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-   -   ★★Free JLH Hifi Headphone Amp PCB, 0.008% THD★★ (https://www.diyaudio.com/forums/siliconray-online-electronics-store/202614-free-jlh-hifi-headphone-amp-pcb-0-008-thd.html)

siliconray 16th December 2011 09:37 AM

★★Free JLH Hifi Headphone Amp PCB, 0.008% THD★★
 
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!

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gervenja 16th December 2011 09:51 AM

Hello Siliconray,

I would love to receive a pair of boards.
Please let me know what to do.

best regards John

siliconray 16th December 2011 09:56 AM

Hello Hohn

just click the link at the beginning of the post to "order" it. price is $0.01/pc because the system do not allow 0. What you need to pay is only shipping cost from China to your country.

andee1310 16th December 2011 11:36 AM

If I want to connect it to headphone can I connected to one pcb or two pcb of this JLH Hifi Headphone Amp....?

siliconray 16th December 2011 02:08 PM

Hi Andee1310:

You can see from the photo there're 2 transistor one one board, that means one channel per board. You need 2 pcb to make a stereo. A 6.3mm headphone connector is comes with every 2 kit.

siliconray 28th December 2011 08:08 AM

Hello we developed a nice power supply for this headphone amplifier kit. Please see the details here:
Power supply for JLH headphone amplifier

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dillmeister 6th January 2012 01:21 AM

Thanks Siliconray, I got my boards in record time and they look great. Not sure how fast I will populate them and see how they work but I am impressed with your quick response and packaging. ( :

siliconray 6th January 2012 08:45 AM

Great...looking forward to see your finished boards and testing result. Don't forget to adjust the static output voltage to 0 before connect headphone

gervenja 6th January 2012 11:37 AM

Received my boards from the post office today, they have been there for over a week.
Very nice boards, very fast shipping.
Thanks John

RS232 22nd January 2012 06:20 PM

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


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