diyAudio (
-   Pass Labs (
-   -   Favorite Threads and Posts in "Pass Labs" (

hifimaker 22nd August 2008 05:00 PM

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


elac310 26th December 2008 06:08 PM

ALEPH gain and gain adjustment

steevelewis 20th November 2009 02:14 PM

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 12th October 2013 03:40 PM

Here are some sticky suggestions:

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

flg 27th December 2013 04:36 PM

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 18th March 2014 12:03 PM

Soundhappy 10th September 2014 11:22 PM

Zen Mod 10th September 2014 11:33 PM

naah ......

everybody know that Pub is best thread in Papaland

even if it's more place than thread


Soundhappy 11th September 2014 12:29 AM

Naah ? Ok but not off topic
Very rare pearls by Zen Mod
Thanks Mighty :D

Soundhappy 17th January 2017 07:20 PM

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

Year of the Vfets amplifiers :treasure:

All times are GMT. The time now is 06:50 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 17.65%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio