Balanced Audio Technology VK-33 Manuel utilisateur

VK-33

WARRANTY REGISTRATION FORM

Unit Serial Number:

_______________________________________

Customer Name:

_______________________________________

Address:

_______________________________________

Date of Purchase:

_______________________________________

Purchased From:

Dealer Name:

_______________________________________

Address:

_______________________________________

IMPORTANT NOTE:

In order to receive the full five year product warranty, please

mail this completed form together with a copy of your sales

receipt to Balanced Audio Technology at the address below,

within thirty days of purchase.

Failure to do so will result in the product being warrantied for

one year from the date of manufacture.

1300 First Stat Blvd. Suite A Wilmington DE 19804 Tel: 302-999-8855 Fax: 302-999-

8818

VK-33

Vacuum Tube

Balanced Stereo Preamplifier

Owner's Manual

1300 First Stat Blvd. Suite A Wilmington DE 19804 Tel: 302-999-8855 Fax: 302-999-

8818

TABLE OF CONTENT

INTRODUCTION 4

Package Content 4

Physical Placement 5

Connecting to your system 5

FRONT PANEL CONTROLS 6

VK-33 Power On sequence 6

Turning the VK-33 Off 6

PHASE Button and LED 7

MONO button and LED 7

MUTE button and LED 7

INPUT selection 7

VOLUME knob 7

DISPLAY format 8

FUCTION button 8

DISPLAY Brightness function 9

MUTE function 9

VK-33 PROGRAMMABLE FUNCTIONS 10

Parameter Definitions 11

PROGRAMMING THE VK-33 11

BALANCE adjustment 11

VOLUME offsets 12

PHASE 13

MONO/STEREO 13

MAXIMUM gain 13

FIXED gain 14

DISPLAY MODE 14

INPUT NAME 15

REMOTE CONTROL FUNCTIONS 16

Volume Up/Down 16

Mute 16

Fade 16

Input 17

Display/Power 17

Fuse Protection 17

Servicing 17

Cleaning 17

RESETTING VK-33 18

Warranty 19

INTRODUCTION

Thank you for your purchase of the Balanced Audio Technology VK-33

preamplifier. Please read this owner's manual to obtain the full benefit of the

VK-33 in your system. It will provide you with the needed safety information

and operating procedures for this exceptional unit.

WARNINGS:

To prevent the possibility of serious injury, electrical shock or fire:

DO NOT operate with the cover removed.

DO NOT expose to rain or moisture.

DO NOT defeat the ground power-plug.

DO NOT replace fuse with anything other than the same type and rating as supplied

by the factory.

Package Contents

Included in the box should be the following:

Description Quantity

VK-33 Preamplifier 1

Power Cord 1

Spare Fuse 1

Torx Wrench (T-15) 1

Spare Top Cover Screws 5

User’s Manual 1

VK-R3 Remote Control (If ordered)

Save all the packaging material in a safe dry area for the unlikely event that

you need to return the VK-33 to the factory for service.

PHYSICAL PLACEMENT

It is recommended that you provide at least 6" of free space around the unit for

proper ventilation.

Mount the unit on a hard surface with proper ventilation underneath.

Do not stack the VK-33 preamplifier on top of other units, nor vice versa.

CONNECTING THE VK-33 TO YOUR SYSTEM

Balanced Components

Use balanced XLR interconnects. All input and output connectors are clearly

marked on the back panel.

Note: The VK-33 XLR connectors are wired as follows:

Pin 1: common/shield

Pin 2: positive

Pin 3: negative

For the VK-33, use the Main 1 XLR Output for connection to your balanced power

amplifier. The Output 2 is configured as an RCA connector output.

Single-Ended Components

Single-ended components have RCA connectors. The VK-33 preamplifier is

designed to work with mix of single-ended and balanced components connected

to its inputs and outputs. If more single ended components need to be

connected to the preamplifer, then the XLR inputs or outputs can be used for

that in conjunction with RCA/XLR adapters. These adapters are available from an

authorized Balanced Audio Technology dealer at a nominal charge.

Two types of adapters are available:

Input Adapters: RCA Female to XLR Male

Output Adapters: RCA Female to XLR Female.

VK-33 FRONT PANEL CONTROLS

STANDBY Button and LED

The Standby button is used to turn the unit ON and OFF and to switch the

preamplifier into its Standby mode. The LED indicates the status of the unit’s

power circuitry and has four state:

LED OFF Display OFF Unit is in OFF state

Display ON Unit is in ON state

LED Flashing Unit is going through its Power-ON routine

LED ON Unit is in its STANDBY mode

When the unit is plugged into a power line, it will stay in the OFF state until the

Standby button is pushed. The LED will then start blinking and the unit will go

through a 50second warm-up sequence. At the end of that sequence it will turn

ON.

Pressing the button again will switch the unit into its Standby mode.

The VK-33 can be turned OFF by

pressing and holding

the Standby button.

VK-33 Power-On sequence:

When you turn the VK-33 On, it will automatically go through a gentle power-on

sequence. This sequence takes 50 seconds, during which time the display and

the Standby LED will be flashing, indicating the status of the unit.

1. The number on the display during this time indicates the volume setting.

This will usually start at 000. This setting can be changed during this time

by using the volume knob or Volume Up/Down buttons on your VK-R3

remote control transmitter. In addition, such functions as Phase, Mono,

input selection and Mute can be changed during this time either from front

panel or through the remote control.

2. Normally the VK-33 will be

not muted

(Mute LED on the display is OFF) and

will begin playing at the end of the 50 second delay. If so desired, the unit

can be put in the MUTE mode during this delay interval either by depressing

the front panel MUTE switch or by using the MUTE button on the VK-R3

remote control transmitter.

Turning the VK-33 Off:

The unit can be turned OFF by

pressing and holding

the Standby button. It will

automatically mute.

PHASE button and LED

This button allows the user to invert the absolute polarity of the signal to

compensate for some recordings that are made out-of-phase. The LED indicates

whether the unit is in its INVERTING or NONINVERTING mode. This function is also

accessible via the VK-R3 remote control.

LED OFF Non Inverting operation

LED ON Inverting operation

MONO Button and LED

The Mono button allows the user to switch the VK-33 in Mono operation when the

two channels are summed together. This may be useful, for example, while

listening to old monophonic recordings. This function is also accessible via the VK-

R3 remote control.

LED OFF Stereo operation

LED ON Mono operation

MUTE Button and LED

The Mute button disables the preamplifier output. It is recommended that the

Mute be engaged any time the signal cables are changed or any other system

configuration changes are being made. This function is also accessible via the VK-

R3 remote control.

LED OFF Unit in Play mode

LED ON Output Muted

INPUT selection buttons 1through 5

These allow the user to select any of five available inputs to be played. The

selected input number together with its name will be indicated on the unit front

panel display as well. This function is also accessible via the VK-R3 remote

control.

VOLUME Knob

This knob performs different function depending upon the unit’s mode of

operation. In normal mode it works as volume control knob.

It is also used as a data input device in various Function modes to program the

unit. For example, it is used to set the BALANCE adjustment when the VK-33 is

switched into its Balance mode. More on that in the corresponding sections of

this manual.

The volume control knob on the VK-33 is linked to a digital encoder and is of a

continuously rotating type (there are no stops).

DISPLAY FORMAT:

The VK-33 Vacuum Fluorescent Display (VFD) is capable of showing up to twelve

alphanumeric characters. Its format depends on the mode of operation. In the

normal PLAY mode the display has the following format:

1. One character indicating the selected input number.

2. Four-character input name. That name is fully programmable (See the

programming functions) and can include up to four character from the

Latin, Cyrillic or Greek alphabets or digits.

3. Balance adjustment indicator. Characters L or R indicate that the balance is

shifted in the corresponding direction. A BLANK character means that the

gains of both channels are identical.

4. Volume setting - three digits with the full range of 000 to 140 (See

programming section on Maximum Volume Setting)

FUNCTION Button

This button puts the unit in its programming mode. In addition to its normal PLAY

mode, there are eight programmable functions in the VK-33:

BALANCE Adjustment

RELATIVE VOLUME setting

PHASE setting

MONO/STEREO setting

MAXIMUM volume setting

FIXED volume setting

DISPLAY (Volume) mode

INPUT NAME assignment

Pressing this button while in PLAY mode will switch the unit into programming

mode. Once in the programming mode, pressing the Function button will switch

the unit into its NEXT programmable functions. The unit will stay in the

programming mode until the exit command is issued. To EXIT the programming

mode at any time,

press and hold

the Function button for about TWO seconds.

DISPLAY Brightness Function

Changing the Display Brightness: The VK-33 display can be dimmed

or turned completely OFF by simply pressing the DISPLAY button on your

VK-R3 remote control transmitter.

Each press will reduce the brightness of display and LED indicators in steps

from full ON to OFF, and then one press back to full ON. The LED indicators

will dim but never turn completely OFF. With the display OFF, issuing any

remote control command that would normally require a display change (i.e.:

Volume, Input selection, Fade) will automatically turn the display back ON.

MUTE Function:

The VK-33 has two mute modes: manual and automatic. The blue LED above the

Mute button goes ON when the unit is in MUTE state. To MUTE the VK-33,

depress the MUTE button located on the right side of the front panel. Depressing

this button again will return the unit to its normal operation and turn the mute

LED off.

When the unit is powered up it automatically self-mutes until the proper operating

points of the circuitry are reached. It will then automatically go into Play mode,

provided the Mute function was not activated (the blue Mute LED is Off).

Turning the VK-33 OFF even for short time, will make the unit reset its power

sequencing circuit and mute its output.

It will then require 50 seconds for the

unit to become operational again.

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