Although the Audionics CC-2 is named after Cliff Moulton (Audionics` chief engineer) and Charles Wood (Prez of Audionics), as usual in the business world, the principals in the company masked the identity of the real creator - Bob Sickler, whose name appears as `RLS` on the schematics. Since Bob passed away several years ago in Portland, the leas
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t I can do is give him the recognition he did not get at the time he designed the amplifier. This is the product that kept Audionics afloat in the late Seventies, selling more than 2000 copies in the US and overseas. There are still lots of people using them today, and I still get the occasional inquiry about repairing one. Well folks, you are on your own, unless you find an engineer or technician sharp enough to replace the obsolete Motorola transistors with similar types and is smart enough to re-compensate the feedback loop for the faster transistors. Back to the story of the CC-2. In the mid-Seventies, Audionics wasn`t doing too well. The amplifier designed by Cliff Moulton was extremely unreliable, with a field failure exceeding 50%. Some days we got back more blown-up amplifiers than we shipped out new. As anyone who`s worked in electronics repair knows, it takes a lot longer to fix something than build it in the first place - most of the cost of electronics is the labor to assemble it. So Cliff`s amp - the PZ-3 - was costing us a lot of money, and threatening the continuation of our jobs. After six months CM finally figured out his amplifier didn`t have enough phase margin, and the driver transistors were underspecified for Safe Operating Area (SOA) current. So if the speaker load was just a little squirrelly (and lots of dealers used speaker-switchers then), the amp would enter brief modes of oscillation, which...
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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