Power transformer question (Bud?? calling Bud) - 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 10th March 2010, 06:05 PM   #1
diyAudio Member
 
Join Date: Sep 2008
Default Power transformer question (Bud?? calling Bud)

Can anyone help me understand what a "vibrator" tranformer is? From what I can gather, it is a tranformer that steps up battery level DC to higher voltage. Guess they were in old autos -- stepping up voltages from the battery for tube radio use. I presume this topology got replaced by the 12V space charged tube lines -- right?

Is it possible to step up DC to DC or am I not reading things right? Does anyone still make these? Why did they go away? -- was it that this topology didn't work well or was it part of the overall move to the smaller tube packages.

Thx.
__________________
"Life is hard -- afterall it kills you ..."
Katharine Hepburn
  Reply With Quote
Old 10th March 2010, 06:30 PM   #2
Svein_B is offline Svein_B  Norway
diyAudio Member
 
Join Date: Oct 2005
The reason they lost their popularity was the transistor.
(even us guys in the tube forum are probably vaguely familiar with them).

The vibrator makes a buzzing sound, and makes AC from the car's 12V so it can be transformed up to a couple 100 volts and rectified for tube power.

You can find some on Ebay if you want: vibrator transformer, eBay Motors, Toys Hobbies. Great deals on eBay!
  Reply With Quote
Old 10th March 2010, 07:35 PM   #3
diyAudio Member
 
Join Date: Sep 2008
Quote:
Originally Posted by Svein_B View Post
The reason they lost their popularity was the transistor.
Thanks much for the info -- not sure where the transistor fits in -- sorry for my denseness.
__________________
"Life is hard -- afterall it kills you ..."
Katharine Hepburn
  Reply With Quote
Old 10th March 2010, 08:20 PM   #4
OneyedK is offline OneyedK  Belgium
diyAudio Member
 
Join Date: Oct 2007
Quote:
Originally Posted by moonbird View Post
-- not sure where the transistor fits in --
Transistor circuits don't need high voltage, they can be fed directly from a 12V car battery...
  Reply With Quote
Old 10th March 2010, 08:27 PM   #5
diyAudio Member
 
coldcathode's Avatar
 
Join Date: Jan 2009
A Vibrator was used to convert DC to AC then a transformer could step up the voltage and then you could rectify it BACK to a higher voltage DC. Can't "step up" DC voltage in the NON-TRANSISTORIZED realm.
  Reply With Quote
Old 10th March 2010, 09:20 PM   #6
diyAudio Member
 
Join Date: Sep 2008
Default Different things yes?

Soooo - we are talking about two different devices here -- there is the vibrator which is presumably some kinda oscillator that takes 12V DC and makes it 12V AC (or thereabouts -- probably some loss). THEN the "vibrator" transformer (so named because it took 12V AC input) did the step-up . OK I got it -- thx again.
__________________
"Life is hard -- afterall it kills you ..."
Katharine Hepburn
  Reply With Quote
Old 10th March 2010, 11:53 PM   #7
diyAudio Member
 
Join Date: Apr 2003
Location: Portland,Oregon
Blog Entries: 4
Send a message via AIM to DigitalJunkie
Some info on vibrator supplies..

Vibrator Power Supplies
B+ Power Supplies
  Reply With Quote
Old 11th March 2010, 03:04 PM   #8
diyAudio Member
 
Gary P's Avatar
 
Join Date: Apr 2002
Location: Portland OR
Just think of a vibrator power supply as a very early switching supply...
__________________
http://www.pimmlabs.com/
  Reply With Quote
Old 11th March 2010, 03:20 PM   #9
TheGimp is offline TheGimp  United States
diyAudio Member
 
TheGimp's Avatar
 
Join Date: Aug 2009
Location: Johnson City, TN
The vibrator can be viewed as a specialized type of relay wired with one set of NC contacts in series with the input voltage to the coil. A second set of contacts controls power to the vibrator transformer.

When power is applied, the coil is energizes through the NC contact and field piece pulls in breaking the NC contact and killing power to the coil. It oscillates. Switching time is controlled by mechanical design, spring strength to filed piece, coil strength, etc.
  Reply With Quote
Old 11th March 2010, 04:19 PM   #10
Svein_B is offline Svein_B  Norway
diyAudio Member
 
Join Date: Oct 2005
I had not seen this one:

Click the image to open in full size.
B+ Power Supplies

With mechanical rectifier, making a virtual DC-to-DC transformer.

SveinB
  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
Lowther DX4 with Bud Purvine Enabl pattern limono Swap Meet 8 14th January 2009 10:12 PM
Power transformer question keithgreenhalgh Tubes / Valves 4 6th August 2008 07:37 AM
transformer power question needtubes Parts 2 9th April 2004 11:13 AM
i am new, power transformer question i_drives Parts 1 25th November 2003 12:53 AM
power transformer question Bill Fitzpatrick Solid State 5 8th June 2001 04:22 AM


New To Site? Need Help?

All times are GMT. The time now is 12:42 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