Reliable B+ PSU for pro preamp - 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 29th November 2007, 06:51 PM   #1
diyAudio Member
 
Join Date: Oct 2005
Default Reliable B+ PSU for pro preamp

Hi!

I need to design a good PSU for mic preamp.
B+ and heaters need to be regulated because that makes part of the sound.
PSU needs some kind of protection if any of it's components fail. This is very important.
It has to be based on SS devices because of small chasis.
I don't want fancy components or designs. I'm buying from Farnell.

B+ needs to be 290VDC/20-25mA.
Heaters need 6,3V/600-1000mA

Let me tell you about the circuit; it's based on EF86 input tube and E88CC output. There is 1:7 input and 7:1 output transformer.
I used good material like Solen caps for coupling, silver mica for the filters, big film caps for decoupling, transformers are Cinemag and so on.

So, what would you suggest me? I'm ok about heater, i take 317 and i'm done. I would like to have opinions about B+.

So far i found these circuits:

http://members.nuvox.net/~zt.robgrow...wersupply.html http://img150.imageshack.us/my.php?i...suschemiw8.jpg

Thanks!

Miha
  Reply With Quote
Old 30th November 2007, 03:14 AM   #2
diyAudio Member
 
astouffer's Avatar
 
Join Date: Jun 2004
Location: Pittsburgh, crumbling wasteland
See this link http://www.diyaudio.com/forums/showt...79#post1361779

For the heaters you could use an L200C regulator or 7806 with a schottky diode in the gnd leg to float .3 volts.
  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
Reliable source of 2SC3953?? kf_tam Parts 5 17th October 2011 12:08 PM
How Reliable Are McCauley Drivers? kelticwizard Multi-Way 16 19th August 2011 05:45 PM
Looking for a reliable 100w design rockgardenlove Solid State 3 11th February 2009 05:20 AM
www.thetubecenter.com = reliable? skyraider Tubes / Valves 4 22nd June 2008 12:49 AM
Help finding a reliable switch for DC csown Parts 0 16th April 2003 01:45 PM


New To Site? Need Help?

All times are GMT. The time now is 01:14 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