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New project : R-2R Attenuator With Remote Control V2
New project : R-2R Attenuator With Remote Control V2
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Old 16th March 2009, 01:48 AM   #111
bbp is offline bbp  China
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the second pic
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Old 16th March 2009, 01:50 AM   #112
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3rd
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Old 16th March 2009, 01:52 AM   #113
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4th
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Old 16th March 2009, 03:46 AM   #114
joshuajoshua is offline joshuajoshua  United States
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Hi Lu,

Thanks for the info about the kit and detail pictures....

Joshua
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Old 16th March 2009, 10:21 AM   #115
adamus is offline adamus  United Kingdom
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Lu, finished the build. Its a good product.

I used a buffer after the vol control to lower the output resistance.

Click the image to open in full size.
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Old 16th March 2009, 11:58 AM   #116
SimontY is offline SimontY  United Kingdom
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Veeery nice looking build, and I bet good-sounding too.

Simon
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Old 16th March 2009, 12:19 PM   #117
adamus is offline adamus  United Kingdom
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cheers, sounds great and works as expected. I used pedja rogic buffers (2sk170). Sounds supremely transparant. No popping or anything when changing vol.
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Old 16th March 2009, 01:02 PM   #118
joshuajoshua is offline joshuajoshua  United States
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Quote:
Originally posted by adamus
cheers, sounds great and works as expected. I used pedja rogic buffers (2sk170). Sounds supremely transparant. No popping or anything when changing vol.

Very professional looking....

BTW, I plan to use pedja buffer as well, could you post the schematic that you use? Like do you put 1M resistor from 2sk170 gate to the ground? series R at the input?

Joshua
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Old 16th March 2009, 01:52 PM   #119
SimontY is offline SimontY  United Kingdom
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I use that buffer too, it's amazingly good. Good to know it works with this attenuator nicely!
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Old 16th March 2009, 01:54 PM   #120
adamus is offline adamus  United Kingdom
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yes, the 1m resistor is to ground, no series resistance, output goes through 4.7uf caps as the pedja buffer does present large dcoffset.
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