2017年4月25日 · Re: How to buy Linear Systems dual JFETs (LSK489, LSK389) « Reply #1 on: May 30, 2017, 02:10:27 am » Linear Systems advises they have many distributors in Europe that will take orders, provided with credit card number or do a …

2017年10月13日 · I'm hoping that choosing the LSK389 two-matched-on-one-die version will save me some trouble getting stereo pairs. The example circuit is meant to be the input stage for a MM RIAA preamp. Looking at the simulation's directive (.trans), why would it show using the 'C' grade yielding half the harmonic distortion compared to using the 'B' grade JFET?

2011年9月30日 · If you are asking for LSK389 & LSK170, then you can find them here : Linear Systems Ecommerce Site Powered by Micross Components LSK174 I have never heard of. LSJ74 we have all been waiting since 2006, or even earlier ?? The manufacturer has been saying that they are available soon, since then. Patrick

2015年2月13日 · For LSK389, try LSK489, datasheet show lower Ciss. R. rsavas. Member. Joined 2012. 2015-02-14 3:40 am #9

2023年5月16日 · Clearing out some spare parts - all parts 100% genuine bought from here or Linear systems, if the prices are off let me know or make offers 6 x LSK389 = £10 EACH / all 6 for £50 4 x 2SK117BL matched= £20 all 4 4 x LSK170A unmatched = £28 all 4 4 x LSJ74 unmatched = £28 all 4 all 8 K170/J74 for...

2010年1月14日 · This group buy is for the Linear Systems LSK389 Low Noise Dual JFet. I found out that I practically live in the backyard of one of the distributors for Linear Systems. I can get to their warehouse in 5 minutes by car. Some of you have expressed interest in the TO-71 version, B grade. This is rated at 6 - 12 ma Idss.

2008年12月20日 · Just as everyone else, I am running down on my reserve of 2SK389/2SJ109s, and am looking for the best possible substitute. The LSK389 is only available in N-JFET, and is not pin compatible. So for me no solution. The most obvious solution is to use still available 2SK170/2SJ74 matched pairs...

2013年4月22日 · The bags containing the parts are labeled that way, but on the metal cans, I can read «LSK389» and «LS439». There is no printing on the parts about IDSS range like Toshiba did. Some quick testing gives an IDSS of 2.9 to 5.4mA for the LSK389 and a pinch-off voltage of 2.9 to 3.5V for the LS493.

2024年6月7日 · The JFE2140 / LSK389 LSK489 dual JFET combination used provides significant improvement in THD and noise compared to the use of the chipamp alone, thanks to its extremely low noise. The composite feedback rate is 26dB (20x). In this way, ~1.25v RMS input signal is sufficient for full power.

Additionally, the LSK389 provides a low input noise to capacitance product that has nearly zero popcorn noise. The narrow ranges of the IDSS electrical grades combined with the superior matching performance of the LSK389's monolithic dual construction promote ease of device tolerance in low voltage applications, as compared