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Old 14th August 2003, 01:53 PM   #1
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Wink Wicked Box (pics)

My first amp is gonna be here soon. The kind builder informed me that he would do his best to tweak it to my preferences. But am pretty new at this so would like to share it here.
Here's the porno:
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inside
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crossfeed
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Now the juice. Please feel free to post whatever opinions you have on this. One of the beauties of it is it's fully socketed. This includes the op-amp, buffers, and all the resistors (except the R10) including the crossfeed. Everything attached to the case is isolated.

Op-Amp - AD8620 (Biased into Class A)

Resistors - 1/8W 1% Vishays
R1 - 499
R2 - 499K
R3 - 475
R4 - 4.75K
R5 - 2.21K
R6 - 499K
R7 - 100
R8/R9 - Jumpered
R10 - 475

ZNR - 7.2V (Turns the LED off just below 10V)
CRD - 2.5mA

C1 - .47uF 50V Panasonic Polypropylene film & foil
C2/C3 - 1500uF 25V Nichicon UPW series
C4 - 6.8F 50V WIMA MKS-2
C5 - Open

The crossfeed's Vishay resistors and Panasonic capacitors sizes spec'd per Chu Moy's "High-Z" circuit.

Buffers - Elantec EL2001 (5 total)
Stacked output buffers

Volume Pot. - ALPS 50K

Power Supply:
Two 9V batteries in series (18V)
or
24V wall wart

Enclosure: Hammond 1455N1201BK

Thanks for looking!!!
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