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17th February 2006, 10:56 PM
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#21 | |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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Quote:
hehe-nice to see that your mom looks better than you  spending some time with parents is always more and more valuable ,as years going by.......... now,I just wait to see steen's pics here......... 
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my Papa is smarter than your Nelson ! tnx to  clean  thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb
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18th February 2006, 01:52 AM
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#23 | |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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Quote:
hehe magical eraser you miss one black spot under the source of Jfet....... no SRPP no Mu folower plain ole cascode less gain........ more distortion.... I have no doubt that steen will try this too and let us know what is more pleasent to ear.........
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my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb
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18th February 2006, 08:52 AM
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#26 | |
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diyAudio Member
Join Date: Jul 2001
Location: The Netherlands
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Quote:
Ah ok, the Drain and Gate are at the same voltage.... Source sits at about 4 volts less ... the 220uF cap averages out the rimmple at the gate ... but what happens if rimmple becomes 1Vpp before the Drain ... the limmited Drain-Source voltage will limmit the effectiveness of this cap-multiplier arangment.. that's just a waste ! I think a voltage-divider (1 resistor to ground), ensuring at least 5 or 5.5 volt drain-source would enhance the performance of this circuit significantly... 1 resistor could make a lot of differnce here man! I a real BJT cap-multiplier, such a voltage divider isn't nessecary because the base-current will cause a voltage-drop allong the base resistor, providing room for some ripple before smoothing...but with a MOSFET , no gate current, so no voltage drop .. |
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18th February 2006, 09:07 AM
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#27 | |
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diyAudio Member
Join Date: Mar 2004
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Guy's, thanks a lot for all the input
 Quote:
If you look at the circuit (regulator) You will see that it is a copy of the Zen regulator. Only thing missing is the zenerstring from R8 to ground. I also have some big BJT's that I could put in, if that is better. Steen
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18th February 2006, 09:37 AM
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#30 |
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diyAudio Member
Join Date: Jul 2001
Location: The Netherlands
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and don't worrie about it to much... but it looked like a wasted oppotunity to me that's all .... MOSFET is fine is that position, for BJT you may have to change more values so just leave it the way it is...
...  allthough a BTJ would give you 3 or 4 more Volt output......
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