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Old 9th June 2011, 01:12 PM   #1
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Default JLH Headphone Class A


I have built the attached circuit. Works fine and sounds good. But I have questions about the input wiring. In the original article - circuit 2 (The Class-A Amplifier Site - JLH Headphone Amplifiers) is 5k input pot. Its value is because of gain of the input transistors (mentioned in the articleś. But I have used input transistors with 4 time much higher hfe, so can I use bigger resistor (10k shown) instead of the original 5k one to lower the input coupling cap? If so, how much big can I go? 22k or even 47k?

Thank you.
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File Type: gif JLH Headphone PP.gif (10.2 KB, 215 views)

Last edited by kacernator; 9th June 2011 at 01:36 PM.
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Old 10th June 2011, 08:48 AM   #2
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Moderator, please delete this thread. Thank you.
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