tubehunter
27-02-2011, 11:16
Hi all,
I built this last year to use with some power amps I had built.
It is a nice change from a passive pot with good drive ability.
5mm clear Acrylic case with Beech sides.
Two pairs of RCA Phono inputs, another set could be added from board.
One pair RCA outputs.
Remote control and manual control on unit.
Info:
The PGA2311 is a high−performance, stereo audio
volume control designed for professional and high-end
consumer audio systems. Using high performance
operational amplifier stages internal to the PGA2311
yields low noise and distortion, while providing the
capability to drive 600Ω loads directly without buffering.
The heart of the PGA2311 is a resistor network, an analog
switch array, and a high−performance op amp
stage. The switches are used to select taps in the resistor
network that, in turn, determine the gain of the amplifier
stage. Switch selections are programmed using
a serial control port. The serial port allows connection
to a wide variety of host controllers.
FEATURES
*DIGITALLY-CONTROLLED ANALOG VOLUME
CONTROL
Two Independent Audio Channels
Serial Control Interface
Zero Crossing Detection
Mute Function
*WIDE GAIN AND ATTENUATION RANGE
+31.5dB to −95.5dB with 0.5dB Steps
*LOW NOISE AND DISTORTION
120dB Dynamic Range
0.0004% THD+N at 1kHz (U-Grade)
0.0002% THD+N at 1kHz (A-Grade)
*NOISE-FREE LEVEL TRANSITIONS
*LOW INTERCHANNEL CROSSTALK
−130dBFS
£100 including P&P
http://i514.photobucket.com/albums/t350/halx00/pre%20amp/IMG_5576.jpg
http://i514.photobucket.com/albums/t350/halx00/pre%20amp/IMG_5575.jpg
http://i514.photobucket.com/albums/t350/halx00/pre%20amp/IMG_5574.jpg
http://i514.photobucket.com/albums/t350/halx00/pre%20amp/IMG_5572.jpg
http://i514.photobucket.com/albums/t350/halx00/pre%20amp/IMG_5571.jpg
I built this last year to use with some power amps I had built.
It is a nice change from a passive pot with good drive ability.
5mm clear Acrylic case with Beech sides.
Two pairs of RCA Phono inputs, another set could be added from board.
One pair RCA outputs.
Remote control and manual control on unit.
Info:
The PGA2311 is a high−performance, stereo audio
volume control designed for professional and high-end
consumer audio systems. Using high performance
operational amplifier stages internal to the PGA2311
yields low noise and distortion, while providing the
capability to drive 600Ω loads directly without buffering.
The heart of the PGA2311 is a resistor network, an analog
switch array, and a high−performance op amp
stage. The switches are used to select taps in the resistor
network that, in turn, determine the gain of the amplifier
stage. Switch selections are programmed using
a serial control port. The serial port allows connection
to a wide variety of host controllers.
FEATURES
*DIGITALLY-CONTROLLED ANALOG VOLUME
CONTROL
Two Independent Audio Channels
Serial Control Interface
Zero Crossing Detection
Mute Function
*WIDE GAIN AND ATTENUATION RANGE
+31.5dB to −95.5dB with 0.5dB Steps
*LOW NOISE AND DISTORTION
120dB Dynamic Range
0.0004% THD+N at 1kHz (U-Grade)
0.0002% THD+N at 1kHz (A-Grade)
*NOISE-FREE LEVEL TRANSITIONS
*LOW INTERCHANNEL CROSSTALK
−130dBFS
£100 including P&P
http://i514.photobucket.com/albums/t350/halx00/pre%20amp/IMG_5576.jpg
http://i514.photobucket.com/albums/t350/halx00/pre%20amp/IMG_5575.jpg
http://i514.photobucket.com/albums/t350/halx00/pre%20amp/IMG_5574.jpg
http://i514.photobucket.com/albums/t350/halx00/pre%20amp/IMG_5572.jpg
http://i514.photobucket.com/albums/t350/halx00/pre%20amp/IMG_5571.jpg