Nissei DG-503 MAX digital dual sensor
Digital SWR/power meter 1.6–60 and 125–525 MHz, 200 W, DMR, SSB (PEP) and AM readings
The Nissei DG-503 MAX is a digital SWR/power meter for accurate measurement of forward power, reflected power and SWR, with two sensors (1.6–60 MHz and 125–525 MHz) and a range up to 200 W.
Product description
It derives from the DG-503 and keeps its functions, adding DMR (TDMA), SSB (PEP) and AM power readings, selected with a switch on the rear. In normal mode it measures CW, FM and FDMA.
Each band has its own SO-239 input and output connector. The large backlit 3.5" LCD shows forward power, reflected power and SWR at the same time; the backlight is powered from 12–13.8 V with the supplied cable.
Key features
Separate HF/50 MHz and VHF/UHF.
DMR, SSB (PEP) and AM readings.
Forward, reflected and SWR together.
Technical specifications
| Frequency | 1.6–60 MHz · 125–525 MHz |
| Calibration points | 28 / 145 / 435 MHz |
| Modes (analogue) | CW, FM, FDMA |
| Modes (MAX) | DMR (TDMA), AM, SSB (PEP) |
| Power | 0–200 W |
| Accuracy | ± 5 % |
| Minimum power for SWR | 1 W |
| Impedance | 50 Ω |
| Connectors | SO-239 (input and output for each band) |
| Power supply | 12 / 13.8 V DC |
| Dimensions | 140 × 84 × 122 mm |
| Weight | 750 g |
Package contents
- User manual
- 12 V DC power cable
HamRadioShop | SWR and power meters
