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 19th September 2004, 02:07 AM   #1
diyAudio Member
 
Join Date: Sep 2004
Location: indiana
Default Power supply load capacity

In designing a power supply for my current prodject, I am questioning a couple of things someone may be able to answer for me?
Although I have ample heater taps on my pwr trans, I was wandering if I use another filament transformer that I have instead of using all of the heater taps on my supply trans if it would help take some of the load off of my main transformer?
I know that it would reduce the heat factor somewhat, but what Im getting at is I plan on pushing the b+ winding a bit into the upper limits. By taking some of the load off of the main tranny heater windings couldnt I push the b+ a little more? How does the load on one winding affect the other? Thanks to all who take time to post replies in advance!
  Reply With Quote
Old 19th September 2004, 10:17 AM   #2
SHiFTY is offline SHiFTY  New Zealand
diyAudio Member
 
SHiFTY's Avatar
 
Join Date: Jul 2002
Location: New Zealand
You certainly could do this, as a transformers main rating is VA ( volt*amps) By having filaments powered by another tranny you will reduce the load somewhat.

The best way to tell is heat- if your transformer is too hot to touch after an hour then you are drawing too much from it. Also regulation is another thing- if you are approaching the limits of the core, the voltage will be all over the place...
  Reply With Quote
Old 19th September 2004, 11:24 AM   #3
mcs is offline mcs  Denmark
diyAudio Member
 
Join Date: Aug 2003
Location: Denmark
Default Re: Power supply load capacity

Quote:
Originally posted by Dr.Frankenstein
By taking some of the load off of the main tranny heater windings couldnt I push the b+ a little more?
That depends on how the transformer is made. If the wire used for the B+ winding is just thick enough for the rated current, you can't get more current from it (it will just get too hot and break).

If the wire is thicker than needed, then you can get more current from one winding, if you don't load the other windings.

Best regards,

Mikkel C. Simonsen
__________________
My personal electronics website
Remote control kits website
  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
Resistor Power Capacity JMB Solid State 10 27th March 2008 09:35 PM
if a power supply load is pulling 3A, does it means... jarthel Parts 8 24th April 2007 12:58 PM
ATX power supply needs a load to run??????? Video Freak Everything Else 2 8th February 2007 11:44 AM
Power supply FET's overheats in seconds - no load, why? valterdaw Car Audio 12 2nd July 2006 01:46 PM
No Load Voltage on Zen V4 Power Supply vsr123 Pass Labs 13 5th May 2003 04:10 PM


New To Site? Need Help?

All times are GMT. The time now is 12:25 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