Audio Valve Avalon Manual de usuario

INSTRUCTION

manual

for

AVALON

PPP - MONO POWER AMPLIFIER

_____________________________________

This handcrafted product was special made for your high demands,

to display the music on ist finest way.

We guarantee,that this amplifier was carefully produced

and tested in all details.

_____________________________________________________________________

Congratulations on your decision to become the proud owner of the

AUDIO-VALVE AVALON 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 AVALON

should provide trouble free performance.

Please take time to read this manual

thoroughly before using your amplifier.

List of contents

- Warning and precautions page 3

- Front panel - rear panel page 4

- Drawing front panel page 4 a

- Drawing rear panel page 4 b

- Input - output terminals page 5

- Polarity - phasing page 5

- Installation and operation page 6

- Automatic bias control ( ABR ) page 7

- Specifications page 8

WARNING

This amplifier AVALON operates in class - A and is

therefore capable of generating a moderately high temperatue

which requires carefull 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 referered 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 circut, earth / ground

or appliance (other than suitable HiFi quality loudspeakers )

to any output terminal.

Some preamplifiers, prossesors, 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 and operate the

Stand - by mode of the amplifier before turning on the Challenger.

Note: the AVALON power amplifier do not cause this problem.

FRONTPANEL

The front panel of the AVALON 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 LED immediatly beside the

switch illuminates to indicate that the power is ON.

This amplifier draws o 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 LED is off).

REAR PANEL

The facilities on the rear panel of the AVALON may

seem not so complex. The rear panel incorporates all

of the terminals for connecting the input signals and

the output signals to the loadspeaker. 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 AUDIO VALVE AVALON

power amplifier is a high quality electronic instrument

capable of an exeptioneal level of performance.

Be sure that you understanding your requirements fully

before you make any connection to this amplifier.

INPUT TERMINALS

Input terminals for this AVALON power amplifier are easily

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

RCA INPUT. These standart type of RCA terminals are for

use with unbalanced signals from most signal sources such as

audio preamplifiers.

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 postes for each cannel are supplied.

CONNECT your loudspeaker positive terminal to the

amplifier (+) output terminal. Connect your loudspeaker

negative terminal to the ( - ) output terminal.

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 Audio Valve dealer for advice.

Do not make any other connection to any of the amplifiers

negative or positive output terminals.

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.

RCA

Mainplug

Fuse

8 ohm

4 ohm

Speaker

INSTALLATION AND OPERATION

MAINS VOLTAGE

CHECK 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 AUDIO VALVE dealer.

PLACEMENT AND VENTILATION

This Audio Valve AVALON 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 standart IEC 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.

Ensure 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 IEC 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 6.3 ampere slow blow.

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

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

the fuse with one of the same type.

DO NOT FIT A FUSE WITH HIGHER RATING.

HALF AUTOMATIC BIAS CONTROL FUNCTION

Each power tube is controlled by plate current.

The correct function of the power tubes is shown by 1 LEDs,

next to each power tube.

When the amplifier is operating, no LED is shinning.

In case that any of the power tubes is faulty the LED,

which are together at the side of the power tubes ,

immidiatly indicated.

If this happens, you have to change the power tube of this place.

After changing the power tube, the LED must be off again.

Please notice:

All handling at the open amplifier has to be done

when the main power plug is disconnected .

When the amplifier is driven in a very high level output,

there is a slighty shinning of the LEDs.

AVALON - SPECIFICATIONS:

prinzip: Parallel-push-pull power amp

tubes: 1*12AU7, 1*12AX7, 8*beam power pentode

for example: EL 84

operate: class - A

power output: 60 Watt

power consumption: 160 Watt - Stand by mode - 30 Watt

max. short circuit

current: 15 ampere between 2 ohm terminals

input sen. 0 dBm (adjustable by resistor trimmer)

input imp. 1 * 47K

output imp: 2-4-8 ohm

connectors: RCA input-jacket

power bandwide: 5-40.000 hz

distortion: 0,3% - 50 Watt (8 ohm load)

damping: 40

bias: half autom. ,with LED shinning by bad power tube

size: 32*220*20 cm, D-H-W

weight: 22 pounds

Stand-by mode: switchable

W A R R A N T Y

AUDIO VALVE warrants its components for a three-year period on all

electronics and a 90-day period on the tubes from the purchase date.

In the event of a failure of your amplifier , AUDIO VALVE will repair or

readjust this unit or , should the occasion arise , will replace it provided that all

conditions stipulated in this warranty are met.

In order to initiate service of any kind it is necessary to obtain distributor or

dealer authorization prior to shipping the unit for service.

Any of the following conditions shall void the warranty:

•Operation not in accordance with this manual.

•Abuse , accidental damage or unauthorized modifications , as determined by

AUDIO VALVE or its agents exclusively.

•Removal , defacing or falsifying of tne serial numbers.

•Shipping without the original complete factory crates.

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