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Universal Volume Control Application and Instructions

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Universal Volume Control Application and Instructions

for DIY and assembled units 

8/13/2009 


Contents:
The Audio Matrix PCB
The Control Matrix PCB
1.1 Mounting the Control Matrix
1.2 – Power Supply Wiring
1.3 – Connecting the Ribbon Cables
3.11 – Connecting the Direct Output to RCA Output Connectors
3.12 – Connecting the Direct Output to an active Linestage
3.2 – Connecting the Buffered Output
The RC-5 Remote Control Protocol
Features, Technical Data and Application Examples
–Features
Specifications
–Passive operation standard mode
–Passive operation 100k shunt mode (option)
–Passive operation all modes
–Audio module with LSK389 buffers fitted
Application Examples
The UVC based 2 Channel buffered passive Linestage
The UVC/UTS based 2 Channel active Linestage
Backplate Mounting of Power Switch
Optional Side Plate Mounting of power Switch
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LSK389-A JFET for Ultimate Volume Control System (pair)

LSK389-A JFET for Ultimate Volume Control System (pair)

Price: $30.00 (Pair)

These JFET are specially selected for our Ultimate Volume Control System. Grade A LSK389, loss range is only 2.6 to 6.5mA.

 

Function in Ultimate Volume Control System

Install them in the positions as provided on the Audio PCB to create a standalone Remote volume/selector system linestage with 50 ohm output impedance.

Install the system in a suitable box and ‘drive away’.

 

Click link below to view:

Drill Template

Installation Manual

For other shipping options, Check our Website by clicking the icon below:

Store

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Audio Board for Ultimate Volume Control (Op-amp free!)

Audio Board for Ultimate Volume Control

Price: $175.00

This Preamplifier Control System uses an electronic potentiometer as used in all current Audio Research Preamplifiers, unlike other common volume control chips this device does not contain a build in op-amp. The Preamplifier Control System consists of two PCBs: Audio PCB: 1. 2 channels 2. 5-way input switching, and 3. Volume control, can be configured as mono balanced or stereo single ended Features: 127 step volume control from -52dB to 0dB attenuation with 12 LED level indicators 5 Inputs with LED indicators Remote control via universal remote control (RC5 code) Options for shunt operation (-46dB to -3dB or -52dB to -6dB or -66db to -15db) 5 way Silver alloy relay input switching LED’s driven on/off, not “multiplexed” to remove digital noise Audio PCB includes option for fitting two LSK389B Zero FeedBack J-Fet buffer (direct coupled – no coupling capacitors) to make a stand alone buffered passive preamplifier with <50Ohm Output Impedance must be used together with a controller and ps.

Showcases:

Wedding Bells at DIYHFS

When is Ultimate Ever EZ?

Click link below to view:

Drill Template

Installation Manual

For other shipping options, Check our Website by clicking the icon below:

Store

online store

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Controller Board for Ultimate Volume Control System (op-amp free!)

Controller Board for Ultimate Volume Control System

Price: $95.00

Control PCB: 1. ALPS rotary encoders 2. LED indication of input & volume, and 3. Power-supplies and microprocessor control Features: Control PCB delivered as one PCB but allows “break-off” of the rotary encoder & LED parts (connection via 20-Pin IDC cables (supplied) Control PCB can control up to 3 Audio PCB’s (6 channels single ended or 3 channels balanced); with optional transformer can control up to 8 Audio PCB’s (16 channels single ended or 8 channels balanced) Control PCB connects to Audio PCB via 20-Pin IDC cables (supplied) Power Supply using schottky diodes and low noise regulators Torroidal mains transformer with 115/230V Primary capable of supporting 3 Audio PCB’s with buffer fitted included Mains transformer with 115/230V Primary capable of supporting 3 Audio PCB’s with buffer fitted included Gold plated, 70 micron Copper PCB’s

Showcases:

Click link below to view:

Drill Template

Installation Manual

For other shipping options, Check our Website by clicking the icon below:

Store

online store

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CSS Manual

 

CSS

  1. The indicated trace is cut and resistor placed across it to prevent oscillation. Resistor from 1K to 5K is acceptable
  2. Connect B+ as shown, or optionally a 1ohm resistor can be connected from that trace to the trace labelled B+. In that case B+ connects to the labelled B+
  3. Connect anode as shown to reduce possibility of oscillation. Keep all leads short.
  4. Adjustable pot is 2K and can adjust the CCS from 2 to 100ma. Note: higher current requires heat sinking. Recommended to install to chassis with hardware provided and as shown. Note: the back of the IXYS is conductive and must be insulated from the chassis.
  5. Be careful: shorting the IXYS CCS will damage the 10S45M. There is no warranty for that.
  6. For referemce: the B+ voltage less the anode voltage below the CCS is the voltage available for signal swing. Ie 400V B+ – 200V anode = 200v so +-100v signal.