Huntkey Jumper 600B Power Supply Review
Ripple and Noise Tests
Contents
Voltages at the power supply outputs must be as “clean” as possible, with no noise or oscillation (also known as “ripple”). The maximum ripple and noise levels allowed are 120 mV for +12 V and -12 V outputs, and 50 mV for +5 V, +3.3 V and +5VSB outputs. All values are peak-to-peak figures. We consider a power supply as being top-notch if it can produce half or less of the maximum allowed ripple and noise levels.
The Huntkey Jumper 600B provided extremely low ripple and noise levels for the +5 V and +3.3 V outputs, but with a level above what we would like to see at +12 V, but still below the maximum allowed.
| Input | Test 1 | Test 2 | Test 3 | Test 4 | Test 5 |
| +12VA | 35.0 mV | 46.2 mV | 58.8 mV | 70.2 mV | 88.8 mV |
| +12VB | 27.6 mV | 36.2 mV | 47.8 mV | 57.6 mV | 73.4 mV |
| +5 V | 7.2 mV | 8.6 mV | 9.6 mV | 9.2 mV | 12.0 mV |
| +3.3 V | 10.0 mV | 9.6 mV | 10.6 mV | 10.6 mV | 14.8 mV |
| +5VSB | 7.4 mV | 6.6 mV | 9.0 mV | 10.2 mV | 12.4 mV |
| -12 V | 26.4 mV | 29.6 mV | 35.0 mV | 40.8 mV | 45.6 mV |
Below you can see the waveforms of the outputs during test five.
Figure 18: +12VA input from load tester during test five at 598.8 W (88.8 mV)
Figure 19: +12VB input from load tester during test five at 598.8 W (73.4 mV)
Figure 20: +5V rail during test five at 598.8 W (12 mV)
Figure 21: +3.3 V rail during test five at 598.8 W (14.8 mV)
Let’s see if we can pull more than 600 W from this unit.