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6th November 2010, 12:45 PM
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#1 |
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diyAudio Member
Join Date: Jul 2005
Location: milan
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a JLH variation
introducing a Push Pull BJT on driver
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visit my best audio idea http://www.esafono.it/DACTONE.htm |
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6th November 2010, 05:27 PM
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#2 |
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diyAudio Member
Join Date: May 2008
Location: On a mushroom
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Hi
i have seen it before -- built it - -- as with usual JLH it's ok Tried it asa headphone amp for a while
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Hum likes to have a nice "Noise to Signal" ratio  To "Hum" is to be noticed  Quality hum is when it pours out of Electrostatic speakers
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6th November 2010, 07:55 PM
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#3 |
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diyAudio Member
Join Date: Jul 2005
Location: milan
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input bipolar
is a little NPN (C2240) to have inverted output
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visit my best audio idea http://www.esafono.it/DACTONE.htm |
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6th November 2010, 09:18 PM
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#4 |
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diyAudio Member
Join Date: May 2008
Location: On a mushroom
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Here's where I had seen it
The Class-A Amplifier Site - JLH Class-A Update other variants are there also
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Hum likes to have a nice "Noise to Signal" ratio To "Hum" is to be noticed Quality hum is when it pours out of Electrostatic speakers
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6th November 2010, 09:37 PM
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#5 |
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Formerly Thanh1973
Join Date: Nov 2006
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That link does not look like what stee has posted.
For one have a look at the feed back of Stee's version. It goes to the base of the transistor. The second difference I see, is Stee has an extra driver transistor, where the JLH only has one driver transistor.
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"No, this sucker's electrical, but I need a nuclear reaction to generate the 1.21 gigawatts of electricity I need." |
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6th November 2010, 09:59 PM
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#6 |
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diyAudio Member
Join Date: May 2008
Location: On a mushroom
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I never said it was exact - It's the same basic concept - the other big difference I note is that there are no chinese characters in the link I put up
__________________
Hum likes to have a nice "Noise to Signal" ratio To "Hum" is to be noticed Quality hum is when it pours out of Electrostatic speakers
Last edited by PhaseLockLoopy; 6th November 2010 at 10:04 PM. |
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6th November 2010, 10:57 PM
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#7 |
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Formerly Thanh1973
Join Date: Nov 2006
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__________________
"No, this sucker's electrical, but I need a nuclear reaction to generate the 1.21 gigawatts of electricity I need." |
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