A show of hands: What JFET/MOSFET and Alps RK27 you want to buy?

zhoufang · 02:36 PM

I'm about to order more variety of Jfet/Mosfet for resale.
So what are the parts you wanted to get, but:

can't find anywhere
can't find them matched
can't get at reasonable cost

A list of what I might consider are:

JFET

2SK170-BL/V
2SK369BL
2SK264-BL / 2SJ103-BL
2SK117-BL

Most of these JFET should be around $30-40/100 unmatched, $45-60/100 matched. Smaller quantity will be at slightly higher price

MOSFET

2SK1530 / 2SJ201 about $12-18/pair matched
2SK1529 / 2SJ200 about $6-9/pair matched
2SK3497 / 2SJ618 about $6-9/pair matched

Volume control - Alps RK27

stereo 10K 20K
quad (for balanced) 10k, 20k, 50k

If there is sufficient demand, I'll be more than happy to bring them to you at reasonable price.

d to the g · 3rd February 2010, 02:34 PM

move to vendor forum?

housing · 03:18 PM

2sk246-bl / 2sj103-bl

Volume control - Alps RK27
quad (for balanced) 10k, 20k, 50k

dux · 3rd February 2010, 06:20 PM

Am interested in some matched 2SK1530 / 2SJ201 and alps pots
Thank you

Michi124 · 3rd February 2010, 06:41 PM

Alps RK27 20K stereo for B1 buffer...

zhoufang · 3rd February 2010, 07:42 PM

Quote:

Originally Posted by Michi124

Alps RK27 20K stereo for B1 buffer...

We are thinking inline.
A pre-amp with:
jfet buffer -> volume control -> jfet buffer
is exactly where I feel the need for 10k or 20k pots.

The input buffer typically shows no sig. increase in distortion for down to 10K load, and the output buffer shows no sig. increase in distortion (due to gate capacitance) with up to 10K input.
This makes 10-20k pot most reasonable.

Luke · 4th February 2010, 05:54 AM

2sj74, 2sj109

flancfuster · 6th April 2010, 05:26 PM

I'm interested in 2SK3497 / 2SJ618. Any chance to find these mosfet?

zhoufang · 6th April 2010, 05:59 PM

These are certainly possible, you are the 2nd person to ask about this pair.
In fact this pair is not that much more expensive than IRFP240/9240, provided quantity in 1000 or more.
So if I see more interest , I will make them available.
In the mean time, I have to finish matching my Semisouth JFET and 2SK1530/2SJ201.

Cal Weldon · 6th April 2010, 06:57 PM

zhoufang,

Please do not post in the Swap Meet area anymore

3rd February 2010, 02:30 PM	#1
zhoufang diyAudio Member Join Date: Nov 2008	A show of hands: What JFET/MOSFET and Alps RK27 you want to buy? I'm about to order more variety of Jfet/Mosfet for resale. So what are the parts you wanted to get, but: can't find anywhere can't find them matched can't get at reasonable cost A list of what I might consider are: JFET 2SK170-BL/V 2SK369BL 2SK264-BL / 2SJ103-BL 2SK117-BL Most of these JFET should be around $30-40/100 unmatched, $45-60/100 matched. Smaller quantity will be at slightly higher price MOSFET 2SK1530 / 2SJ201 about $12-18/pair matched 2SK1529 / 2SJ200 about $6-9/pair matched 2SK3497 / 2SJ618 about $6-9/pair matched Volume control - Alps RK27 stereo 10K 20K quad (for balanced) 10k, 20k, 50k If there is sufficient demand, I'll be more than happy to bring them to you at reasonable price. __________________ Toshiba 2SK170-GR/BL/V, 2SK246/2SJ103, 2SK369-BL, Semisouth JFet R100, R550 & R085, Keratherm Red Isolators, AD1865N-K, 2SK1530/2SJ201, 2SK2013/2SJ313 ALPS RK27 20KA2/50KA4 Last edited by zhoufang; 3rd February 2010 at 02:36 PM.

3rd February 2010, 03:15 PM	#3
housing diyAudio Member Join Date: Nov 2006	2sk246-bl / 2sj103-bl Volume control - Alps RK27 quad (for balanced) 10k, 20k, 50k Last edited by housing; 3rd February 2010 at 03:18 PM.

3rd February 2010, 06:41 PM	#5
Michi124 diyAudio Member Join Date: Dec 2003 Location: Berlin, Germany	Alps RK27 20K stereo for B1 buffer... __________________ Brutalized by bass and terrorized by treble...

4th February 2010, 05:54 AM	#7
Luke diyAudio Member Join Date: Sep 2001 Location: Wellington NZ	2sj74, 2sj109 __________________ If you give a man a fish he will eat for a day. But if you teach a man to fish he will buy an ugly hat. And if you talk about fish to a starving man then you are a consultant. Dilbert

6th April 2010, 05:59 PM	#9
zhoufang diyAudio Member Join Date: Nov 2008	These are certainly possible, you are the 2nd person to ask about this pair. In fact this pair is not that much more expensive than IRFP240/9240, provided quantity in 1000 or more. So if I see more interest , I will make them available. In the mean time, I have to finish matching my Semisouth JFET and 2SK1530/2SJ201. __________________ Toshiba 2SK170-GR/BL/V, 2SK246/2SJ103, 2SK369-BL, Semisouth JFet R100, R550 & R085, Keratherm Red Isolators, AD1865N-K, 2SK1530/2SJ201, 2SK2013/2SJ313 ALPS RK27 20KA2/50KA4


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3rd February 2010, 02:34 PM	#2
d to the g diyAudio Member Join Date: Aug 2006 Location: minimalopolis	move to vendor forum?

3rd February 2010, 06:20 PM	#4
dux diyAudio Member Join Date: Jun 2004 Location: Zagreb	Am interested in some matched 2SK1530 / 2SJ201 and alps pots Thank you

6th April 2010, 05:26 PM	#8
flancfuster diyAudio Member Join Date: Dec 2009 Location: Romania	I'm interested in 2SK3497 / 2SJ618. Any chance to find these mosfet?

6th April 2010, 06:57 PM	#10
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	zhoufang, Please do not post in the Swap Meet area anymore __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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