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JFETs: The New Frontier, Part 1 - audioXpress
https://audioxpress.com/article/JFETs-The-New-Frontier-Part-1
JFETs provide extremely high resolution, bringing out more details, sounding cleaner, clearer, and more natural than the best bipolar transistors such as the LM394, and even the best Telefunken tubes. Overall, I believe the JFETs offer the best sound in audio circuits.
Simple JFET Audio Preamps - Ciphers By Ritter
http://www.ciphersbyritter.com/RADELECT/PREJFET/JFETPRE.HTM
The N-JFET Audio Preamp Schematic. The input transistor Q2 is an N-channel JFET. Each particular JFET sets a particular output bias voltage, so the JFET must be selected from among multiple devices for the desired bias value. Fortunately, due to the low current involved, desirable devices can come from a wide range of device types.
An All-JFET Amplifier: Exploring Modern JFETs Circuits ...
https://audioxpress.com/article/an-all-jfet-amplifier-exploring-modern-jfets-circuits
Toshiba Semiconductors manufactured many junction field-effect transistors (JFETs) for audio applications: the 2SJ74/2SK170, the 2SJ103/2SK246, and the 2SJ104/2SK364 to name a few. Once production of these through-hole JFETs stopped, they became expensive. These original devices are difficult to source.
Audio Amplifiers - JFET - InterFET
https://www.interfet.com/audio-amplifiers/
JFETs and MOSFETs - sound-au.com
https://www.sound-au.com/articles/fet-applications.htm
However, MOSFETs can make very good audio switches if configured properly. Unfortunately, the range of available JFETs has shrunk alarmingly in the last few years. Most of the devices that were used for very low noise circuitry are no longer available, and those you can still get from major suppliers are far less useful than the 2SK170 and its ilk.
Linear JFET Amplification/Audio Excellence | All About ...
https://forum.allaboutcircuits.com/threads/linear-jfet-amplification-audio-excellence.183334/
It's an ON-Semi 2SK3557, which is a particularly good audio FET. The top-right graph is the one that matches the one in your book. The ratio between drain current and gate voltage is called Gfs, the forward transconductance.
Best sounding transistors - High-End Audio Discussion Forum
https://forum.audiogon.com/discussions/best-sounding-transistors
Generally speaking, a FET type transistor (like JFET or MOSFET) will typically have more of a warm/rich character. FET transistor are usually not precise and require a resistor or pot to balance for DC offset (when used in an input stage). A bipolar transistor will, typically, sound more clean and will generally have lower distortion.
Best transistor to use for audio amplifier - Electrical ...
https://electronics.stackexchange.com/questions/97827/best-transistor-to-use-for-audio-amplifier
Anyway, I would like to have an idea this early so I can plan on what transistor to use for best audio amplification. I have read some threads how the other transistor (BJT/FET) is better, but other forums say that the performance relies not on the component but on how the transistor is properly biased and how the circuit is properly designed.
OK audio gurus: What are the highly regarded FET-input …
https://www.eevblog.com/forum/projects/ok-audio-gurus-what-are-the-highly-regarded-fet-input-op-amps-these-days/
The OPA627 is mainly good for very low input bias - usually no need for this with audio. Noise and distortion wise OPA1641 or OPA827 perform better. It depends very much on the circuit if a faster OP can be used. If there are more complicated parts (especially active parts) in the FB path, a faster OP can be a problem.
2SK79 VFET gain stage | Super Best Audio Friends
https://www.superbestaudiofriends.org/index.php?threads/2sk79-vfet-gain-stage.9801/
Source is a Vref modded dam1021 (rev2) DAC that’s hooked up via and XMOS USB interface to a WIN10 minimac running foobar2k with an ASIO plugin. The dam1021 raw output goes into a dcb1 unity gain jfet buffer, which in turn goes into a 10k Valab stepped attenuator, the output of which goes into another dcb1 buffer.
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