![]() ![]() We have not come across any unpleasant surprises throughout our evaluation, since the tool did not hang, crash or pop up error messages. Image Tuner has minimal impact on PC performance, since it uses low CPU and RAM. In addition, an ongoing project can be saved to file and resumed at a later, more convenient time. Images can be previewed in a small, built-in frame, as well as enlarged by bringing up a secondary window. Other effects provided by Image Tuner are able to reset EXIF and general information, flip and rotate the pictures, automatically sharpen them, as well as to adjust the hue, saturation, brightness and contrast levels. The batch renaming tool is simple enough, as you can specify a naming pattern. linear, BSpline, Lanczos3), apply an image watermark and set its opacity and position, as well as convert the pictures to other formats (JPEG, PNG, BMP, GIF or TIFF) and configure JPEG and PNG settings, if necessary. Make image adjustments in batch modeĪs far as tweaks are concerned, you can resize the photos by percentage or size (preset or custom) and use filters (e.g. Image files can be added to the task list using either the file browser, folder view or drag-and-drop method.Īs you may probably noticed by now, batch processing is supported, which means you can work with multiple files at once to reduce overall task duration. Its interface is simple to navigate, thanks to the familiar look. The program is installed very quickly and without any issues. It comprises a few handy tweaks, such as resizing, watermarks, conversion and renaming. For mobile stuff like car radios there is a vibration advantage to using permeability tuning but crystal sets are almost always stationary.Image Tuner is an easy-to-use image editor that supports most popular file types like TIF, GIF, JPG and PNG, as well as unprocessed RAW images. I have seen this as a child in 1969 where a tuning knob was attached to a slug tuned coil and it worked fine. You can do a fixed cap and a variable coil. This LC tuned circuit can have a variable cap and a fixed inductor which is what you normally see. Remember that it was common in the 1930s for radio shops to make and sell crystal sets whilst just selling the more complex superhets. ![]() Hence a loosely coupled antenna with a known high Q tuned circuit will give more predictable results. The hobbyist is not likely to do 360 buried ground radials. The ground resistance will generally be much higher than the radiation resistance because of non ideal ground conductivity. So precise Capacitance is install dependent. The standard crystal set has an antenna that is electrically short so it is capacitive depending on antenna length and wire thickness, wire insulation, ground proximity etc. This smaller idea does not explain the whole problem but it does serve to orient your mind so that, after you have slept on it, you might have a better frame to start to grasp the rest of the problem. If you aren't sure that this makes sense, then here is a smaller idea to get you started: at the end of the antenna, the sum of the primary and reflected currents (but not voltages) must be zero because no current flows out the end of the antenna. If the imaginary part of the ratio happens to be positive-and this depends on the wavelength compared to the antenna's length-then the antenna is inductive. Upon reflection, the current (but not the voltage) reverses.īy the time the reflected wave reaches the transmitter again-importantly, this does not happen instantaneously-the reflected wave (with current reversed) superimposes itself upon the signal the transmitter is generating at that moment.Īre you handy with your phasors? The impedance is the ratio of the sum of the voltages to the sum of the currents, phasor style. The electric current propagates down the antenna and, approximately, reflects from the antenna's end back toward the transmitter. ![]()
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