5
The printed circuits have been designed under radiofrequency criterion. The copper
thickness has been raised to 105
µ
m and, 'ground planes' that increase the propagation velocity
through the tracks and an special ground distribution that cancels any hum have also been added.
3. INSTALLATION
3.1. Placement, mounting, installation
The PAM1000/1400/2000/2600 models are presented as a 19"rack module of 3 units high
while the PAM300/600 models are presented as a 19" rack module of 2 units high.
The amplifier must not be completely enclosed and/or under high temperatures. A path for
cool air to the inlet of the forced air tunnel must be provided. The air inlet is on the back of the
amplifier; the air cools, in order, the filter capacitors, the transformer and the heatsink and gets out
on the front of the amplifier thus avoiding an excessive heat accumulation when mounted in a rack
and extending the electrolytic capacitors life. It is also convenient to place the amplifiers over the
others machines and not under them when mounted in a rack.
In all models, the cooling air flow increases as a function of the amplifier internal
temperature thanks to the progressive cooling system.
Four plastic washers are supplied to protect the fixing profile when the amplifier is mounted
in a rack. It is also advisable to use fixing guides on the sides of the rack for a better security of the
amplifier, specially when transport can be usual.
Optionally, and to ease the transport, a handle set is available.
3.2. Mains connection
All the models can be supplied for 110/120/220/240Vac ±15% and 50/60Hz, depending on
the country (see characteristic label on the amplifier), being the approximate power consumption at
full power:
MODEL
PAM300
PAM600
PAM1000
PAM1400
PAM2000
PAM2600
POWER C.
530VA
965VA
1290VA
1800VA
2730VA
3650VA
Contact our Technical Services whenever a supply voltage change should be needed.
WARNING!: By convention, the mains wire colour assignement is the following:
- BLACK
=
Phase
- BLUE
=
Neutral
- YELLOW/GREEN
=
Earth
The PAM1000/1400/2000/260 0 models have been provided with a soft start that limits the
current peak when starting up the amplifier to a maximum of 25A. This system enables the
simultaneous connection of various amplifiers without overloading the magneto-thermal switches
and also increases the electronics reliability thanks to the suppression of the initial transitories. The
PAM300/600 models do not need this system because of their lower power.
Make sure that the mains wire is not engaged with the signal wires in order to avoid
possible hum.
Five slow blow fuses, 2 on each power module and 1 in the transformer primary,
are disposed in the amplifiers (10 for the PAM2000/2600) as a protection against
