New DC to AC to high voltage AC idea? - 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 21st September 2012, 04:33 AM   #1
diyAudio Member
 
Join Date: Sep 2012
Default New DC to AC to high voltage AC idea?

ok so i just have two tiny double A batteries and a low power 50 watt 12 inch old subwoofer
i have a wire set just touching the middle of one lead from the positive side of the battery so that it keeps a constant on and off signal and the negative side of the battery goes directly to the other lead..and in between the positive side of the battery and the wire that goes to the (middle of the lead that goes to the speaker)
i have a transformer that converts the voltage to a higher voltage
how this works is when the power from the batteries hits the subwoofer.. the speaker moves up and since the lead is only touching the wire that goes to the battery but not staying connected to it. once the speaker goes back down to its resting place the speaker is hit again from the voltage of the batteries and the cycle is repeated
and in doing so it produces a sort of AC?
the switching speed is low enough to be around 50-60hz it's as close as i can get
also i tested the transformer and it does indeed produce very high voltage of over 90 volts at the output side!!
when i hook something up to the output of the transformer it makes sparks go flyin for a half second when i connect the output to some other high voltage device!

is there some way to simplify this into a smaller circuit with the same output or better output results?

there is no resistors diodes transistors or capacitors in this DC to AC circuit I made!
and it works pretty darn good and doesn't drain the batteries too much at all it's been running for about an hour hooked up to a high voltage lamp and it's been going strong for a long time and still going (although the noise from the subwoofer is annoying I managed to block out the sound somewhat
and somehow even though its so noisy my mom is able to sleep on the couch right next to me haha
so does anyone think that this could be useful somehow?
  Reply With Quote
Old 21st September 2012, 09:22 AM   #2
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
That sounds like the doorbell plus transformer which I used as a youngster (12 or 13?) to make some sparks. I now hate to think what it was doing to my neighbour's TV and radio reception! At the time I was too ignorant to think about such things.
  Reply With Quote
Old 21st September 2012, 09:29 AM   #3
M Gregg is offline M Gregg  United Kingdom
diyAudio Member
 
M Gregg's Avatar
 
Join Date: Jun 2010
Location: UK
LOL,

It sounds like a relay with its coil powered via the normaly closed contact..

Feeding a transformer...connect a capacitor across the coil to slug the relay.

The free added extra is a pile of noise created by the back EMF and magnetic interference...
great for testing your amp for pick up.. <<<watch it melt down with instability..LOL
The sub woofer is probably better you can test your tubes for microphonics at the same time..Thump crackle, thump burrr, thump clang,

I think you will find its not a sort of AC its a sort of square wave chopped DC + a pile of Hash.. (ie you cannot transform DC ..yes you can if you chop it into a square wave or switch it on and off)

Regards
M. Gregg
__________________
What is the sound of one hand clapping?

Last edited by M Gregg; 21st September 2012 at 09:51 AM.
  Reply With Quote
Old 21st September 2012, 09:57 AM   #4
diyAudio Member
 
Join Date: Mar 2011
Location: Jarna
The Flintstone SMPS !!

A couple of motors connected and you got a smaller unit then the woofer.
  Reply With Quote
Old 21st September 2012, 10:41 AM   #5
diyAudio Member
 
sofaspud's Avatar
 
Join Date: Nov 2005
Location: San Antonio
Flintstones LOL
The mechanical action makes me think of a hydraulic ram for some reason. OP, it isn't really useful. The reason is that the same thing can be done far more efficiently without moving parts... well, the only moving parts are electrons in a conductor. But I think your tabletop experimenting is great.
__________________
It is error only, and not truth, that shrinks from enquiry. - Thomas Paine
  Reply With Quote
Old 21st September 2012, 03:03 PM   #6
diyAudio Member
 
tubelab.com's Avatar
 
Join Date: Jul 2005
Location: West Virginia panhandle
This is not a new idea.....this is exactly how car radios made in the 1940's and 1950's made 300 volts from a 6 volt car battery to power the vacuum tubes. The really old tube testers had sockets to test the "vibrator".

My first car had a pair of 6V6's operating from a 6 volt car battery. It was a 1949 Plymouth.

Vibrator Power Supplies
__________________
Too much power is almost enough! Turn it up till it explodes - then back up just a little.
  Reply With Quote
Old 21st September 2012, 07:12 PM   #7
diyAudio Member
 
Join Date: Sep 2012
well it generates over 100 volts with just one double A battery because when i hook a light bulb up to it the bulb lights up easily!
and yes i think its a chopped square wave so im just using the subwoofer as a fast on and off switch
and i think i can convert the high voltage back down to high current and lower voltage somehow
but i dont want to blow something up with that LOL but it could be useful in powering something at the beach with some little puny batteries lol
very very good lifetime of these batteries actually! after an hour of running powering something they aren't even warm! they're still stone cold! it's really cool!
  Reply With Quote
Old 21st September 2012, 07:35 PM   #8
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
There are better methods, but it is fun to play.
  Reply With Quote
Old 22nd September 2012, 03:10 AM   #9
diyAudio Member
 
Join Date: Jul 2008
DC to AC inverters are dirt cheap right now.....
  Reply With Quote
Old 25th September 2012, 04:17 AM   #10
diyAudio Member
 
Join Date: Dec 2010
Location: wigan
Hey realflow it is sounding like you have invented the perfect perpetual energy converter .. Well done . Now would be a good time to get paranoid as the oil companys will be wanting a quiet chat with you alone in a secluded woods ..
  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
Need schematic for AC to DC converter (12V AC in to 12-18V DC out) maurycy Power Supplies 6 6th January 2012 08:27 PM
Mesure DC in AC outlets Cant find what is making noise in my AC 30CCX Help!!! !!! Ulisez Power Supplies 13 23rd November 2010 06:42 AM
18V AC+ 12V AC to +/-15V DC?? Elbert Power Supplies 8 24th July 2010 06:10 PM
heater voltage: why ac, and not dc? alex278 Tubes / Valves 18 7th October 2005 12:21 PM
Oil Capacitor DC vs. AC Voltage Rating valveitude Tubes / Valves 2 10th June 2005 11:45 PM


New To Site? Need Help?

All times are GMT. The time now is 02:17 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