Audio Valve BALDUR 300 Manuel utilisateur

INSTRUCTION

BALDUR 300

High Power, high current class -a triode amplifier

This handcrafted product was special made for your high

demands,

to display the music on its finest way.

We guarantee, that this amplifier was carefully produced

and tested in all details.

BALDUR 300 triode power amplifier

Congratulations on your decision to become the proud owner of the AUDIO-

VALV Baldur 300 power amplifier.

This manual has been prepared to help you understand the operation of your

amplifier and to provide some information about its design and the variety of

ways it may be used.

We have designed and manufactured this amplifier to faithfully and accurately

reproduce music. This hand build instrument should give a lifetime of pleasure

and with a little care and a full understanding of the operation recommendation

in this manual the Baldur 300 should provide trouble free performance.

Please take time to read this manual

thoroughly before using your amplifier.

There should be two persons grabbing the outer rim of plexiglas

top to lift up, rest on edge of crate then continue all lifting

from the bottom of the chassis.

List of contents

- Warning and precautions

- Front panel - rear panel

- Drawing front panel

- Drawing rear panel

- Input - output terminals

- Polarity - phasing

- Installation and operation

- Automatic bias control ( ABR )

- Specifications

BALDUR 300 triode power amplifier

WARNING

This amplifier Baldur 300 operates in class - A and is

therefore capable of generating a moderately high temperature which

requires care full placing to aviod any effect this heat may have on other

equipment, funiture and fittings etc.

Do not remove the top cover from this amplifier.

Hazardous voltages are present. Any repair work should

be refer to a suitable qualified and experienced

service person.

Do not attempt to connect any input of this amplifier to

any of its outputs.

Do not earth any output terminal or connect any of these

terminals together without following the instructions in

this manual or seeking qualified assistance.

Do not place this amplifier in any position where liquids

or any foreign material may accidentally enter it.

Do not disconnect any in / output wire, while the amplifier is

operating.

Do not connect any voltage source short circuit, earth / ground or

appliance (other than suitable HiFi quality loudspeakers ) to any output

terminal.

Some preamplifiers, processor, CD players etc produce

large switching pulses when switched on, causing a loud

click through the loudspeakers. For this reason, turn on

all other equipment in your system before turning on the

Baldur 300.

Note: the Baldur 300 power amplifier do not cause this problem.

BALDUR 300 triode power amplifier

FRONTPANEL

The front panel of the Baldur 300 power amplifier

incorporates with a small panel filled with two switches.

These switches control the day to day function of the amplifier.

The operation of this two switches is like following:

MAIN SWITCH

This heavy duty rocker switch is at the right side

of this panel and switched the mains / line power of the

amplifier On or OFF. A blue L D immediatly beside the

switch illuminates to indicate that the power is ON.

This amplifier draws to moderate high current when

switched on. It is not good practice to repeatedly

active this switch ON and OFF rapidly.

STAND - BY SWITCH.

This switch on the left of the panel alters the operation

STAND BY of the amplifier. Switch down is operation

STAND BY , ( the left blue L D is off).

BALDUR 300 triode power amplifier

POWER

OPERATE

Please read the following safety notes:

Please notice that you never exceed the mains voltage in the prescribed

value shown at the lable of the serial number on the rear side. If you

can`t provide the amplifier with the exact shown main voltage, please use

a voltage stabilizer - particulare for the U A.

The amplifier needs a certain time to form the brand new

components (capacitors) otherwise they can be destroyed.

For the on and off mode of the amplifier please do only use the main

switch, the operate switch is currently in on position. ( LED is lightining)

Use the tand - By mode (OPERATE - off) only for short periodes, max. 1

hrs. During long periodes switch the equipment off completely.

Do not leave your house with switched on equipment, or during sleeping

time.

Please only do use your amplifier while listening to music.

BALDUR 300 triode power amplifier

REAR PANEL

The facilities on the rear panel of the Baldur 300 may

seem not so complex. The rear panel incorporates all

of the terminals for connecting the input signals and

the output signals to the loudspeaker. A reasonable

understanding of this amplifier and the logical approach

should ensure that you are listening to this amplifier in a

very short space of time without any difficults at all.

Please remember that the AUDIOVALV Baldur 300

power amplifier is a high quality electronic instrument

capable of an exeptional level of performence.

Be sure that you understanding your requirements fully

before you make any connection to this amplifier.

BALDUR 300 triode power amplifier

Main Power

S p e a ke r

RCA

XLR

8 ohm

4 ohm

H a n d c ra fte d b y A ud io Va v e - Ge rm a ny

C A U T IO N : D i s c o n n e c t m a i n p o w e r b e fo r s e rv i c i n g !

Model:

er.-No.:

Voltage:

Power consumption:

Fuse:

BALDUR 300

Fuse

INPUT TERMINALS

Input terminals for this Baldur 300 power amplifier are easily

accsessible and fitted to the lower centre area of the rear panel.

RCA INPUT. These standard type of RCA terminals are for

use with unbalanced signals from most signal sources such as

audio preamplifiers.

fake XLR BALANCED INPUT. XLR connector fitted to

the amplifier are for use with balanced line signals from

audio pre amplifiers etc. Balanced signals are carried

via a three way cable that connects all three pins at each

of the interconnect cable.

DO NOT operate this amplifier with both RCA and XLR

cables connect at the same time.

BALDUR 300 triode power amplifier

OUTPUT TERMINALS

Output connections for the Loudspeakers are provided on the

lower centre of the rear panel. Two pairs of heavy duty

gold plated binding posts for each cannel are supplied.

CONNECT your loudspeaker positive terminal to the

amplifier (+) output terminal. Connect your loudspeaker

negative terminal to the ( - ) output terminal.

+++ importend note for speaker terminal connection +++

please use the 4 ohm terminals for speakers with an impedance from

2 - 6 ohm, and use the 8 ohm terminals for speakers impedances

between 6 – 12 ohm and higher.

POLARITY - PHASING

It is important to achieve good stereo imaging in your

listening room. By observing the wiring constructions

above, each power amplifier / loudspeaker combination

should be in phase. If you experience a poor stereo

image and / or a lack of bass, check that the loudspeaker

wiring has been connect correctly. We recommend that

you use one of the easily obtainable "test - disc" to help

you ensure both phasing and channel orientation are correct.

If in doupt, consult your AudioValve dealer for advice.

Do not make any other connection to any of the amplifiers

negative or positive output terminals. Only the minus terminal from

the 8 ohm terminals has ground polarity, all the other has life signal

phase

Quality of the connections must be examined to ensure a high

performence trouble free operation is enjoyed. Check that the

connections are tight, but do not overtighten with exessive use of

spanners etc. If bare wires are used, make sure that no loose strands of

wire short across to the other terminals or the amplifier chassis. When

using plugs such as Banana, be sure to use good quality one`s with a firm

fit.

BALDUR 300 triode power amplifier

INSTALLATION AND OPERATION

MAINS VOLTAGE

CH CK that the mains voltage printed on the rear of this

amplifier is similar to the mains voltage normaly supplied to

your area. If indoupt, please consult your AUDIOVALV dealer.

PLACEMENT AND VENTILATION

This AudioValve Baldur 300 power amplifier is designed to

operate at a moderately high temperature. The ideal location

is on the rigid stand or floor mounted away from direct contact with any

objects, materials or deep pile carpets which may be effected by the heat

or which may interrupt the flow of air around the amplifier.

When operating the amplifiers quite a lot of heat is generated which

should be allowed to dissipate without restriction. Make sure that no

objects are placed on the top of the amplifier. Always ensure adequate

ventilations.

MAINS / LINE POWER connection is via supplied plug-in lead. The

standard I C socket connects the mains power at the amplifier end while a

local mains plug is required at the wall end. In the event where a "local"

plug needs to be fitted to the wall end of the lead, ensure the at the plugs

is wired correctly by a suitable qualified or experienced person.

nsure the main switch of the front of this amplifier is OFF before

attempting any modification of the mains connection.

MAINS / LINE FUSE

A Mains / Line fuse is fitted within the I C Mains / Line socket on the

rear of the amplifier. A small draw at the bottom of this socket may be

removed (after the IEC plug is removed) by levering it out with a flat

blade screw driver. The fuse fitted should be razed at no greater than 10

ampere slow blow.

In the unusual event that this fuse should blow, you must first

establish the cause of this failure, cure the fault and then replace the

fuse with one of the same type.

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