A transverter on a range of 70 MHz. With access to the transceiver KENWOOD TR-751A (144 - 146 MHz), which was already prepared to work with the transverter DB6NT 5. 6 and 10 GHz, ie, output power is reduced to 1 watt, and transfer to the central core of coaxial transmission appears + 12 volts, I decided it was under him and make up to 70 MHz transverter. Block diagram of the
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transverter shown in the figure located in the following, where I tried to define in detail what the active element is used for what. Also shown in this figure reached my level of useful signal. The scheme of the transmitter power amplifier "PA". Initially, I wanted to do a power amplifier using module MITSUBISHI RA30H0608M, but having in the presence of a large number of high-power microwave transistors Soviet-made, I got an interesting design, assemble and adjust the amplifier is shown in the diagram on the elements. Tinkered with every denomination scheme. Construction. The basis for the boxes, as well as cooler, finned heat sink is HS115-150, bought by me here. It was convenient because it already has holes for mounting the front and back panels. All parts, except for the indicator, power button, LEDs, relays, and an antenna connector, assembled on three printed circuit boards. Fees blocks "LO" and "Main" mounted above the radiator on the rack height of 5 mm. Details and winding products. Most denominations used parts, specified in the above schemes. One of the problems in the design of this design was the use of those components, which "are at hand". Purchased items were assumed to be only on the condition that they are either facilitate or simplify a very, or decorate, etc. construction. L23 and L24 coils are taken from the receiving channel radio DRAGON SY-252N, but they can make and myself, 2 + 2 turns on the frame...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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