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Old 27th March 2013, 11:32 AM   #11
mars2 is offline mars2  Switzerland
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Yes, hum and other in phase noise should be cancelled with balanced signals.
Think that in any way, there should be a suitable conversion from balanced to SE or a continued usage of the balanced signal way.
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Old 27th March 2013, 11:46 AM   #12
back is offline back  Greece
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that was my question.because brian wrote that you get the voltage swing but not the cancellation.i don`t see why not.
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Old 27th March 2013, 12:13 PM   #13
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Hello,
A better tube output stage is the Broskie unbalancer, gives you high gain and low output impedance.
Scroll down to "Unbalancer as I-to-V Converter"

Here's a thread about it.

Regards,
Danny
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Old 27th March 2013, 02:32 PM   #14
mars2 is offline mars2  Switzerland
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That`s what I mentioned in a previous post - with the lampizator circuit, you`ll never get an exact conversion as for example the broskie circuit with a long tailed pair differential amplifier, followed by his cathode follower.
This configuration should definitifely give top conversion and sound quality!
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Old 27th March 2013, 03:58 PM   #15
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Quote:
Originally Posted by danny_66 View Post
Hello,
A better tube output stage is the Broskie unbalancer, gives you high gain and low output impedance.
Scroll down to "Unbalancer as I-to-V Converter"

Here's a thread about it.

Regards,
Danny
That is a much better circuit.

However, if you want the ES9018 to act as a current source, you want your I/V stage to present mOhm-level input impedance.
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Old 27th March 2013, 04:49 PM   #16
mars2 is offline mars2  Switzerland
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Buffalo II & transformers


...the only way to go for current output with a tube stage
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Old 27th April 2013, 04:19 PM   #17
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Quote:
Originally Posted by mars2 View Post
Buffalo II & transformers


...the only way to go for current output with a tube stage
How is it possible to have a tube stage with zero input resistance to force the buffalo to work in current mode? Most of the implementations in the thread u posted present a dc resistance at the input of tube stage that does not allow current mode.
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Old 30th April 2013, 02:25 PM   #18
mars2 is offline mars2  Switzerland
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It`s not zero input impedance (we all want to listen to something, do we?), it`s a low-ohm resistor.
Let`s take 0.5ohms for example...
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Old 30th April 2013, 05:09 PM   #19
4est is offline 4est  United States
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I am confused as to what particular tube stage you are suggesting, or do you mean in general to use a low Z transformer coupled one?

Quote:
Originally Posted by mars2 View Post
Buffalo II & transformers


...the only way to go for current output with a tube stage
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Old 2nd May 2013, 10:26 AM   #20
mars2 is offline mars2  Switzerland
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@4est:
I mean in general using a low resistor (not low Z transformer) as I/V directly at the output of the chip, followed by a min. 10x step-up transformer (f.ex. a MC-transformer).
The following tube stage should then be a high-gm/transconductance one (5842, D3a, 6E5P etc.).
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