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

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Lowest noise BJT transistor?
Lowest noise BJT transistor?
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
Thread Tools Search this Thread
Old 17th October 2019, 08:00 AM   #141
mchambin is offline mchambin  France
diyAudio Member
Join Date: Mar 2011
As said:
Most audiophiles do not know about engineering.
Transistor junction temperature is not transistor case temperature.
  Reply With Quote
Old 20th October 2019, 06:59 AM   #142
SyncTronX is offline SyncTronX  United States
diyAudio Member
SyncTronX's Avatar
Join Date: Oct 2008
Location: New Projects Enter the Queue Oh My!
Default LIGO Confusion

Originally Posted by johnego View Post

It's an interesting article and good research.
My problem is trying to read the graphs, even when magnified.

Colors should have been further divided

using .........
or - - - - -

& - . - . - . - . etc.

At least that would separate the higher cost resistors
from the lower cost resistors and we could better see
which gives best cost:quiet ratio.

Issues I continue to have with it follow.

Figure 6: Be my guest.

Figure 7: Yel is good.
lt grn: good.

dk blue/gray: good

royal blue good.
org & brown: mediumgood.

Figure 8: Red looks good, but which lt. blue?
royal blues looks good, but which of the 3 oranges?

Figure 9: Doesn't count, too easy.

Figure 10: Which resistor?
lt grn: Yageo RC1206 or Vishaly Dale CMF55?
dk grn: Mira 0805 or Roederstein SMM0204-MS1?
Yel: Looks Good.

Pink: Yageo MF0207 or Welwyn RC55Y look good.

Figure 11: Which Resistor?
lt Blu: Yageo RC0805 or Vishay MMS0204? Wrong one is noisy.
org: MIRA 0805 or Susumu RG-Series?
-- Sync
  Reply With Quote
Old 20th October 2019, 08:00 AM   #143
johnego is online now johnego  Indonesia
diyAudio Member
Join Date: Dec 2017
Originally Posted by SyncTronX View Post
It's an interesting article and good research.
My problem is trying to read the graphs, even when magnified.
I printed it, viewed in large size to see the color, made notes. After that it was easy because the bad resistors are grouped already. When resistance is 1k (and above), none of the 100ppm is good enough.
  Reply With Quote
Old 20th October 2019, 01:36 PM   #144
gerhard is offline gerhard  Germany
diyAudio Member
gerhard's Avatar
Join Date: Oct 2005
Location: St. Wendel / Saar, SouthWest Germany
They also use thick and thin lines, but that does not help much.
At least 2 of the better ones seem to be easily sourced:

< Durchkontaktierbare Widerstande | Widerstande | DigiKey >

< LTW964TPW06030DB00 Vishay Dale | Kits | DigiKey >
"That's right!" shouted Vroomfondel, "we demand rigidly defined areas of doubt and uncertainty!" "We don't demand solid facts! What we demand is a total absence of solid facts. I demand that I may or may not be Vroomfondel!"

Last edited by gerhard; 20th October 2019 at 01:40 PM.
  Reply With Quote


Lowest noise BJT transistor?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
Can I build up these Darlington transistor if I use two BJT transistor ? gaborbela Parts 9 15th July 2010 07:30 PM
Which tubes are lowest noise? Joshua_G Tubes / Valves 49 30th January 2010 03:44 PM
Which is the lowest noise FET? Young Solid State 10 11th February 2006 05:20 AM
which is lowest noise bipolar? bane_982 Parts 1 4th March 2005 12:45 PM
Lowest noise levels difi Chip Amps 3 3rd March 2004 11:42 PM

New To Site? Need Help?

All times are GMT. The time now is 07:36 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio