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

Solid State Talk all about solid state amplification.

new to amp design
new to amp design
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 2nd November 2001, 08:19 PM   #1
neurot is offline neurot
diyAudio Member
Join Date: Jul 2001
Location: TX
I have read Mr. Slones book and I will be taking more classes next semester about basic electronics, so I don't have boatloads of knowledge.

Regarding the power supply/transformers and calculations for VA ratings, I noticed that if the current was higher ( ex. 5A and 100V as opposed to 4A and 125V) the wattage output is higher. As I am new to this, I would just like to understand how this happens. But after looking at the Seal electronics site, the VA rating and the secondary voltage was lower than what I was calculating, which was odd to me because I just worked the problem both forward and back and was getting higher numbers. Is there a broad range of numbers to use for transformers for a specific power output?

Also, is it possible to increase the power supply, but leave the amplifier circuitry the same to increase output? Or is there something aside from power output thats dependent on an exact amount for the voltage rails inside the amp circuit?

Thanks for any help.
  Reply With Quote
Old 3rd November 2001, 02:47 AM   #2
Damon Hill is offline Damon Hill  United States
diyAudio Member
Join Date: Mar 2001
Location: Auburn, WA (somewhere between Seattle and Tacoma)
Send a message via ICQ to Damon Hill
With a given transformer rating, specify the voltage
first and then you can change the current rating to
get the power output you want. Power is voltage times
current and can vary voltage and current in either
direction to get a given power rating for the transformer,
but not necessarily for a specific amplifier design.

You can increase the power supply voltage somewhat,
but run an increased risk of exceeding the voltage rating
of one or more components, and the current rating of
the output transistors (the Safe Operating Area) into
a given load.

Output power is a function of the load impendance and
the voltage swing; a solid state amplifier can deliver
roughly twice the power into a four ohm load than it can
into an eight ohm load. (A transformer-coupled tube amplifier can match itself to a load for a constant power
output.) Just don't expect to >reliably< get four times
the power into a 2 ohm load; even if the power supply itself
could deliver the power, the output stage might fail from

When in doubt stick to the design, or ask the designer or
someone expert for help.
  Reply With Quote
Old 3rd November 2001, 08:22 PM   #3
neurot is offline neurot
diyAudio Member
Join Date: Jul 2001
Location: TX
thanks for the help.
  Reply With Quote


new to amp designHide 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
Collated Design Criteria/dimensions for Ariel ML-TL Design talsius Full Range 1 13th October 2011 05:28 AM
Wilson Watt Puppy Clone Design - Design Review Please soundengine355 Multi-Way 8 15th August 2008 02:07 PM
4th order bandpass, wheel well design :) (design inside) TWOJZ Car Audio 28 13th January 2008 02:56 PM

New To Site? Need Help?

All times are GMT. The time now is 04:37 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio