SBS PA250: An FM power amplifier with a wideband design, the PA 250 requires no tuning. One of the most novel features of the unit is the heat-dissipating fresh-air-tunnel with dual intelligent fans. These provide cooling to the specially designed heat sink in a stream of air that needs no filtering. No active components are in the air flow, thus keeping sensitive areas unsoiled. The PA 250 uses an efficient power- supply design, combining a toroidal transformer and switch mode regulator. Woven mat PTFE circuit boards, bonded to the heat sink/ground plane, are used to achieve thermal stability at the surface mounted component level.

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