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DIY Sony VFET lottery discussion
DIY Sony VFET lottery discussion
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Old Yesterday, 07:16 PM   #871
KT is offline KT  United States
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Quote:
Originally Posted by mbrennwa View Post
Yes... but my point was: isn't this the opposite of what was intended?

Since the target is "advanced beginners", I'd say the next lottery should be considered to be more in favor of these guys.

It's my understanding that the advanced beginner designation refers to the difficulty level of the build (which is good information to have for any kind of kit).

So it is informational, to let the builder know how much experience one should have to tackle the project comfortable, if I understand it correctly.
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Old Yesterday, 08:46 PM   #872
Eric is offline Eric  United States
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DIY Sony VFET lottery discussion
Quote:
Originally Posted by cRomer View Post
May I clarify what you got. 2 Sony 2SJ28 or 2 IOR IRF250 ?
On each side of 6L6ís pics there is one Sony 2SJ28 and one IRF250.
Thank you.
I have some extra 2SJ28 (P-ch) vFets in TO-3 cans, each marked KF-33 that came from Acronman in Singapore. I am willing to get these into the hands of someone that wants to pick up one of the "vFet-less board kits" that will be offered after the lottery is concluded. This will enable someone else to build one of these great amps. I do not have any IOR IRF250...
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Old Yesterday, 08:56 PM   #873
Benjisan is offline Benjisan  United States
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Quote:
Originally Posted by Eric View Post
I have some extra 2SJ28 (P-ch) vFets in TO-3 cans, each marked KF-33 that came from Acronman in Singapore. I am willing to get these into the hands of someone that wants to pick up one of the "vFet-less board kits" that will be offered after the lottery is concluded. This will enable someone else to build one of these great amps. I do not have any IOR IRF250...
Pm sent.
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Old Yesterday, 09:28 PM   #874
cRomer is online now cRomer  United States
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Thank you. Hope someone has an extra pair of the IRF250. Iíd buy them and yours.
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Old Yesterday, 09:32 PM   #875
Super_BQ is online now Super_BQ  New Zealand
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Quote:
Originally Posted by Rodeodave View Post
I think you may be confusing the CSX2 with the 2017 diy Sony VFET amp?

I've been eyeing the CSX1/2 for a long time. Some day I'll find the time, and transformers, and the brackets...
Going by Mr Pass's timeline release of the VFets here:

https://www.diyaudio.com/forums/atta...y-vfet-pt1-pdf

The CSX1 is version 1 2013 Sony VFETs Part 1

The CSX2 is version 2 2014 Sony VFETs Part 2

Don' t know about the 2017 DIY VFet release? But both versions are very different and from what I read (vaguely) both have different (but still good) sound. It will be interesting to see how the new single ended designs will sound
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Old Yesterday, 09:35 PM   #876
mordikai is offline mordikai  United States
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Quote:
Originally Posted by Eric View Post
I have some extra 2SJ28 (P-ch) vFets in TO-3 cans, each marked KF-33 that came from Acronman in Singapore. I am willing to get these into the hands of someone that wants to pick up one of the "vFet-less board kits" that will be offered after the lottery is concluded. This will enable someone else to build one of these great amps. I do not have any IOR IRF250...
I need 1- 2sj28 if you can spare it?
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Old Yesterday, 10:04 PM   #877
feds27 is offline feds27  United States
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Quote:
Originally Posted by Super_BQ View Post
Going by Mr Pass's timeline release of the VFets here:

https://www.diyaudio.com/forums/atta...y-vfet-pt1-pdf

The CSX1 is version 1 2013 Sony VFETs Part 1

The CSX2 is version 2 2014 Sony VFETs Part 2

Don' t know about the 2017 DIY VFet release? But both versions are very different and from what I read (vaguely) both have different (but still good) sound. It will be interesting to see how the new single ended designs will sound
Iím pretty sure the Part 1 article describes both CSX1 and CSX2 designs which are Common Source Mode. His Part 2 article shares his design for a Common Drain Mode. They never really named this version and I think most people refer to it as Part 2 VFET or 2017 VFET (the boards that are being sold on the diystore are for this version).
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Old Today, 12:03 AM   #878
Jason is offline Jason  Australia
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DIY Sony VFET lottery discussion
Quote:
Originally Posted by KT View Post
It's my understanding that the advanced beginner designation refers to the difficulty level of the build (which is good information to have for any kind of kit).

So it is informational, to let the builder know how much experience one should have to tackle the project comfortable, if I understand it correctly.
Correct. I wanted to publish a note about the difficulty level so everyone, especially newbies, were aware of the difficulty level of this project. Hence the "Is this for me?" section of the store's VFET information page.

We describe the ACA as a beginner project, but still some people gave us feedback that they were beginners but they struggled. It's arguably "beginner" for someone who has done some soldering before and "advanced" for someone who doesn't know what a soldering iron is. Everything is relative.

I have been thinking about how to better represent difficulty level, and I think an accompanying list of abilities, knowledge and experience that is expected is a better idea than "beginner", "intermediate", "advanced". By the way the software we use at guides.diyaudio.com has no way to customize the terms, so it is stuck with "easy", "medium", "hard" which are even more subjective. Easy for... who?

Anyway... based on feedback I received "advanced-beginner to intermediate" was agreed upon as something acceptable to publish. "advanced-beginner" is not intended to be the target market, just the absolute bottom entry point in terms of experience and I wanted to make the point that this is "not recommended for first time builders".

As ever, we'll learn from feedback and iteratively improve communication...

Quote:
Originally Posted by buckaroo2 View Post
FWIW, I was one of the fortunate few who "won" the lottery even though I had been a lurker for years and only registered the day before the lottery... a bit of a statistical fluke that sorta validates the random nature of the lottery draw in a way, I guess.
Welcome aboard!

Quote:
Originally Posted by 6L6 View Post
I realize I did not articulate that properly...
The lottery will reward the heavy posters, (and has) but as those winners are removed from the pool the newer people (who are the advanced beginners in large part) will have a greater possibility of winning.
As Jim said, the lottery heavily favoured established contributors, while also letting people like buckaroo have a chance (there were 850 lurkers I think, and 5 got one). There was no way of doing things that would make everyone happy. Now the heavy hitters are mostly out of the pool, there are half as many tickets, and odds for everyone appear to be approximately doubled for round 2.

Whether the spread was a good one will only be evident once we see who (successfully) builds it and shares the experience with the community in a reasonable time.

Last edited by Jason; Today at 12:48 AM.
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Old Today, 01:51 AM   #879
studeb is online now studeb  United States
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I am probably one of those "lurkers" although I prefer to think of myself as dormant or having limited multitasking skills. I am sorry to report to those at the top of the waitlist that i paid for my kit today. I was egged on by the infamous post #308, if someone whiles about a lottery, well then i might as well build this one. Had better odds with this than with SNKRS or Comic-con tix.........
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