Category Archives: General
Choosing Fixed Resistor Types
Choosing Fixed Resistor Types
Fixed resistor types. There are many different Types of fixed Resistors available, from very small surface mount chip resistors up to large wire wound power resistors
Carbon composition
This type of resistor was once the most common type available, but now is seldom used as they have been overtaken by metal oxide or carbon film resistors. This resistor is considered too large nowadays for most applications and also has a large negative temperature coefficient. The resistance values would often change because of heating or aging effects.
TPA12A LM12CL TDA7265 TDA7293 TDA7294 High Efficiency Class D Designs for Small Hi-Fi and Stereo TV
TPA12A LM12CL TDA7265 TDA7293 TDA7294 High Efficiency Class D Designs for Small Hi-Fi and Stereo TV
The range of supplies that can be accommodated and outputs available now is large (the stereo TDA7265 (25+25W/8R) is useful for small hi-fis, stereo TVs, etc) and high efficiency class D designs can prolong battery life. The 50W+ TDA7293/4 series, which have DMOS output devices, offer a robust solution (the ’3′ can be paralleled for high currents into low impedances) and are seen in a number of ‘audiophile’ amplifiers and kits, like the Velleman K8040 and the Quasar 1218. In excess of 100W can be obtained from a single TO3 can with the TPA12A and LM12CL.
NAD 3020 VS NuForce
NAD 3020 VS NuForce
No doubt about it, Nuforce makes audiophile products that don’t conform to the old paradigms. Take a look at the Dia digital integrated amplifier. It’s downright tiny, accepts only digital sources like CD, DVD, or Blu-ray players, or an Apple TV, flat-screen TV, game, or cable box. How tiny is the Dia? Just 6 inches by 4.5 inches by 1 inch; and man that’s really small. It has one RCA coaxial and two Toslink optical digital inputs. The onboard digital-to analog converter accepts up to 192kHz/24-bit sources, and the analog switching stereo 24 watt per channel amplifier runs cool to the touch. I assumed the front panel’s 3.5 mm jack was for headphones, but no, it’s a subwoofer/line-level output. The $299 Dia weighs 1 pound. Nice!
Build Cheap 12V to 220V Inverter
12V to 220V Inverter Schematic
Even though today’s electrical appliances are increasingly often self-powered, especially the portable ones you carry around when camping or holidaying in summer, you do still sometimes need a source of 230 V AC – and while we’re about it, why not at a frequency close to that of the mains? As long as the power required from such a source remains relatively low – here we’ve chosen 30 VA – it’s very easy to build an inverter with simple, cheap components that many electronics hobbyists may even already have.
Mercury 45 Amplifier Uses TDA7265 Chip from ST Microelectronics
Mercury 45 Amplifier Uses TDA7265 Chip from ST Microelectronics
Judging by the woofer, the predecessor Mercury 45 is a model Mercury 30A . Visual improvement in model are appearing dome tweeters, more modern design, and adding the karaoke function. Increase in body size at the same rate dynamics, in our opinion, is not so obvious. However, the situation seems to clarify the positioning of the Defender of its columns as the best solutions to build a home theater system.
Valve Versus Transistor Amplifier
Valve Versus Transistor Amplifier
Not all of the considerations of valves versus transistors relate solely to performance. It is worth bearing in mind that products involving obsolete technology will be disproportionately expensive, difficult to obtain and possibly of inferior quality.
Valves can also vary in operating characteristics from sample to sample – especially where two valves of the same type are obtained from different sources. Characteristics that can vary are mutual conductance, operating grid bias, anode current impedance, and even usable anode voltage.
NAD 3020 Amplifier Vintage HiFi that Great Sounds Quality
NAD 3020 Amplifier Vintage HiFi that Great Sounds Quality
The small amp was a great success in 1980 and immediately NAD on the map. While the amplifier has a reputation as a giant-killer, he is not very big – only 16 3.75 10 inches. And the view is based robbed. The sound is something else as soon as I moved, I remembered why budget-conscious music lovers have more than a million and a half 3020S in about three years, making it the best integrated amplifier-seller of all time.
Making Your Own PCBs
Making Your Own PCBs
Did you miss with projects of electronics? Is that each project must have a tangle son sitting on a breadboard or solder mass blobbed on the back of some cards bands? Do you pick your projects a more professional? If this is the case, you need to be your own PCB – PCB homebrew short!
Do-It-Yourself Installation Professional Installer Home Theater Systems
Do-It-Yourself Installation Professional Installer Home Theater Systems
You have so many choices when it comes to buying a surround sound system for your home theater. First there are the different manufacturers: Sony, Onkyo, Denon, Bose, Yamaha, JVC, Pioneer are some of the mainstream ones, plus many others. And the sky’s the limit on price if you decide to go high-end, although this site doesn’t cover high-end gear.
Mundorf MCAP MKP Capacitor 2.2uF 250V
Mundorf MCAP MKP capacitor 2.2uF 250V
Mundorf MKP capacitor (MCAP) 250V
The MCAP is an audiophile metallized polypropylene capacitor. In the selection of materials used, special attention was given to the sound properties. Great care taken during the production guarantees constant high quality and minimum electrical and mechanical tolerances.
