Kenwood manual SPS separate power sources TS-480HX only, SPS schematic diagram

SPS (separate power sources) [TS-480HX only]

SPS is shorthand for “operating at 200W using two 100W 13.8V power sources.” To generate a 200W output from 13.8V requires a maximum (total) current of 41A. As previously explained, the TS-480HX employs a pair of 100W final amps. What the SPS design does is to supply these amps from two separate power supplies, as shown in Fig. 3 below.

The use of two power supplies may appear inconvenient, but in actual fact this arrangement is quite practical. Many customers already possess a 100W class power supply, so when they acquire this 200W transceiver they do not have to make an additional purchase of a new 200W class power supply. It is possible for them to make use of the 100W unit in their possession.

The PS-53 power supply is specified for the TS-480; however, as long as it can produce 20.5A or more continuously at 13.8V, other power supplies can be used. Also, it is possible to operate this transceiver using a single power supply that can produce at least 41A continuously; note, however, that two power cables would still be needed.

Fig. 3: SPS schematic diagram

DC1 connector

Drive amp

Other circuits

Final amp 1

Final amp 2

DC power

supply 1

(13.8V, ≥20.5A)

DC power

supply 2 (13.8V, ≥20.5A)

Chassis

DC2 connector

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