Vanderveen MCML05 Step By Step Construction Manual Download Page 3

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SAFETY INSTRUCTIONS
1) This construction kit employs high voltages (220/230 Volt 50 Hz AC and 200 Volt DC). These voltages

are potentially lethal if they come in contact with the human body. This is why you must take the
greatest care to avoid accidents or damage of any kind.

2) Only work on the opened amplifier cabinet after the mains plug has been removed from the mains

socket AND after the amplifier’s high voltage supply has been discharged by first switching the amplifier
to the off mode for several minutes.

3) Never work with both hands placed in the amplifier at the same time when it is switched on, or when

there is still a high voltage present in the set. This situation is extremely dangerous, as leakage or
discharge currents may flow from hand to hand via the heart.

4)  Only use the prescribed fuses.
5)  Take care to ensure that all high voltage leads are insulated and positioned far away from metal parts.
6)  DO NOT SHORTEN THE LEADS OF THE TRANSFORMER as this can cause irreparable damage to

the transformers.

7) Do not insert conductive objects into the cabinet.
8) Thoroughly check that the electrolytic capacitors are mounted as instructed, take care not confuse the

negative pole with the positive pole, as this could cause acid to leak or for the capacitor to explode.

9) Thoroughly check that transformer leads are connected to the PCB and other parts in accordance with

their prescribed colour scheme.

10)  Ensure that valve sockets are mounted the right way round in accordance with the diagram.
11)  When switching on for the first time explicitly follow the “test procedure” given for the completed set.
12)  On the following pages you will find the so called “EG-verklaring van overeenstemming” with

explanations. To meet the terms of this declaration, the constructor has to follow ALL directions and
conditions.

13) Make sure that there is sufficient room around the amplifier for ventilation; at least 3cm is required each

side and 10cm above. Take care to prevent any fluids from entering the amplifier. If this happens,
immediately disconnect the set from the mains supply and send the amplifier to Amplimo to be checked.
Also note that the cover located above the valves will become warm. Take care at all times to prevent
the cover from being touched (paying special attention to children). Again with children in mind, position
the amplifier so that it becomes impossible to poke metal objects into the cabinet.

14) This amplifier has to be earthed – ensure that the mains socket has an earth connection.
15) With soldered joints, hook the wire in place to form a mechanically stable joint before soldering. This

ensures that the wire cannot become loose to cause potential damage or to become a hazard. A piece
of heatshrink sleeving around this type of joint not only prevents you from touching the bare terminal,
but is also gives extra protection against the contact from working loose.

16) Where two or more wires are soldered in close proximity to each other on the PCB or for instance on

the volume control, they have to be secured in place by the use of a cable tie. This prevents the wires
from drifting around in the cabinet if they accidentally become unsoldered.

Amplimo b.v.

Industrieweg 14

NL-7161 BX NEEDE

The Netherlands

Tel: +31(0)545-28 3456

Fax: +31(0)545 28 3457

Email: [email protected]

Internet: www.amplimo.nl

Ir. Bureau Vanderveen b.v.

Sassenstraat 21

NL-8011 PA ZWOLLE

The Netherlands