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Share on Facebook A linear amplifier is installed inline between the antenna output of a CB radio and the antenna connected to the unit. The amplifier takes the output of the radio and boosts the signal, resulting in improved transmission distance in most cases. Linear amplifiers may be designed for home or mobile applications, with the primary difference being the power connections each requires.
A linear amplifier can boost the output of a CB radio. Step Place the amplifier near the radio, with 3 to 4 inches of ventilation space around the edges of the amplifier, for a home base. In a mobile application, find a spot that has several inches of ventilation room and is close to the radio. For an amplifier for mobile use, use a screwdriver and the accompanying mounting hardware to securely fasten the amplifier. Step Unplug the antenna connected to your CB radio.
Plug the antenna into the antenna jack located on the amplifier. Step Plug the amplifier’s jumper cable into the CB radio’s antenna jack. Connect the plug or set of terminals on the other end of the jumper cable to the input jack on the amplifier. Step Plug the power cord of a home amplifier into a wall outlet, and switch the power on to operate the amplifier.
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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.
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Every project has to start somewhere. This is the prototype version of the linear amplifier during initial testing. At the right of this picture is my “Tower of Power” , a stack of 6 series connected computer power supplies which produces 30 volts at 35 amperes. As you read this article, you will see that I have taken many of the parts for this project from old computer power supplies. They are today’s equivalent of the old vacuum tube TV sets of days past.
In those days, Amateur operators would gleefully strip old TV sets for the valuable components they contained. Many an Amateur radio operator went on the air with a transmitter built almost entirely from old TV parts. The large black unit in the right of the picture is my home made KW dummy load, consisting of 6 large ohm non-inductive resistors inside a pair of one gallon cans carefully soldered together and filled with transformer oil for cooling.
The Motorola Starpoint modem is on the bench in the center of the picture. The modem is powered by a small computer-style switching power supply taken from some old networking equipment. The RF output from the modem goes to the prototype amplifier, shown here at the left side of the picture.
Wiring for a linear amp..
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Thinking of buying a used FL B? When buying any FL series amplifier some of the things you want to look for in this amplifier are burned parasitic resistors, 22 ohms 2 watt resistors on the plates of the B tubes. Burned 33 ohm 1 watt resistors in the grid circuit under the rear cover in the back of the amplifier.
High Voltage should be up to 2. One word of caution, be very careful when working with the covers off and the power on the amplifier, if you have to do this. Also note there is a safety interlock under the cover of the PA cage cover. I have seen it plenty of times where the 47K ohm R in series with the switch is burned open which indicates someone turned on the amp with the lid off of the top shield off of the tank circuit and the interlock was not defeated.
Typically these amplifiers will give you about watts on the low side and up to watts output with new tubes and wired for VAC input. As a matter of fact I’m convinced now that they work great, just as well as the Cetron tubes ever did. I do not recommend putting Sylvetlana tubes in these amplifiers, if you look closely at the Russian B tubes, the plate area is much smaller when compared to the new Tayolor tube.
It’s my understanding too that the Russian tubes do not hold up nearly as well when operated in a horizontal position. I have used the Sylvetlana tubes in place of tubes in such amplifiers as the Ameritron H amplifier and they worked great in a vertical position in place of the type amplifier tube, not like that of the FL series or the Heathkit SB amplifiers.
This modification came from a Yaesu Technical Bulletin. I did this to one of my amplifiers and the bias is adjusted for 0.
How do you hook up a solar panel into the home? Basically you need to change the dc created from the panel to ac. You will need an inverter for this. This will create a steady current sutable for the home. This can either be direct from the solar panel or the panels can connect to a bank of batteries which can store the energy and the inverter ca…n be connected to the batteries and then to the ac cuurent in the home.
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Mar 04, · Need-Help-with-putting-a-Watt-Meter-in-line, how to connect a watt meter in line between a cb radio and a linear, how to hook watt meter in line from cb radio to linear amplifier, weredoes one put swr meter in line. Bookmarks. Bookmarks. Digg;
Photo by Eirik Solheim. Some people are more than a little inconsiderate, and when a friendly note or call to your landlord doesn’t solve the problem, sometimes you need to take matters into your own hands. Evil genius and electrical guru junkyardmessiah over at Reddit came up with this DIY solution: In deference to XKCD the real way to cause problems with her system is pretty simple.
See if you can get a good guess where she has her [speakers]set up and get your antenna close as you can to it. The amplifier sections are not shielded in these plastic ready made toys and the resulting AM signal will impact it. In my case I ran a continuous 6khz tone from a signal generator which was more than enough to blow it up good. Essentially, with a few tools, you can transmit your voice, play an annoying tone, or even blast your own music through their speakers — even if their speakers are turned off.
If you’re truly evil, you could probably blow out their speakers too, but that could have repercussions.
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I’m on a budget which antenna do I need. Texas star high drive in a Suzuki samurai soft top thanks Mine says “Black Widow” but is exactly the same thing.
inkey2: Back in the early s/late 60s a friend of mine made me an inside the house CB antenna. It was just a very long wire running completely around the .
Meter protection diode D16 is the unlabeled small black diode near C It protects the meters in the event of an arc. If D16 fails from an arc, the grid and plate current meters will track. The grid meter will no longer read grid current and the plate current meter will no longer read plate current. They each will read a combination of plate and grid currents. This diode can be replaced with any 1 to 5 amp silicon power rectifier diode that physically fits.
Design History I designed the AL series amplifiers in the late ‘s or early ‘s.
How To Turn Your CB Car Radio Into A Powerful Transmitter
Some of the test and monitoring equipment for the military was the best that could be produced at the time and no expense was spared in its construction. At the budget-built end, there were the countless test-gadgets intended for radio repairmen or radio hobbyists that might seem to barely be able to perform the intended task but clever designs sometimes resulted in very useful test instruments.
Biddle of Philadelphia imported these instruments and each box has his tag attached. Biddle was also a very early major builder and supplier of wireless equipment with Reginald Fessenden being one of his prominent customers over a long period of time. At the turn of the last century, many precision measurements had to be calculated because the measurement couldn’t be made directly since many of the instruments we take for granted today hadn’t been developed.
A known precision resistance allowed one part of the equation to be selected and the remainder was then calculated.
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.
There are no CB Radios with other transmit capabilities services, however. First, The Taller the antenna, the better it will work. Usually, all else being equal, the Tallest, longest antenna you are comfortable with, mounted as high as possible, will give the best performance. For Example, mounting a new 4 foot CB antenna in the same spot where you were using a 2 foot, will usually give better results. It wouldn’t really matter what “brand name”, color, or style the 2 ft antenna was.
A – This is a common question.
How to Improve TV Signal on a Long Coaxial Cable Run
What do guitarists need for amp rig consulting? Uses the built-in camera mic. The limited guitar-playing ability here shows the benefit of dry-guitar files per the Amptone Reamp Project , useful for amp builders, power-tube circuit designers, and preamp distortion circuit designers. Mike Ralph’s DIY speaker cabinet isolation box — fits a 2×12 cab. Added July 29,
Used (normal wear), illegal linear power amplifier for cb,hf. Make an offer! OfferUp is the simplest way to buy and sell locally. Get the free app. $ illegal linear power amplifier for cb,hf. Modesto, CA. Posted 5 hours ago in Electronics.
Over the years each employee has had to learn the hard way “not to drill or self drill screw into anything that you can’t see behind or feel behind to make sure you don’t drill into anything you shouldn’t”. We have had installers drill into air-conditioning coolant, break fluid, batteries, wires, antifreeze, glass, and one installer even drilled the gas tank on a VW and everything else under the hood or behind the dash. With each new installer this Rule has been broken which usually costs Truckcity a lot of money.
Most of the time the answer I get when I ask if they looked or felt behind where they were drilling they said “I didn’t think there was anything there”. Or ,and this is a good one. S; just make sure every time”. CB Radio location The main rules are usability and staying away from the heater. If you mount the radio where the heater blows on it, it will overheat the radio inside and shorten it’s life. Where ever the radio fits is fine.
Keep it close enough that the mike wire isn’t stretched to much when you’re blabin because stretching breaks the wires. Make sure there is enough room behind the radio to hook up the wires and don’t make it so close the wires are rubbing and bending back and forth from vibration. As you know bending a wire back and forth will break it.
Remember the radio is a little heavy for it’s size so be careful not to mount it to anything that is too week to take the bouncing down the road it’s going to have to withstand.
How to Hook Up a CB Linear Amp
You’ll often hear people say on the radio that their Cobra 29 LTD has had a “swing mod” or “Super mod” done to it. On ebay people often will tell you that the radio they are selling has had a swing modification done to it to make it a “screamer”. So what exactly IS the famous “super modulation” modification?
Do you need a HAM / CB / Scanner-Monitor radio schematics / service information to repair, modify, test or install you vintage CB radio / citizens band transceiver? We carry a good selection of schematics / service manuals for vintage CB radios.
You can even add floats! Landing is easy thanks to AutoLand technology and Panic Recovery Mode greatly reduces the risk of a crash. The combination of Virtual Fence and Holding Pattern also work to keep the aircraft within a comfortable range. Proportional 3-channel control makes maneuverability simple and an efficient power system delivers impressive climb performance. Fully assembled right out of the box, this ultra micro can be ready to fly in the time it takes to charge the battery.
From the distinct outline to the cylinder fins on the dummy radial engine, scale detail can be seen throughout. The result is an impressive flight experience that offers full four-channel control for great handling on the ground and the maneuverability to perform scale aerobatics. Durable and able to fly indoors or out, the integrated HD camera can deliver its FPV down-link to multiple smart devices at the same time.
This aircraft comes out of the box fully equipped with operational flaps and retracts already installed. The way it flies separates this warbird apart from others in its class.