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Old 23rd January 2013, 06:00 AM   #1
Stee is offline Stee  Italy
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Default a transformer as an amplifier

is probably the sound of the transformer, the best you can raise to the heavens of Music

you will say that is not new
In fact, there is no tone mark

here is a good example of an application
without special components

you can test the validity of the argument by placing a normal amplifier with unity gain
thus eliminating the resistance of the inverting input which is connected to ground
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Last edited by Stee; 23rd January 2013 at 02:55 PM.
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Old 23rd January 2013, 06:10 AM   #2
CBS240 is offline CBS240  United States
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If it was soooooooo easy, it would have completely nullified the existence of the Solid State forum looooooong ago.
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Old 23rd January 2013, 07:04 PM   #3
Elias is offline Elias  Finland
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Quote:
a transformer as an amplifier
I kind of agree. I like the transformer as a gain device.

Only thing to argue may be the implementation
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Old 24th January 2013, 01:08 PM   #4
Stee is offline Stee  Italy
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Default NEED FOUR BUFFER FOR CHANNEL

and a simple transformer from a Main-adaptor!
(230/12V 10W)
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Old 24th January 2013, 01:23 PM   #5
jaycee is offline jaycee  United Kingdom
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See Susan Parker's Zeus power amp:
Zero Feedback Transformer Audio Power Amplifier
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Old 24th January 2013, 05:40 PM   #6
Stee is offline Stee  Italy
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Thanks I know She
http://www.esafono.it/Vivace.pdf
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Old 28th January 2013, 07:39 AM   #7
Elias is offline Elias  Finland
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Quote:
Originally Posted by jaycee View Post
See Susan Parker's Zeus power amp:
Zero Feedback Transformer Audio Power Amplifier
I think it is a bad idea put the transformer at the output. The current through the transformer should be minimised, not maximised as happends at the output.

Better to use transformer as small signal voltage gain stage at the input and use electronic current buffer at the output.


- Elias
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Old 28th January 2013, 04:19 PM   #8
Stee is offline Stee  Italy
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Yes Elias you are right
download again vivace.pdf
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Old 21st February 2013, 12:34 PM   #9
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Quote:
Originally Posted by Elias View Post
I think it is a bad idea put the transformer at the output. The current through the transformer should be minimised, not maximised as happens at the output.

Better to use transformer as small signal voltage gain stage at the input and use electronic current buffer at the output.
- Elias
Given the sophistication of your analysis techniques for speakers on your home page I am surprised at the above statement since all speaker driver units are transformers.

Electric Flux <<->> Acoustic Vibration

Or perhaps I am missing something here?



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Old 22nd February 2013, 10:03 AM   #10
Elias is offline Elias  Finland
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Thank you for the kind words regarding my home page

There is however one distinct difference between a transformer in question here and a drive unit: saturating core. High energy signals are poison for the core magnetism. For me it is counter productive to put a transformer at the position of the highest energy in the signal chain. I would rather use a transformer in earlier stages at lower energy levels.

Maybe you have pondered the option too, using only input transformer as a voltage gain stage and e.g. a source follower for output buffer driving the speaker ?

As a side note, I think it is magnetic flux, not electric, causing cone vibration in a moving coil speaker, or maybe you are talking about ESL.


- Elias

Quote:
Originally Posted by Susan-Parker View Post
Given the sophistication of your analysis techniques for speakers on your home page I am surprised at the above statement since all speaker driver units are transformers.

Electric Flux <<->> Acoustic Vibration

Or perhaps I am missing something here?



Best,
Susan.
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