Confusion about Rectified voltage... - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Tubelab
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tubelab Discussion and support of Tubelab products, prototypes and experiments

Thread Tools Search this Thread
Old 20th May 2010, 09:11 AM   #1
Skorpio is offline Skorpio  Denmark
diyAudio Member
Join Date: Mar 2004
Location: Denmark
Default Confusion about Rectified voltage...

I have some 450V RIFA capacitors I would like to use in the PSU for my simple SE.

The rectifier will be GZ34 and transformer is 335-0-335/300mA type.

The current draw will be between 120-140mA total, and in the Philips datasheet on GZ34 the DC voltage with a 60uF capacitor can be read for the curves. I find a voltage here between 398-410V depended on current draw.

On the other hand using this calculator site:

I get voltages between 442-469V at the closest trafo voltages...?

Something must be wrong somewhere?
  Reply With Quote
Old 20th May 2010, 12:32 PM   #2
diyAudio Member
Tubelab_com's Avatar
Join Date: Jul 2005
Location: West Virginia panhandle
I find a voltage here between 398-410V depended on current draw.
Experience shows that to be closest to what you will actually get. It really depends on what voltage your power transformer actually delivers in circuit under load. I have used some Hammond 300-0-300 volt transformers that actually deliver 320-0-320 and I get 360 volts of B+ in a Simple SE. I have also used some surplus 330-0-330 volt transformers that give me 400 volts of B+. The voltage might spike to nearly 450 volts if the rectifier warms up faster than the output tubes (usually the case). Your caps should have a 500 volt or so surge rating so this is OK.
Tubelab, it's 5 year mission. To explore strange new tubes, to seek out new circuits and topologies, to boldly go where no tube has gone before......
  Reply With Quote


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
Pass X250.5 Voltage Change Confusion Jazzo Pass Labs 20 18th June 2009 07:38 PM
Voltage Gain Confusion!! apehead Tubes / Valves 6 6th November 2007 01:47 AM
Rectified heater voltage problems? eeka chu Tubes / Valves 26 9th January 2004 04:29 PM

New To Site? Need Help?

All times are GMT. The time now is 02:55 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2