Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 23rd May 2002, 12:42 AM   #31
Warp Engineer
On Holiday
 
AudioFreak's Avatar
 
Join Date: Oct 2001
Location: Queensland, Australia
Kilowatt,
and 300V not 300W


NU_NRG,

Nothing you can really do. Assuming both transformers are identical, it's just the inherent inefficiency of a single transformer squared. DO NOT try to join the 2 cores!
  Reply With Quote
Old 23rd May 2002, 12:48 AM   #32
diyAudio Member
 
NU_NRG's Avatar
 
Join Date: Dec 2001
Location: Quebec, CANADA
Send a message via ICQ to NU_NRG
Smile me likes warnings...

AudioFreak- Not that i don't believe you, but i've seen some of those over the years... whats the big danger? Over fluxing of the cores?


kilowatt- thanks for your feedback, btw sorry I got off topic with that question...


-Simon
  Reply With Quote
Old 25th May 2002, 04:29 AM   #33
diyAudio Member
 
Join Date: Nov 2001
Location: Harlowton, MT, USA
Yes, I meant 300V or course. Typos can happen to the best of us.
  Reply With Quote
Old 25th May 2002, 08:23 AM   #34
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Default 120->12->12->120

Quote:
"hook them back to back" if this means 120V AC (prim) -> 12V AV (sec) -> 12V AC (prim) -> 120V AC (sec)
I've seen this done in tube circuits fairly often (using 12V filament transformers) but only for small amps and preamps that only need 120-150 V or with a doubler twice that.

In his case he has a 480 VA (less with the extra transformer losses) isolation transformer.

As to sucking the juice out of the wall, it was done all the time with 5-tube radios, and small console hifis. My 5-buck amp started just that way. I added a 120V isolation trafo from a ground fault isolator to make it safe when i rebuilt it -- sort of at the opposite end of the spectrum from the kilowatts beast at a healthy 1 and a bit watts.

I think it would be more fun to build an amp using the 40A 12+V Rails, than 4A 120V rails.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 28th May 2002, 02:50 PM   #35
diyAudio Member
 
NU_NRG's Avatar
 
Join Date: Dec 2001
Location: Quebec, CANADA
Send a message via ICQ to NU_NRG
Default interesting idea...

Quote:
I think it would be more fun to build an amp using the 40A 12+V Rails, than 4A 120V rails.
Would it be possible to acheive stable, high power amp with low impedance loads?

A subwofer amp that could drive .25Ohm loads at 500W ???



what do you all think?



-Simon
  Reply With Quote
Old 28th May 2002, 08:49 PM   #36
diyAudio Member
 
Join Date: Nov 2001
Location: Harlowton, MT, USA
Yeah Bill F. had a thread about a low impedance amp a while back. He wanted to drive a huge wall of speakers in parallel, but I don't think he wanted very much power. You should check it out.
  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
Tubelab Simple SE with big honkin' Edcors? rknize Tubelab 122 14th February 2011 04:22 AM
Zeny based on Nelson Pass cascode design jh6you Pass Labs 132 30th April 2007 05:21 AM
Big Honkin Tele jaymanaa Tubes / Valves 5 30th April 2006 10:55 AM


New To Site? Need Help?

All times are GMT. The time now is 06:49 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