A friend and frequent event-production collaborator has been accumulating legacy Telex wireless intercom gear from various sources, and while the equipment arrives in a nominally working state it sometimes has a few little problems and tends to take a certain amount of wear and tear on gigs anyway. With enough annoying problems having built up ove
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r time across his pile of gear, he asked me to take a look at a bunch of it to see what could be fixed/improved/whatever. Some of it was pretty minor - broken XLR connector latches but he had spare parts for that; miscellaneous loose stuff; and a lot of dirty/corroded battery-pack contacts which 90+% of the time are behind flakey performance. [You`ll see my spraycan of de-ox-it in several of the pictures. ] The intercom-connectivity is easy to get wrong with mis-setting of a nine position DIP switch and a level selector, needed to adapt to any of *four* common wired-side standards. But some of the issues were more subtle, such as distorted audio or units that used to work together and since failed; these would require a little more investigation. One easy thing to miss when systems are set up is the fact that there can be either dynamic or electret microphone elements in the headsets, and the little slide switch in beltpacks or base stations needs to be set to match which type is plugged in. The headsets show absolutely NO external indication as to which is installed. Mismatches generally result in very low transmitted audio. The operation manual for the Radiocom TR-200 belt-pack transceiver specifically states "all headsets used with this intercom are dynamic microphones", which is clearly wrong since the small collection provided to me for testing turned out to be a mix of both types. Fortunately, it`s easy to test for...
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....
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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....
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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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