In brief: Based on review measurements: Ripple: RK8009 (50 mV vs. 100).
Model RK8009 Riden · 2026 Read review → Multichannel DC-DC converter 2016 Read review → Under load, V 81 10.73 Ripple, mV 50 100 Review conclusion Recommended With reservations
Only in one review: Voltage 80 V (RK8009); Current 9 A (RK8009); Power 720 W (RK8009); Test current 9 A (RK8009); Efficiency 98.9 % (RK8009).
RK8009: The converter showed low ripple, high efficiency and good thermal performance; its main drawback is limited input-voltage headroom.
Multichannel DC-DC converter: Easy to assemble and works right away, but the converter is weak, with noticeable ripple and voltage drop.
Figures were taken from the review text and checked against the quoted passages. Measurement conditions differ between reviews, so read the reviews yourself before buying. Prices at the time of review.
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