Audio Note ANKORU/II Technisches Handbuch

ANKORU/II

MONO POWER AMPLIFIERS

OWNER’S INFORMATION

1) IMPORTANT SAFETY INFORMATION

2) CE DECLARATION OF CONFORMITY

DISPOSAL

POWER REQUIREMENTS

3) INTRODUCTION

4) OVERVIEW

UNPACKING AND INSTALLATION

5) VALVE INSTALLATION

8) CONNECTION

9) OPERATION

10) TECHNICAL SPECIFICATIONS

11) WARRANTY INFORMATION

12) CONTACT INFORMATION

CONTENTS

SUCH REPLACEMENT MUST ONLY BE CARRIED OUT BY A

QUALIFIED SERVICE TECHNICIAN.

Do not attempt to replace any fuses without first disconnecting the unit

from the mains electricity supply.

! IMPORTANT SAFETY INFORMATION !

RISK OF SHOCK OR ELECTROCUTION! INTERNAL OPERATING

VOLTAGES ARE LETHAL!

Do not remove top cover, unless specifically instructed to do so in the user

manual.

This unit contains fuses and other safety components in accordance with

BS60065 requirements.

In the event of failure, replacement fuse or safety component must be of

the same part type and value.

This product generates high levels of heat. Adequate ventilation must

be provided. Do not restrict airflow through any ventilation slots or

place the unit on any surface that may restrict airflow.

Valve equipment operates at extremely high temperatures;

KEEP OUT OF THE REACH OF CHILDREN AND ANIMALS.!

Do not store or operate this unit in areas of high humidity or in close

proximity to water / moisture.

Do not expose or immerse the unit in liquid of any kind.

This product must be earthed –ensure that the mains supply cable earth /

ground is correctly connected.

OTHER SAFETY PRECAUTIONS: -

Never touch the power cord with wet hands.

Always remove the power cord by grasping the plug, not the cable.

Never expose the unit to excessive heat or magnetism.

Never let an inexperienced person repair or reassemble the unit.

Never put anything, especially metal objects, inside the unit.

Never place excessive weight on the unit.

POWER REQUIREMENTS

Power requirements for electrical equipment vary depending on your geographical

location. Please ensure that your unit meets the power requirements in your area.

The power requirement for your unit is marked on the serial number plate, located on

the rear panel.

If you are in doubt, please contact your dealer before plugging the unit into the mains

supply.

CE DECLARATION OF CONFORMITY

DISPOSAL

This product must not be disposed of as normal household waste. To

prevent possible harm to the environment please separate the product

from other waste to ensure that it can be recycled in an environmentally

safe manner. Please contact your retailer or the appropriate local

government office for collection facilities.

We declare under our sole responsibility that this product is in conformity

with the following standards or standardized documents:

BS EN 60065 in accordance with the regulations 73/23/EEC, 89/336/EEC

(from 1 January 1997)

CE 94

Peter Qvortrup,

Director

Audio Note (UK) Limited

25 Montefiore Road

Hove

East Sussex

BN3 1RD

United Kingdom

Tel: +44 (0)1273 220 511

Fax: +44 (0)1273 731 498

Thank you for purchasing this Audio Note (UK) product. With the correct care it

should give you many years of pleasure and enjoyment.

Please take the time to read all of the information in this manual before connecting

your new component to an electrical supply or your system, to ensure both your

safety and satisfaction.

Please note that due to our desire to continually improve products, specifications are

subject to change without notice. Therefore it is important to refer to the manual that

is supplied with your product for the most accurate information; manuals downloaded

from our website or obtained from other sources may no longer fully apply to your

product.

If you have any questions regarding the information contained within this document

or your new component, please feel free to contact us: -

Audio Note (UK) Limited

25 Montefiore Road

Hove

East Sussex

BN3 1RD

United Kingdom

Tel: +44 (0)1273 220 511

Fax: +44 (0)1273 731 498

e-mail: [email protected]

INTRODUCTION

Congratulations on your purchase of the Audio Note (UK) ANKORU/II MONO power

amplifiers.

They are Pure Class A Parallel Singled Ended valve mono amplifiers, using a pair of

the highly regarded 211 triode valves per chassis, producing a level of performance

that is radically superior to the vast majority of current designs.

They use a similar circuit design and topology to the legendary Audio Note (UK)

GAKU-ON amplifiers. However, where the GAKU-ON power amplifiers use silver

wherever possible, such as for all transformer windings, the ANKORU/II instead use

copper.

They have been specifically engineered for sonic performance rather than technical

specification, and fulfill all Audio Note (UK) Level 3 criteria: -

Pure Class A operation

Zero Negative Feedback

Single Ended Output Stage

Valve Rectification

Directly Heated Triode operation

Materials and component quality

Please take care when unpacking your ANKORU/II MONO power amplifiers. Choose

a clean, clear location to unpack your unit. Be aware that the amplifiers are very

heavy; before attempting to unpack or lift the unit, check the weight and if necessary

use more than one person so that it can be moved safely and easily.

We recommend that you retain and carefully store all of the original packing

materials, in case transportation / shipping is required at a later date.

Select a suitable location for the units. This should be a dry, dust free and level area,

preferably shielded from direct sunlight and free from vibration. Also ensure that the

location is stable and capable of carrying the weight of the units.

A suitable mains power outlet must be close to the location; power cords must not be

pulled or stretched tightly in an attempt to reach a wall socket. If the power cord will

not easily reach the socket, choose a closer location!

Please ensure that adequate ventilation for the units is provided, and that airflow

through any ventilation slots in the units is not restricted. We recommend a distance

of at least 50cm free space is maintained above the units, and preferably they should

be sited in free space or on the top shelf of your equipment rack or table. Please also

remember that valve equipment operates at extremely high temperatures, so a

position that is inaccessible to any children or animals is essential.

ANKORU/II MONO POWER AMPLIFIERS

UNPACKING AND INSTALLATION

The amplifiers are shipped without the valves installed. It is necessary to install the

valves prior to operation.

It is essential that the valves are installed correctly or serious damage that is not

covered by the warranty will result. We recommend that your dealer perform

this procedure for you if you are in any way unsure.

FIRSTLY, ENSURE THAT THE AMPLIFIERS ARE NOT CONNECTED TO A MAINS

ELECTRICAL SUPPLY, AND THAT THE POWER CORDS ARE NOT CONNECTED

TO THE AMPLIFIERS.

Now remove the valves that are packed inside the amplifier boxes. Also inspect the

amplifiersto check that nothing has become damaged during transit.

Carefully unwrap the valves. You will find the following: -

4 x 211 valves (two per chassis)

4 x 5R4WGB valves (two per chassis)

2 x 6V6GT valves (one per chassis)

Once again, please understand that it is absolutely vital these valves are fitted

correctly.

Looking from the front of the amplifier install the 211 valves first: -

VALVE INSTALLATION

Inspect a 211 valve and you will notice that there is a small ‘pin’ protruding from one

side of the valve base; this locating pin ensures that the valve can only be correctly

inserted into the amplifier in one way.

Also examine the two large apertures in the top plate of the amplifier, located

between the small front valve and the black rectangular transformer covers. These

are the insertion points for the 211 valves.

1) Gently hold a 211 valve, and locate the small side mounted pin on the valve

base.

2) Line up this pin with the locating hole in the mounting aperture on the

amplifier’s top plate.

3) Gently insert the valve, and GENTLY twist in a clockwise direction, until the

valve ‘locks’ in position, and no more movement can take place.

Please make sure that steps (1), (2) and (3) are correct. Check again that both

valves are fully inserted correctly in to their respective valve sockets.

VALVE INSTALLATION continued…

Looking from the back of the amplifier, insert the 5R4WGB valves into the two empty

sockets located on the left, situated between the black rectangular transformer

covers and the loudspeaker connection binding posts. Locate the rib on the central

pin of the valve and align with the valve base (it can only be inserted one way due to

this locating rib) and with gentle but firm pressure insert the valve.

Finally, insert the small signal valve into the front socket. The valve can only be

inserted one way.

Check one more time that all of the 5 valves are correctly fitted, and

repeat the process for the second amplifier.

VALVE INSTALLATION continued…

Line inputs Being mono power amplifiers, each ANKORU/II chassis is fitted with

one XLR / Balanced input, located at the front of the left hand side of

each amplifier. Connect the outputs from your preamplifier to these

inputs.

Ground Post A ground post is provided for connection to those source components

that also use a separate ground terminal.

Speakers Each amplifier is equipped with 2 colour coded binding posts for

connection to your speakers.

Connect the amplifiers black speaker output binding post to the black /

negative terminal (also marked “ –“) on the speaker.

Connect the amplifiers red speaker output binding post to the red /

positive terminal (also marked “ + “) on the speaker.

Mains The ANKORU/II use an IEC 320 mains inlet socket for each chassis.

Use the supplied mains cablesto connect the unitsto the local mains

supply. The mains fuses are located in separate fuse holders located

on the rear panel of each chassis.

Special Note –Make sure that all connectionsare tight and clean. For

best results use good quality audio interconnects. Although it is

perfectly acceptable to use cables manufactured by other companies,

for best results and performance, we recommend our own Audio Note

(UK) range of interconnects and loudspeaker cables. For further

information, please consult your nearest Audio Note (UK) dealer, or

alternatively please feel free to contact us directly.

CONNECTION

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