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 10th July 2004, 05:33 PM   #1
diyAudio Member
 
Join Date: Jan 2004
Location: Minnesota
Default power supply help!!!!

ok guys and gals help me out here..

what I am looking to do is a power supply for my EL84 pre-amp.

I will use plate loading chokes as loads (100H) but unsure still on operating current and power supply voltage.

Thing is this: I want to use tubes that are available today for the power supply. Can I do a shunt regulation with tubes in current production??

How about series regulation?

Or.... should I forget all that and just do a LCLC power supply with the final seperate LC sections going to each channel??

Or... SS power supply?

Finally, and hints on a good operating point for the EL84 triode mode??

Thanks!!!

Richard
  Reply With Quote
Old 10th July 2004, 07:31 PM   #2
G is offline G  United States
diyAudio Member
 
G's Avatar
 
Join Date: Apr 2002
Location: Belleville, IL.
Default Re: power supply help!!!!

Quote:
I will use plate loading chokes as loads (100H) but unsure still on operating current and power supply voltage.
You need to look at a data sheet and decide.

Quote:
Thing is this: I want to use tubes that are available today for the power supply. Can I do a shunt regulation with tubes in current production??
Yes.

Quote:
How about series regulation?
If you prefer.

Quote:
Or.... should I forget all that and just do a LCLC power supply with the final seperate LC sections going to each channel??
That is what I would do.

Quote:
Or... SS power supply?
That is not what I would do.

Quote:
Finally, and hints on a good operating point for the EL84 triode mode??
Again. You need to download a data sheet or search for some SE EL84 circuits and look at what has been done before. No need to reinvent the wheel. Get it working before you try turning it into the space shuttle. I would not bias the EL84 for more than about 15mA for use in a linestage. That is me though. Be aware that when using plate loading chokes that it is not necessary to drop the same voltage across the choke as you do across the tube. Not that you would be able to anyway. Try for a B+ of 265 and set the current for 15mA and I think you will be pleased with the sound.

Quote:
Thanks!!!
Your welcome.
__________________
Gavin
  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
Split Voltage Switching Power Supply for Power Amp vectorplane Swap Meet 2 23rd April 2011 11:48 PM
LTspice tool for power amp power supply component evaluation andy_c Software Tools 2 23rd August 2009 05:10 PM
Can i use a computer power supply to power audio amplifiers? destroyer X Solid State 91 25th September 2006 04:36 AM
selling high current power supply for power amps. ericpeters Swap Meet 0 14th January 2005 02:21 PM
heater supply (xformer specs are 6.3V 2.5A) as supply for a power LED? jarthel Tubes / Valves 10 21st July 2003 01:30 PM


New To Site? Need Help?

All times are GMT. The time now is 11:39 AM.


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