20W PP Choke PSU Question - 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 July 2006, 05:57 PM   #1
diyAudio Member
 
sorenj07's Avatar
 
Join Date: May 2006
Default 20W PP Choke PSU Question

schematic:

http://www.bonavolta.ch/hobby/en/audio/6l6_2.htm
http://www.dc-daylight.ltd.uk/Valve-...H%26K-Fig3.pdf

Explanation of the following picture:

The power transformer is a series connection of two 275-volt secondaries, using real-world values that I measured from no load.

R1 is 10W, as is R2.

C1 is a huge 1250V film cap I pulled from a CRT monitor.
C2 and C3 are two 500V sections of a big LCR chassis-mount cap.
C4 is a big snap-connector Rubycon cap I pulled from same CRT

L1 is a Hammond 193M Enclosed, 10H, 300ma, 63 ohms, 800VDC
L2 is a Hammond 159V Open-style, 1.5H, 500ma, 27 ohms, 500VDC

B+ ends up being just at about 385V, but that's assuming a 300mA load.

Question: Do I put the 1N4007's series or parallel to not exceed their voltage rating? I had to put 2x1N4007 in order not to get an error message.

My PSU
Click the image to open in full size.


The PSUDII file is attached.

What do you think? Am I guessing the wrong current draw from two channels of the 20W schematic? I'd intended to use the secondaries in parallel but was only getting about 350V with decent filtering. Hum is about .4mV with this above design.
Attached Files
File Type: zip hafler_keroes_psu.zip (295 Bytes, 9 views)
  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
Question on choke BHD Tubes / Valves 2 11th June 2009 03:45 PM
Choke question JoshK Tubes / Valves 5 1st December 2008 03:31 PM
Choke question nkg Tubes / Valves 26 22nd November 2006 08:39 PM
Toroid choke question okkyn Tubes / Valves 3 24th December 2005 05:26 AM
choke and cap question Raj1 Tubes / Valves 2 2nd November 2003 02:30 PM


New To Site? Need Help?

All times are GMT. The time now is 02:18 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