Keep on offering free audio PCBs..
Free JLH Headphone Amplifier Boards
This board is following JLH2005 design. Transistors used are: BC550, BC560 and MJE3055. Works excellent for 32, 120, 300 and 600 Ohm headphones. The THD is only 0.008%. Feel free to get 2 now, happy listenning!
Free JLH Headphone Amplifier Boards
This board is following JLH2005 design. Transistors used are: BC550, BC560 and MJE3055. Works excellent for 32, 120, 300 and 600 Ohm headphones. The THD is only 0.008%. Feel free to get 2 now, happy listenning!
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Hello we developed a nice power supply for this headphone amplifier kit. Please see the details here:
Power supply for JLH headphone amplifier
Power supply for JLH headphone amplifier
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Hello Serial Port
Sorry for missing the value of R10. 0.33 or 0.51 Ohm is OK.
I think no harm to use matched BC550/560, but I tried both matched/unmatched, I couldn't find difference by either instrument or my ears.
Sorry for missing the value of R10. 0.33 or 0.51 Ohm is OK.
I think no harm to use matched BC550/560, but I tried both matched/unmatched, I couldn't find difference by either instrument or my ears.
Thanks for the fast shipping
I have 2 questions
The first is the value of R10 ?
The second one is: do the BC550/560 need to be matched ?
Many thanks
Ric
Hi, one supply for 2 channels. one supply can source 4A without overheating. enough for 1.6A Iq per channel.
Hi Ray. Would I need one of your power supplies for both boards/channels, or one for each?
Hi,
just built the headphone amp, but I am getting oscillation at the output. I am using mje15030. Any ideas?
Also I see on your pictures that Q3 is positioned reverse from the marking of the silkscreen. Not so easy to see from the pictures. I do not think that the pcb has any mistakes, as far as I checked.
just built the headphone amp, but I am getting oscillation at the output. I am using mje15030. Any ideas?
Also I see on your pictures that Q3 is positioned reverse from the marking of the silkscreen. Not so easy to see from the pictures. I do not think that the pcb has any mistakes, as far as I checked.
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