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30th January 2013, 09:41 PM
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#341 | |
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diyAudio Moderator R.I.P.
Join Date: Nov 2005
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Quote:
 anyway transistors are just random scrap, but shows to be convenient for moving around resistors are very scratched from pulling in and out but doesn't matter since I measure every time I move them board could have been bigger though |
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8th February 2013, 10:38 PM
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#343 |
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diyAudio Member
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Success!
Cheers.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer! Need something built, repaired or modded? PM me and ask what I can do! |
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10th February 2013, 04:28 AM
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#344 |
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diyAudio Member
Join Date: Aug 2011
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hi kean,
i've build a +rail of of your k-multiplier using this part q2 sa1873 q1 bc337 c1 1000uf/50v d4/d1 1n4002 other same as schematic on your web here my measuring dc in 21.7v dc out 20.14v ac in 136mv ac out 95mv is this working good? |
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10th February 2013, 04:38 AM
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#346 |
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diyAudio Member
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95mV output AC is waaay too high. It should be in the 100uV range. If you short your meter leads what is the lowest AC it reads? Or did you use a scope?
What is the AC voltage across C1?
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer! Need something built, repaired or modded? PM me and ask what I can do! |
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10th February 2013, 05:01 AM
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#348 |
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diyAudio Member
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It sounds like something is shorting R2. Can you measure DC across R2?
How much total capacitance is at the output?
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer! Need something built, repaired or modded? PM me and ask what I can do! |
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10th February 2013, 05:34 AM
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#350 |
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diyAudio Member
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Load it with something for 30mA. A 560R 1W resistor would work. It may behave funny without any load.
__________________
The Kmultiplier rail filter! -=- The Simple Kuartlotron Superbuffer! Need something built, repaired or modded? PM me and ask what I can do! |
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