The aim was to build a MC sensitive preamp that was quiet, used only tubes and had a certain something that made you want to listen. This thing is quiet and if built properly, hum free. I have to put my head very near the speaker to hear a slight trace of hum or hiss at loud listening levels. The main design aim other than to make it sound good wa
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s to give the circuit a solid reference. Single ended circuits "pass on" virtually every bit of power supply noise. This noise may not be audible in its own right but it will modulate the signal passing through the gain stage. Part of providing a solid reference is getting and maintaining an unambiguous and relatively low impedance audio ground. The audio ground is a single foil conductor about 20mm long. All the audio components are connected to it using their leads only - no extra wiring is used. The circuit is shown almost exactly as it is wired. Another design aim was to trust the components to do their job. "A sound" was not the aim but it was designed to allow as much as possible to be heard detail wise but also to maximise the connection to the musician(s) and allow the musical message through. This is very hard to explain and I was surprised how delicate this balance was. The simpler it got, the better it became up to a point. The more iron/coils I threw at it, the better in these terms it became especially rhythmically. Any additions to "help" the circuit such as active/CCS loads and regulators etc got in the way. As the PSU got better, the less these things were needed. If the PSU is average, then these circuit "tricks" can be used to advantage as they isolate the audio circuit from bad power supply artifacts. After using dual mono supplies for years, it occured to me that it is impossible to provide a common...
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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