On a difficulty scale of 1 to 5, 5 being the most difficult, this is rated at 2. The tools required are a soldering iron with a small tip, rosin core solder, small side cutters, small Phillips screwdriver, and can be built in an hour or two. The result is a 1:1 SWR, and your transceiver is happy to dump its power into the circuit. By using different amounts of inductance and capacitance, the antenna tuner can convert the antenna system impedance to 50 ohms for the radio. Rated for 5 watts continuous, 10 watts PEP, 1.8oz. That’s where the antenna tuner comes to the rescue. The built-in absorption bridge design will ensure you do not damage your finals with a poor SWR. In this video I go through the steps to build a very simple, inexpensive multi band dipole antenna for the 40 and 20 meter amateur radio bands which can be used either at your home or in the field for off-grid emergency communications. That's bad news since 6 nF is 85 times the maximum capacity of the BB 640. and plugging in our L 200 H and f 150 kHz, we get a maximum needed C of including some margin 6 nF. If you can't see the video, please go here: Thanks for joining us today. Depending on what's inside your 'junk box', this project can be done in a few hours. wing nuts, tune for the minimum SWR with the integral N7VE LED indicator and you are ready to go. f 1 2 LC C 1 (2)2f2L f 1 2 L C C 1 ( 2 ) 2 f 2 L. Ap2 METER ANTENNA TUNER, ONE EVENING 2 METER TUNER PROJECT, Thanks to Robert Sumpton for this simple 2-meter antenna 'tuner'. Throw a recommended piece of wire up to a tree, connect it to the tuner with the easy S.S. Our QRPGuys EFHW Antenna with Tuner is the perfect companion for your 40m-15m or 80m outdoor expeditions, restricted apartment location, or just for fun in the backyard on a pleasant afternoon. On the shortwave band this active antenna is. In a recent 2014 survey, the end-fed half wave antenna (EFHW) is the world’s most popular antenna for those carrying everything they need for remote operations. Popular Electronics magazine, July 1989 This simple little circuit can be used for AM, FM, and Shortwave(SW). Stock availability and shipping volume can delay shipping. and it was fun to make it.Your PayPal receipt is your confirmation that we have received your order.

This DIY tuner is good for field work and the WSPR beacon, furthermore it is always good to have a second tuner in the shack. The G5RVj in my garden can be tuned on 80m 40m and 20m, for the 20m band I have to switch on the addon-capacitors. The end-fed antenna was simply brought in directly to the receiver terminals via a healthy piece of copper tubing through a hole drilled in a plate-glass window. The L, C1 and C2 must be isolated from the case, except for the base of the inductor which is connected to the case in the lower left. This is what you see on the inside, note the new location of the balun in case you want to tune an open line directly, the white switches and 4 Russian high voltage capacitors. In this schematic Q is the replacement for the output antenna, and L can vary up to 24 microhenry. For the rest the design is still as shown below where by C1 and C2 can now vary between roughly 40 pf and 400pf. I used the same capacitors and added 168 pf addons that apply to C1 and C2, so this adds two switches to the rear side. The main category is Antenna Tuners that is about Homebrewing antenna tuners. Yesterday and today I spend time on replacing the coil with one that I got from Frans PA0FMC. About Z-Match Tuner Explained The resource is currently listed in in a single category. BUILD AN HF ANTENNA TUNER MAKE A HOMEBREW HF-VHF ANTENNA TUNER (It really isnt all that difficult. The DIY antenna tuner that I described earlier in this blog showed a few shortcomings, it lacked a counter for the roller coil and the variable capacitor range was often too limited. VK5AJL - Make your own HF-VHF antenna tuner.

Homemade antenna tuner