Favorite Threads and Posts in "Pass Labs"

[hifimaker]

A few fav's:

Top ten ways to a better Aleph

The Aleph-X (original Thread)

Hifizen's Aleph-X Official PCB rev. Alpha

Hifizen's Aleph-X Boards

Aleph-X High Powered Version

-David

 

[elac310]

ALEPH gain and gain adjustment

http://www.diyaudio.com/forums/showthread.php?threadid=37008&highlight=

http://www.diyaudio.com/forums/showthread/t-1926.html

http://www.diyaudio.com/forums/showthread/t-800.html

http://www.diyaudio.com/forums/showthread/t-2008.html

 

[steevelewis]

Hello Friends.
Just read all the post over here, and would like to give my sincere thanks to all of you for providing such a valuable links and information along with your
comments. Really there are lots of valuable download in this forum topic.
Thanks and stay connect.

 

[12B4A]

Here are some sticky suggestions:

F4 Power Amplifier
F5 Power Amplifier
F6 Power Amplifier
Aleph J illustrated build guide

 

[flg]

SemiSouthFan: Not that I know of. SemiSouth did not produce one and my research group has not needed to produce one either. A SJEP120R100 SPICE model could be modified with a little scaling.

But truthfully, none of these models do a good job with the curvature of the output characteristics (ID vs. VDS) near saturation, a problem no one has been able to fix using the core SPICE JFET model. So predicting amplifier linearity with the available models is not recommended. It is ironic that the gradual "knee" or transition to saturation of the output curves for the R100 was viewed by the power switching community as a curiosity indicating lack of maturity in the channel design. Silicon power MOSFETs have sharper transitions, which is a major reason, in my analysis, for why the IRF parts deliver higher THD than the SemiSouth JFETs. What is one man's poison is another man's nectar.

Gee, I could be a poet.

For power switching, modeling near saturation is not really needed so it just hasn't been a priority, despite a few tries with only partial success. I have a need for modeling the transfer curves at the corners of the safe-operating-area (i.e., at hundreds of volts on the drain) and a student will finish a Master's Thesis on this improvement soon. But DIY Audio folks don't operate in that part of the device SOA, so I would say the available models are mostly useful for checking the basic functionality of a dc bias circuit because threshold and transfer curve modeling at low drain voltage is pretty good, and maybe some general guidance on AC operation, but not much more.

If there becomes a bigger demand, I might arrange for work on the near-saturation model to see if we can make this a better representation of the true characteristics. Maybe as an undergraduate research project.

 

[tiefbassuebertr]

http://www.diyaudio.com/forums/parts/151392-best-electrolytic-capacitors.html
http://www.diyaudio.com/forums/solid-state/2080-dc-filter.html

 

[Soundhappy]

http://www.diyaudio.com/forums/pass-labs/125765-leaving-class.html

http://www.diyaudio.com/forums/diyaudio-com-articles/160464-de-lite-amplifier.html

http://www.diyaudio.com/forums/pass-labs/153832-pass-delite-amp-baf.html

http://www.diyaudio.com/forums/pass-labs/253411-article-sony-vfets-part-1-a.html

http://www.diyaudio.com/forums/pass-labs/37262-mica-goop.html

http://www.diyaudio.com/forums/diyaudio-com-articles/200460-l-amp-simple-sit-amp-part-1-a.html

http://www.diyaudio.com/forums/diyaudio-com-articles/202480-l-amp-simple-sit-amp-part-deux.html

http://www.diyaudio.com/forums/pass-labs/201655-lamp-simple-sit-amp.html

http://www.diyaudio.com/forums/pass-labs/244926-ironamp-video-posted.html

 

[Zen Mod]

naah ......

everybody know that Pub is best thread in Papaland

even if it's more place than thread

 

[Soundhappy]

Naah ? Ok but not off topic
Very rare pearls by Zen Mod
Thanks Mighty 😀
http://www.diyaudio.com/forums/pass-labs/198589-papas-pubs.html

 

[Soundhappy]

All guides are fantastic well made thanks 6L6.
Start 2017 new year with my favorite thread :

http://www.diyaudio.com/forums/pass-labs/302380-sony-vfet-illustrated-build-guide.html

Year of the Vfets amplifiers

 

[Gyuri]

Yes.
It is the last year.
There never-ever will be more.

 

[Soundhappy]

Yes.
It is the last year.
There never-ever will be more.

Papa probably bring us on the diy bench big static induction transistors.
Get curve traced & matched 2SK180 pair's and hope for article in near future.

 

[TonyTecson]

http://www.diyaudio.com/forums/pass-labs/317563-replacement-toshiba-2sk170-2sj74.html#post5311533

 

[Soundhappy]

50w Single-Ended BAF2015 Schade Enabled

Build This MoFo!

B1 with Korg Triode

 

[pinkfloyd4ever]

Sound of various Pass amps

Particularly these posts

Papa 1

Papa 2

6L6

And the discussion of the F4 starting here

 

[Soundhappy]

Excellent build guide by 6L6 Korg NuTube B1 guide

 

[Soundhappy]

New 57 steps updated by 6L6 version B1 with Korg Nutube - diyAudio Guides

and all the next highly useful in the future

Amazing good work All Guides - diyAudio Guides Thanks!

 

[pinkfloyd4ever]

Yes and of course all the build guide threads by 6L6. To anyone unfamiliar, the links are in his signature https://www.diyaudio.com/forums/members/6l6.html

 

[codyt]

Really like how the logic is laid out. Stuff for beginners and beyond.

Hammond 193v Choke Loaded 2sk180 L’amp

 

[peppennino]

Build This MoFo! - diyAudio

Sound of various Pass amps

Aleph J illustrated build guide

B1 r2 proto or prod? & B1 Rev. 2

Pass Open Baffle: need help