Output impedience ? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

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

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 21st June 2003, 03:23 AM   #1
diyAudio Member
 
Join Date: Jan 2002
Location: Tyrone Ga. U.S.A.
Default Output impedience ?

I know this a little off topic but I have a question. If I used a 6dj8
with a 2.2k plate resistor my output impedience would be ~ 1.1k ok!
if I replace the 6dj8 with a mosfet say a irf510 how would I figure
my output impedience? ie. 2.2k in parallel with ?

Thanks,

Woody
  Reply With Quote
Old 21st June 2003, 03:49 AM   #2
diyAudio Member
 
Tube_Dude's Avatar
 
Join Date: Mar 2002
Location: Aveiro-Portugal
Default Re: Output impedience ?

Quote:
Originally posted by bob12345678
I know this a little off topic but I have a question. If I used a 6dj8
with a 2.2k plate resistor my output impedience would be ~ 1.1k ok!
if I replace the 6dj8 with a mosfet say a irf510 how would I figure
my output impedience? ie. 2.2k in parallel with ?

Thanks,

Woody
The output impedance will be +- 2.2k...

2.2k will be in parallel with a imperfect constante current source...so in parallel with a very high impedance...the 2.2k will dominate the output impedance

Regards
__________________
Jorge
  Reply With Quote
Old 21st June 2003, 05:57 AM   #3
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
Quote:
If I used a 6dj8 with a 2.2k plate resistor my output impedience would be ~ 1.1k ok!
That depends on the plate current and the cathode degeneration. I think it will, in most cases, be somewhat higher than that. Either way, that will be one unhappy 6DJ8!

Unless of course you want a lot of distortion.
__________________
You might be screaming "No, no, no" and all they hear is "Who wants cake?" Let me tell you something: They all do. They all want cake.- Wilford Brimley
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Adding secondary of output transformer into cathodes of output stage ? Eico ST-70 freddymac406 Tubes / Valves 3 21st April 2007 06:15 PM
Help measuring output impedience woody Tubes / Valves 2 22nd February 2005 11:30 PM
Cathode bipass capacitor and transformer impedience woody Tubes / Valves 9 26th December 2003 01:07 PM
I2S digital output in Marantz CD4000 and four TDA1541A with balance analog output iklari14 Digital Source 30 18th July 2003 12:57 PM
Output impedience ? woody Solid State 1 25th December 2002 06:29 PM


New To Site? Need Help?

All times are GMT. The time now is 08:06 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2