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JFETs from Linear Systems
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Old 26th March 2018, 08:01 AM   #91
Olaf S is offline Olaf S
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Join Date: Nov 2013
Hi, good morning from Germany.
My question, i would build a F5 TV3 with 8 transistors per rail.
Mr Pass wrote in the manual, in this case we must double the SJ74/Sk170 for stable operation.
Can i use one c oder d grade for this, or must i use a pair of B?

Kind regards
Olaf
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Old 13th September 2018, 03:29 AM   #92
mbedwani is offline mbedwani  Australia
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Wooo Hooo - DIYAudioStore has matched B's in stock
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Old 13th September 2018, 03:40 AM   #93
Jason is offline Jason  Australia
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JFETs from Linear Systems
They are indeed now back in stock. There is a limit of 1 per customer per month in order to keep these in the hands of DIYers who are making projects, so they all get used. If you need more than that for a special purpose, please email contact@diyaudistore.com.
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Old 12th November 2018, 10:15 AM   #94
astromo is offline astromo  Australia
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Default LSJ74 Resupply Forecast

Any forecast on the resupply of the LSJ74 matched pairs?
J74/J74 Stereo Differential Kit


I registered for notification but I think it's been more than a month now.


Any news, regardless of the answer, would be appreciated.


Cheers

Last edited by astromo; 12th November 2018 at 10:21 AM.
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Old 5th December 2018, 05:16 AM   #95
Jason is offline Jason  Australia
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JFETs from Linear Systems
Quote:
Originally Posted by astromo View Post
Any forecast on the resupply of the LSJ74 matched pairs?
J74/J74 Stereo Differential Kit


I registered for notification but I think it's been more than a month now.


Any news, regardless of the answer, would be appreciated.


Cheers
We are told "2-3 months", but that's been the case for a long time now. We're hopeful!
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Old 5th December 2018, 12:34 PM   #96
labjr is offline labjr  United States
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Quote:
Originally Posted by Jason View Post
We are told "2-3 months", but that's been the case for a long time now. We're hopeful!
I wonder they still seem to be unable to produce significant quantities of those parts in a timely manner?
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Old 5th December 2018, 08:58 PM   #97
Jason is offline Jason  Australia
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JFETs from Linear Systems
Quote:
Originally Posted by labjr View Post
I wonder they still seem to be unable to produce significant quantities of those parts in a timely manner?
Without going into too much detail: The amount of available parts = (production cycle duration * yield of parts from the fabrication process that meet all specifications, for each grade) - demand for each grade.

Speeding up the cycle, refining the fab process to create more yield of the spec most in demand, would resolve the situation, and I hear they are working on both angles.
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Old 10th February 2019, 09:08 AM   #98
hillextor is offline hillextor
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Hi Jason,
Do you know when the LSJ74B could be back in stock, I need 4 marched pairs of LSK170B/LSJ74 to replace the Toshiba part on an up amp
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Old 11th February 2019, 06:25 AM   #99
Jason is offline Jason  Australia
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JFETs from Linear Systems
There's matched NP pairs on their way, but our supplier currently has not given me an ETA for when they will ship. Hopefully they'll be available to purchase within the month.
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Old 11th February 2019, 07:13 AM   #100
astromo is offline astromo  Australia
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Quote:
Originally Posted by Jason View Post
There's matched NP pairs on their way, but our supplier currently has not given me an ETA for when they will ship. Hopefully they'll be available to purchase within the month.
Encouraging news. If NPs are on the horizon, what's the outlook for PPs to suit Aleph builds?

O Maybe split a few NPs and divert the N-JFETs to the ACA pile. Just putting it out there.
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