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

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

pentode noise and local feedback
pentode noise and local feedback
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 10th August 2018, 09:14 PM   #31
6A3sUMMER is offline 6A3sUMMER  United States
diyAudio Member
 
Join Date: Jun 2016
A CCS that is far from perfect, but has Very Low noise is . . .
An Inductor

The possible problems with using an inductor as a CCS are:
hum pickup from magnetic fields - noise
DCR - noise
Inductance too low - low impedance at low frequencies
Distributed capacitance - low impedance at high frequencies
Expense
Weight
Real Estate

I have used inductors as CCS in cathode coupled phase splitters; and also in self inverting cathode coupled push pull output stages.
I have also used inductors as CCS in SE output stages (output transformers); not many think of it as a CCS (It just happens to be in parallel with the reflected load).
There is very little noise from any of these inductors, the exceptions are listed above.

One thing about these inductors, they do not self oscillate.
  Reply With Quote

Reply


pentode noise and local feedbackHide 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
Local Feedback for Push Pull Pentode dsavitsk Tubes / Valves 22 4th December 2013 07:48 AM
Powerdrive for PP amp with local feedback and pentode driver ? Jaap Tubes / Valves 5 5th November 2009 10:58 AM
Cascode with local feedback croccodillo Tubes / Valves 8 19th July 2007 04:30 PM
'Local Feedback and Nonlinearity of Multistage Feedback Amplifiers' mikeks Solid State 62 20th July 2005 09:03 AM


New To Site? Need Help?

All times are GMT. The time now is 08:49 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki