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Hitachi MOSFETs - ePanorama.net | Audio | Video
https://www.epanorama.net/sff/Audio/Semi_Specs/HITACHI_MOSFETS.PDF
6.1 Audio Power Amplifier Uses 6.1.1 Linear Power Amplifier 1. Design of output stage (design of power supply voltage VDD) Figure 6-1 shows an equivalent circuit of the output stage. Ron is a drain-to-source equivalent resistance when the power MOS FET is on, and according to the 2SK1057/2SJ161 specification it is:
Hitachi HMA-6500 Review - VintageSonics
https://vintagesonics.com/reviews/amplifiers/hitachi-hma-6500-review/
Hitachi’s power MOSFET HMA-6500 isn’t the best power amplifier in the world, but it’s still a fascinating time in hi-fi architecture and thus a collector’s item. It is literally true to claim that it, together with its higher-end amplifiers from 1979, transformed hi-fi …
Home-brew Hitachi Mosfet Power Amplifier - Radio Retro
https://storycase.co.uk/radio/power-amp/hitachi-mosfet-power-amplifier/
Home-brew Hitachi Mosfet Power Amplifier. This is a project from 1981, my second to last attempt at design and construction of a low distortion audio power amplifier. It took several months on the bench tweaking constant current sources before etching the PCB and a few weeks cutting out the aluminium panels and wiring it all together.
Project 5 – BuildAudioAmps
http://buildaudioamps.com/project-5-mosfet/
100W MOSFET Audio Power Amplifier. The concept of Project 5 originated from an old Hitachi Semiconductor Power MOSFET Application Notes. The Application Notes explains the characteristics and advantages of using Power MOSFETs in various applications. A typical design of a 100 Watts audio power amplifier was presented as an application for these ...
Power Semiconductor Device Division : Hitachi in the U.S.A.
https://www.hitachi.us/psdd/
Hitachi Semiconductors implement cutting-edge technology to develop power semiconductors to meet the needs of a variety of market segments. Our broad line of power devices include ultrasound specific HVIC and high voltage monolithic IC, IGBT module and bare die, SiC MOSFET module and bare die, alternator and power and high voltage diodes.
What other amps have that hitachi mosfet sound? — Polk ...
https://forum.polkaudio.com/discussion/150628/what-other-amps-have-that-hitachi-mosfet-sound
Before I got my hands on the polk sda's I thought I was in my audio happy place. I was running two bridged hitachi hma 8500 mkII connected to a pair of pioneer hpm 500's with that little ribbon and a couple of polk psw 505 (one for each channel). I love the details and smoothness of …
Project 101 - High Fidelity Lateral MOSFET power amplifier
https://sound-au.com/project101.htm
The lateral MOSFETs used were Hitachi/ Renesas lateral devices, 2SK1058 (N-Channel) and 2SJ162 (P-Channel), however these are now obsolete. Lateral MOSFETs are designed specifically for audio, and are far more linear than the (currently) more common switching devices that many MOSFET amps use.
Hitachi Power Mos-Fet set For Sale - Canuck Audio Mart
https://www.canuckaudiomart.com/details/649810346-hitachi-power-mos-fet-set/
I have for sale a Hitachi Amp, Pre-amp, Tuner combo in great condition. HMA-6500 power amp features 50 Watts per channel using Mos-Fets for bold and very musical presentation. Amp has been serviced by an experienced tech and the speaker connectors have been updated to allow use of banana plugs. HCA-6500 Pre-amp works flawlessly, the FT-440 ...
Best audio power MOSFET | diyAudio
https://www.diyaudio.com/community/threads/best-audio-power-mosfet.165116/
Vertical power MOSFETs (and similar technologies, such as PI and trench types like Toshiba J200/K1530) tend to have a 'sweet spot' where the capacitance, gm and current are sensible enough tp get good performance in audio - usually this happens in MOSFETs with Vdsmax between 100 and 300V - usually on the lower end of this range for P channel …
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