Besides the point and only as info, lsj74 and lsk170 are currently available at Digikey. However the price for ready matched sets in the diyastore appears like bargain.
Yes I asked before like the OP and yes I am sure the first stone did not come from me. The question itself is indeed enough for hefty reactions and quite personal overreacting like you demonstrate.
It is becoming nasty. Probably some need an audio-Bhagwan and don’t tolerate anything even slightly resembling criticism.
So ciao! Have fun.
It is becoming nasty. Probably some need an audio-Bhagwan and don’t tolerate anything even slightly resembling criticism.
So ciao! Have fun.
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instead of throwing stones (as usual) you could use your own expertise, go with list of articles on https://www.firstwatt.com/articles.html , and list ones which corresponds with OP question
and I'll do that exactly, later tonight
new Maxima for Papaland:
"Use your Brain, don't use obsolete Toshibas"
and I'll do that exactly, later tonight
new Maxima for Papaland:
"Use your Brain, don't use obsolete Toshibas"
I'm not sure what all the hushed secrecy was about - here's a front end in plain sight, with Nelson planning an amp output to go with it.
I do have a pair of Sony SIT devices looking for a design. All very up in the air at the moment. I use tubes - I'm not a ss designer at all.
I just ordered two back panel kits from the DIY Store (I like the binding posts for VFET amp). Then I also ordered 2SK170/2SJ74 matched octet for future builds. As I did the same with previous orders I think I have devices for many builds. So these devices are as easy to get than any current 2023 devices and we don't need that many for our builds when it can be purchased as matched devices. Just a suggestion to add these devices when you order other stuff at the DIY Store. Apart from that I purchased in local market 1000 pcs. J113 so I have some alternative devices to play with. Very low noise op-amps are also a possibility.
wow. Why is everyone so uptight about this reasonable, innocuous question? a little too defensive.
list of constructions not using obsolete JFets, just from FW Articles page :
- 1977 A20 Amplifier
- 1978 A40 Amplifier (also look at 2000 A40 Parts Subs)
- 1981 Mosfet Citation 12
- 1992 A75 Amplifier Part 1 and Part 2 (with Norman Thagard)
- 1994 Zen Amplifier
- 1994 Zen Amp redux
- 1994 Bride of Zen
- 1997 Son of Zen
- 1997 Balanced Zen Line Stage
- 1998 DIY Op Amps
- 2001 Zen Variations 1
- 2002 Zen Variations 2
- 2002 Zen Variations 3
- 2002 Zen Variations 4
- 2003 Zen Variations 5
- 2004 Zen Variations 6
- 2004 Zen Variations 7
- 2005 Zen Variations 8
- 2005 PLH Amplifier
- 2006 Zen Variations 9
- 2010 De-Lite Amplifier
- 2015 Zen With GA10JT12
- 2018 H2 Generator
- 2019 H2 Harmonic Generator - Revised
- 2020 DIY Biamp 6-24 Crossover
- 2021 DIY H2 Generator v2
- 2022 DIY Front End 2022
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no one is uptight about OP question, he's simply trying to get information ....... question legitimate 158%
now, there are few members with nasty habit of constant commenting that some parts are obsolete and that publishing constructions containing those is not in DIY Spirit
I can write entire forum page with arguments why is that simply stupid, but one thing is simplest to write - someone shared own (successful) construction, and people are arguing and bashing his choice of components
whatever state (on market, availability) of parts in question is, complaining in that context (sharing, not forcing anyone to do something) is ........
do the same on Tube forum, say something to TubeLab George or any other decade long contributor
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Discussions are for sissies. Real men fight. In their underwear, in winter. Perhaps even using a Zardoz costume
One possibility might be to bolt a 2022 Front End onto an M2 output stage. It looks like with standoffs the FE board from the store should bolt onto Tea Bag’s M2 board right where the transformer goes.
How wide are the M2 PCBs? Anyone know? The ones with standoffs for the FE board?
I have odd size heat sinks.
I have odd size heat sinks.
The following design approach seems to have been relatively successful at eliminating Toshiba JFETs:
OBTW, the M2x circuit boards fit the diyAudio Store's "Universal Mounting Specification" (link) , so you could eyeball the photos of the M2x PCBs and estimate their approximate size by referring to the mounting bolt X- and Y- spacings in the UMS spec. The board overhangs the bolt holes by an eyeball estimated little bit. Cartoon below.
_
OBTW, the M2x circuit boards fit the diyAudio Store's "Universal Mounting Specification" (link) , so you could eyeball the photos of the M2x PCBs and estimate their approximate size by referring to the mounting bolt X- and Y- spacings in the UMS spec. The board overhangs the bolt holes by an eyeball estimated little bit. Cartoon below.
_
Attachments
Interesting question Andy and interesting discussion. In tubes there are cheap, hidden gems - what is available in SS land?
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That 2022 DIY front end sure looks like a nice little project to play with. Zen Mod's clone of the New Stasis front end has a SMD option for JFETs.
Tubes are SO much easier for availability. No problem at all buying tubes from the 1920s - there are still plenty about. And loads of substitutes that work with only small modifications. If anything was future proof it was tubes.
Here is the 2022 front end:
https://www.diyaudio.com/community/threads/diy-front-end-2022.394339/
Here is the stasis thread:
https://www.diyaudio.com/community/threads/new-stasis-front-end.363701/
https://www.diyaudio.com/community/threads/diy-front-end-2022.394339/
Here is the stasis thread:
https://www.diyaudio.com/community/threads/new-stasis-front-end.363701/
Agreed. 👍
Against who?
Please note that if your statement were true, and I don't know, then IMHO fighting presumes the existence of an enemy, but an enemy can have many faces and there are also invisible enemies that strike you without exposing themselves.
So before to "fight" you should first understand if there is an enemy and then being possibly able to recognize him. 😉
Back to the topic, my humble opinion is the following: in Italy (I believe elsewhere too) there is a legal concept recognized in the face of the law called "diligence of the good father of a family" that is self-explaining.
Well, if I wanted to build a DIY motorcycle today then in the name of diligence of the good father of a family I would look for spare parts of current availability and I believe it would be illogical to do the opposite.
Unless there were obvious advantages in doing the opposite: are there?
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