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K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences. |
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K&K Audio / Lundahl Transformers Welcome! Need support, you got it. Or share youe ideas and experiences. |
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In Reply to: Kurt one question.. posted by C.Y on November 10, 2002 at 03:58:04:
It had two PNP's like a C4S except I changed the top LED to a 5.6V zener diode bypassed with a 10uF tantalum cap. The lower LED is changed to a 2.2K resistor. A small 1uF polycarbonate cap is used to "bootstrap" from lower PNP's base to upper PNP's emitter. A 2K resistor is used to set the 2.5 mA bias in the upper emitter. The cap choices are not that critical.Kurt
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- Re: Kurt one question.. - Kurt Strain 12:51:48 11/15/02 (0)
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