Direct drive amp schematic - Page 2

Calvin · 11th December 2005, 02:30 PM

Hi,

what I´ve listened to is without any relevance for the prob.
ESLs work by voltage not by current. It would be practically impossible to build a constant current amp for the whole audio band.

Calvin

Bazukaz · 12th December 2005, 10:50 PM

Hi,
I have an idea to take regular driver IC and use it to drive high voltage transistors.
It is possible , and would this schematic work ?

Lukas

el`Ol · 13th December 2005, 04:13 AM

Here is a discussion about Class D with thyratrons.
tubes in class d?

Calvin · 13th December 2005, 08:25 AM

Hi,

@Bazukaz

It won´t work with this schematic, because the output Trannies work as Buffers with an voltage amplification of ~1. Therefore the driver circuit (the IC) has to supply all the needed voltage which it doesn´t.
The thing could work with added circuitry, that steps up the low output voltage of the IC to the desired high level. But adding steps means adding probs with phaseshift and stability and..and....and........

jauu
Calvin

hilbren · 13th December 2005, 04:03 PM

http://www.headwize.com/projects/sho...ilmore_prj.htm

http://www.ultranalog.com/
- http://ultranalog.com/9912/9912.html
- http://ultranalog.com/9912/phylira2.html
- http://ultranalog.com/9912/p25/
- http://ultranalog.com/coldwar/
(only problem with this schematics is; i don't see ANY feetback??)

can anyone give me a gues of the price of one of those schematics?

Bazukaz · 14th December 2005, 09:04 PM

I think that direct drive amps are generally better then output trannies.
Transformer gives much more distortion than amplifier itself.

ESL's are very efficient.Almost all power is dissipated in amplifier.
So , a new type of amplifier that could use this feature of ESL is required .

I don't even imagine how such an amplifier should look like ...

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11th December 2005, 02:30 PM	#11
Calvin diyAudio Member Join Date: Nov 2004 Location: close to Basel	Hi, what I´ve listened to is without any relevance for the prob. ESLs work by voltage not by current. It would be practically impossible to build a constant current amp for the whole audio band. Calvin

13th December 2005, 04:13 AM	#13
el`Ol diyAudio Member Join Date: May 2005 Location: Bavarian Forest	Here is a discussion about Class D with thyratrons. tubes in class d?

13th December 2005, 08:25 AM	#14
Calvin diyAudio Member Join Date: Nov 2004 Location: close to Basel	Hi, @Bazukaz It won´t work with this schematic, because the output Trannies work as Buffers with an voltage amplification of ~1. Therefore the driver circuit (the IC) has to supply all the needed voltage which it doesn´t. The thing could work with added circuitry, that steps up the low output voltage of the IC to the desired high level. But adding steps means adding probs with phaseshift and stability and..and....and........ jauu Calvin

13th December 2005, 04:03 PM	#15
hilbren diyAudio Member Join Date: Jul 2003 Location: utrecht	http://www.headwize.com/projects/sho...ilmore_prj.htm http://www.ultranalog.com/ - http://ultranalog.com/9912/9912.html - http://ultranalog.com/9912/phylira2.html - http://ultranalog.com/9912/p25/ - http://ultranalog.com/coldwar/ (only problem with this schematics is; i don't see ANY feetback??) can anyone give me a gues of the price of one of those schematics?

14th December 2005, 09:04 PM	#16
Bazukaz diyAudio Member Join Date: Nov 2005 Location: Vilnius	I think that direct drive amps are generally better then output trannies. Transformer gives much more distortion than amplifier itself. ESL's are very efficient.Almost all power is dissipated in amplifier. So , a new type of amplifier that could use this feature of ESL is required . I don't even imagine how such an amplifier should look like ...

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