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

Instruments and Amps Everything that makes music, Especially including instrument amps.

First guitar amp build power supply question.
First guitar amp build power supply question.
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 10th August 2009, 06:42 AM   #1
OrganicBud is offline OrganicBud  United States
diyAudio Member
Join Date: Feb 2009
Default First guitar amp build power supply question.

Well, I've got the transformers. Hammond 374BX for power and 1650NA for the output. 4H choke. Its going to be running two EL34s. NOw, I will readily admit that this amp is based off of a Super Reverb AA1069. But barely. The taps for the B+ coming off the power xfrmr are 375 volts, and the original Fender filter caps for the power stage are two 70mfds, but I want more punch, and I was going to bump them up to 200 to 220mfd. Its going to have SS rectification as well. The OT is rated for 60 watts.

Bumping up the filter caps to 200-220mfd each would be safe, right?
  Reply With Quote
Old 10th August 2009, 08:58 AM   #2
Akita is offline Akita  Malaysia
diyAudio Member
Join Date: Dec 2006
Location: Kuala Lumpur
I would use 100uf --> 4H --> 440uf for a CLC filter with SS rectification.
  Reply With Quote
Old 10th August 2009, 09:23 AM   #3
Geek is offline Geek
diyAudio Member
Geek's Avatar
Join Date: Sep 2004
You don't need a lot of cap with a PP amp, because the rail noise is cancelled out in both the PI and output circuit. It's the divider down the line that needs the smooth power.

I've never used more than 47uF --> 5H --> 47uF to the power tubes and all has been well. But since you're using SS, Akita's advice looks nice

Oh... do use fast recovery types - it makes a difference.

  Reply With Quote


First guitar amp build power supply question.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
how to build a 12 volt dc power supply? michelevit Class D 5 22nd December 2006 08:53 AM
i want to build a power supply! 12volt dc michelevit Power Supplies 3 6th January 2006 06:00 AM
Do i need to build main supply (240v) filter?Or build power distribution? thomgun_lc Chip Amps 9 16th September 2005 10:52 AM
Build a Power supply For amp. Dj BASS AMP Car Audio 3 24th May 2004 05:23 AM

New To Site? Need Help?

All times are GMT. The time now is 07:44 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio