INDEX Page. 23 of 89
7. POWER SUPPLY (PSU)
The power supply of the SPE Expert 1.5K-FA, unique in its category, is switching with a
PFC (Power Factor Correction) that allows a drastic reduction of the harmonic
components in the mains in accordance with IEC555-2, that consists of two sources.
The first powers all the electronic circuits, with the PA being excluded.
The second feeds only the PA. Its output voltage is selected based on the required
output power level.
This design was adopted as it provides maximum efficiency and therefore less heat to
dissipate.
Every precaution has been adopted to eliminate any disturbances produced by
switching, the figure shows the spectrum analysis in the 10 m band.
As one can see, the result is practically the limit of the analyzer.
The power supply meets the following applicable standards: UL60950-1, TUV
EN60950-1, EN55022, EN61000-3-2,-3, EN61000-4-2,3,4,5,6,8,11; ENV50204,
EN5502.
Since the amplifier is sold all over the world, the power cord does not come with any
mains plug. Some SPE distributors will fit the plug appropriate to your domestic supply
network prior to purchase. Should it be necessary to rewire the plug due to relocation in
a different country, please ask for advice from a qualified electrician.
To fit the plug (20 A minimum rating below 120V AC, 10A minimum rating above 120V
AC) proceed according with the following fig.
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