This thread is a assembly discussing of industry gainclone.hope it is helpful to everyone.
The project describing:
http://home.swipnet.se/~w-50719/hifi/qrp02/index.html
http://www.diyaudio.com/forums/showthread.php?s=&threadid=37434
No doubt,the design of P-A is AMAZING!
ZANG
The project describing:
http://home.swipnet.se/~w-50719/hifi/qrp02/index.html
http://www.diyaudio.com/forums/showthread.php?s=&threadid=37434
No doubt,the design of P-A is AMAZING!
ZANG
What I made is an integrated amp.I use one 240VA 2 X 22VAC toriod, for power supply.
the attached drawing show the psu connections.
P.S.
I have collected almost all parts.but the sop-4 3-t packaged lm317/337 can not be find at my home town.who knows where to buy these two components?
the attached drawing show the psu connections.
P.S.
I have collected almost all parts.but the sop-4 3-t packaged lm317/337 can not be find at my home town.who knows where to buy these two components?
Attachments
I wish you good luck with the grounding becasue the pcb is made for one transformer per pcb. If you succeed to make a silent and humfree amp you have succeeded.
peranders said:
Just like designing an amplifier, grounding is also an art form.
Some people fight with it forever, some get it with minimal fuss.
🙂
The thing was that I designed this board for one transformer each just because of the grounding problems people have with other designs.
If you only connect one transformer per pcb you will get a hum/thump/click free amp! 🙂 The grounding is ready and you don't have to think about this.
If you only connect one transformer per pcb you will get a hum/thump/click free amp! 🙂 The grounding is ready and you don't have to think about this.
Digi01:[/i][b] Beijing is wind today said:
Don't know if you want to go that far, but Digi-Key in America seems to have them. This is the LM 317 in the sop 4 3 term package.
Part # 296-12631-1-ND
American Page:
http://rocky.digikey.com/scripts/ProductInfo.dll?Site=US&V=296&M=LM317MDCYR
Digi-Key Japanese Distributor Home Page:
http://dkc1.digikey.com/jp/digihome.html
Hope this helps. 🙂
The wind in Beijing is not terrible,but it come with sand.Originally I planned to do shopping with my girlfriend.because of the wind,we have to stay home do own thing liked😀
thank you for your informations,I will check them.
ZANG
thank you for your informations,I will check them.
ZANG
My gainclone was already playing music for some time. NO click/ thump during power on/off and specially no hum. 🙂
During testing of the first pcb, the voltage at the speaker output, it reads 36V. But after replacing the LM3886, the voltage becomes 0V, I mean 0mV.
As of now, I am using a 22k volume as a passive pre-amp between the cd player and amplifier. The sound is very natural and relaxing. I can listen to it continously the whole day.
I have the AKSA amplifiers driving the Linkwitz Orion speakers, sometimes I compare one of the 55W Aksa with the gainclone. The 55W Aksa is higher is power compared to the gainclone( by applying the same signal from the test cd supplied by Mr. Linkwitz, the Aksa 55W is 2x). The Aksa is slightly better in terms of high, mid, and bass but sometimes, I feel that it is a bit bright.
I am going to built an 8 channel gainclone to try to my Linkwitz Orion speaker. I am thingking of a "module" LM3886 approach.
During testing of the first pcb, the voltage at the speaker output, it reads 36V. But after replacing the LM3886, the voltage becomes 0V, I mean 0mV.
As of now, I am using a 22k volume as a passive pre-amp between the cd player and amplifier. The sound is very natural and relaxing. I can listen to it continously the whole day.
I have the AKSA amplifiers driving the Linkwitz Orion speakers, sometimes I compare one of the 55W Aksa with the gainclone. The 55W Aksa is higher is power compared to the gainclone( by applying the same signal from the test cd supplied by Mr. Linkwitz, the Aksa 55W is 2x). The Aksa is slightly better in terms of high, mid, and bass but sometimes, I feel that it is a bit bright.
I am going to built an 8 channel gainclone to try to my Linkwitz Orion speaker. I am thingking of a "module" LM3886 approach.
Enrico, the gain is not so high. I have chosen to have the gain enough for 0.7-1 V signal. This for not to get to much noise from the signal sources but it's very easy to increase the gain. This will be done by changing one resistor in the feedback of the input buffer.
One more thing: Be careful with your input connectors. You can tear away the copper pretty easy with your arrangement.
One more thing: Be careful with your input connectors. You can tear away the copper pretty easy with your arrangement.
Here's mine.
I just finished them. The chassis is made of an aluminum square beam (hollow in the middle) 1/4in thickness. The sides are 1/2in thick. I cut the squares 12 3/4in wide, and cut the bottom out to install the components.
My transformers are hand wound (by me!) and they provide 2 secondaries of 25.75vac and a 6v for a diode and led. I installed the red leds in an antique light housing.
All power wires are solid copper, signal wires are cat6.
I just finished them. The chassis is made of an aluminum square beam (hollow in the middle) 1/4in thickness. The sides are 1/2in thick. I cut the squares 12 3/4in wide, and cut the bottom out to install the components.
My transformers are hand wound (by me!) and they provide 2 secondaries of 25.75vac and a 6v for a diode and led. I installed the red leds in an antique light housing.
All power wires are solid copper, signal wires are cat6.
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