The SWR meter, which comes built-in with some of the more expensive models, is not a precision piece of test equipment and should not be trusted as completely accurate. Grounding cannot be over stressed. With RF communications it is the 1 culprit of the radio world.
Poor grounds cause problems to antenna systems and radio operation. Approximately nine times out of ten, if you have a problem with your radio setup the cause will be poor grounding. As a general rule of thumb: try to keep all grounds as clean as possible and all ground straps as short as possible.
Always try to add a short ground strap from one of the radio cover screws to your vehicle chassis ground. Additional information from GI Joe's. Hooking up Cb radios, 10 meter radios or amplifiers over 50w:. In a 18 wheeler the red and black dash terminals will usually run up to w MAX 18amps although It is not recommended.If Yes!
I am Joe, an expert Trucker and hobby blogger. The only option I had that was to find the best CB amplifier. With it, I could increase the transmission range and always hear and be heard clearly. During my search, I came across several decent CB amplifiers.
But three caught my eye. Check Price on Amazon. It comes in a rugged design which includes heat sinks and a fan to prevent overheating. Although the manufacturer states that you can get as much as W output from this amplifier, I managed to get an average of W to W which is quite decent.
This amplifier also comes with built-in reverse polarity protection which helps to extend its life. The BJ from Baojie comes in an attractive, rugged aluminum frame.
The design includes a front panel with 3 buttons and a power light. From this input, this amplifier is designed to output as much as W. However, you should expect something around W on most days. With built-in reverse polarity protection, you can expect this amplifier to remain operational for some years. It comes in an aluminum frame than includes heat sinks and a mounted high-speed fan.
It requires an input of 5W or 10W for the best output that can go up to W. With regard to the voltage, it performs best when connected to an 18V power source. Like with the other 2 amplifiers previously reviewed, the NEN also comes with built-in reverse polarity protection. The MegaWatt linear Amp power supply is small and light, adjusting the voltages very easy with any meter. It made to be run in parallel with other S power supplies to obtain any amperage you need, 50, amps or more that you want.
You have to just connect them together and run it.
Hook up sequence?
There is a cooling fan inside to control heat and ensure long life. Comes with a grounded power cord. In the situation of overvoltage, it will shut down for protection. Your amplifier should have an input rating within this range. Most CB radios will promise outputs over W. It will be so much loudspeaker. Remember that output might be negatively affected if the amplifier heats up after extended use.
If you want to increase your CB radios power output, investing in a quality amplifier is often easier compared to changing the circuitry of the radio or getting a longer antenna. There are many CB amplifiers on the market today.AM/SSB 10 Meter CB Radio Linear Amplifier - Fire In The Wire. Pay Attention!!
Choose one that best meets your needs. I still use anold TX Star 3 pill W and it works fine. On a good day on the bench putting a 1W dead key and 35 W carrier I can get W. On AM I keep it on low, max 50W.Learning how to hook up a CB linear amp kicker box is easy. You do want to be careful not to hook up one that is too powerful, or you could have problems with the FCC.
Hooking up a linear amp can boost that wattage to 10 or even 12 watts. The linear amps help the output of the transmission. Some CB radios are just weak as far as the signal is concerned. If you live or drive in secluded areas, you may need an amp to boost your transmission signal so that people farther away can hear you.
If there are homes near you when you are using a linear amp, you could bleed over onto telephones, TV and radios. Hook up the CB to a car or as a home base. Hook up the CB antenna, and make sure that the standing wave is correct. Do not hook up a linear amp if your SWR standing wave ratio is bad.
This can only damage your radio. Place the linear amp in a position close to the unit. In a car, you can place the amp on the floor or mount it to the bottom of the CB radio using the side mount brackets. In a home, you can set it up on a table next to the unit.
Unhook the CB antenna coaxial cable from the CF, and plug it into the input on the amp. Then hook up the jumper coaxial cable that comes with the amp to the output on the amp.
Run the other end of the jump lead to the back of the CB, and plug into the input for the antenna. Hook up the standing wave ratio meter to the linear amp as per the directions on the meter. Run a SWR check again to make sure that it did not change. In most cases, it will stay the same, but if it changes, you will have to correct the problem.
Pamela Gardapee is a writer with more than seven years experience writing Web content. Being functional in finances, home projects and computers has allowed Gardapee to give her readers valuable information. She studied accounting, computers and writing before offering her tax, computer and writing services to others.If you have a CB radio, you probably know that it works on low frequencies.
Therefore, in a large city, your CB radio becomes almost useless. You have two options: to go out of town or to the sea you will hear it very well there or use a CB amp. The prospect of going to the sea to use your radio is not a very good idea. Using a CB amplifier is a good alternative. A CB linear amp is a very useful device that effectively amplifies the signal from the radio. How effective is it? A CB radio usually has between 10and 12 watts of power.
If you use a CB amplifier, there is no need to go to another location, because you can get a connection even up to 7k or 8k miles away. A CB amplifier is an excellent device. If you are caught illegally using a CB amplifier, you will have to pay a fine. Fortunately, it is not illegal everywhere, so I will continue with this guide. Are you thinking of purchasing a CB amplifier for your radio?
There is still something that you need to check. The issue is that different CB radios have different power thresholds. Therefore, what does it mean? First, you must sure that your CB radio is working properly and can be connected to an amplifier.
You will find the following three available types of CB radio amplifiers:. CB Linear amplifier is a good choice because it perfectly recovers the outgoing radio signal. Common-emitter amplifiers are good at amplifying the weak incoming signal that the radio picks up. However, most people who need an amplifier for CB radio, only look for a CB linear amplifier.
A linear amplifier is better than the others for two reasons: a it has excellent characteristics and b it allows you to cover hundreds of miles at the highest power.
If everything is ready with the CB radio and it is suitable for an amplifier, it is necessary to take the following steps:. The first step is to connect the CB radio to the base that you keep at home, in the car or in another location. This is because it is possible to break the radio.Forums New posts Search forums. Media New media Search media. Classifieds New listings. Log in. Search titles only. Search Advanced search…. New posts. Search forums. 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.
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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. 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. One package is for conventional programming and the other for trunked programming.
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.