Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

Pass HPA-1, what do we know?
Pass HPA-1, what do we know?
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 16th October 2018, 12:34 AM   #41
JeffYoung is offline JeffYoung  Ireland
diyAudio Member
 
JeffYoung's Avatar
 
Join Date: Jul 2017
Location: Ireland
Pass HPA-1, what do we know?
Right you are on the SILMICs. Forgot about that part.
  Reply With Quote
Old 19th October 2018, 10:11 PM   #42
Mark Johnson is online now Mark Johnson  United States
diyAudio Member
 
Mark Johnson's Avatar
 
Join Date: May 2011
Location: Silicon Valley
Pass HPA-1, what do we know?
TO92 device count suggests that Wilson current mirrors might very well be involved....
  Reply With Quote
Old 19th October 2018, 10:23 PM   #43
Hikari1 is offline Hikari1  United States
diyAudio Member
 
Join Date: Jun 2012
Location: Seattle
EVUL has been watching this thread...

UTHAiM -- Just for Fun
  Reply With Quote
Old 19th October 2018, 10:49 PM   #44
JeffYoung is offline JeffYoung  Ireland
diyAudio Member
 
JeffYoung's Avatar
 
Join Date: Jul 2017
Location: Ireland
Pass HPA-1, what do we know?
I agree about the Wilson. A Buffered Feedback mirror also has 3 transistors, but the connections don't appear to match what little we can see on the board.

Thanks for that link, Hikari. The UTHAiM definitely looks to be a kissing cousin.
  Reply With Quote
Old 19th October 2018, 11:01 PM   #45
Hikari1 is offline Hikari1  United States
diyAudio Member
 
Join Date: Jun 2012
Location: Seattle
Also this topology:

Cubie2

I use the front end of this as a preamp. Very, very good.
  Reply With Quote
Old 20th October 2018, 10:51 PM   #46
JeffYoung is offline JeffYoung  Ireland
diyAudio Member
 
JeffYoung's Avatar
 
Join Date: Jul 2017
Location: Ireland
Pass HPA-1, what do we know?
Oh no. Now I have to figure out what a "folded cascode" is....
  Reply With Quote

Reply


Pass HPA-1, what do we know?Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
My first Desktop HPA The Coolest Headphone Systems 19 26th November 2015 06:04 PM
HPA-nxV300 & HPA-nxV300se what's the difference? pcsl999 Holton Precision Audio 14 3rd September 2013 11:24 PM
HPA-nxV101 Signature sonnya Holton Precision Audio 10 28th July 2012 09:10 AM
MI-HPA banginon Music 0 10th February 2011 05:40 AM
HPA-nxV201 Released Soon! The Saint Holton Precision Audio 5 23rd September 2009 06:33 AM


New To Site? Need Help?

All times are GMT. The time now is 02:08 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki