Friday 24 January 2020



Pretty much all radios have an SWR Meter built into them these day, but they're invariably small and not too easy to read. They can also only read one thing at a time usually (although there are exceptions to this like on my IC-7100), so it's not a bad idea to have one meter permanently in line showing Pwr, Ref & SWR while your radio(s) can be set to show ALC or whatever other measurement you opt for.

Looking on the market there are lots of choices out there, but I didn't want to spend a fortune, so I opted for a mid-upper range and ordered the NISSEI DG-503 which covers HF, VHF & UHF. All up to a couple of hundred Watts. Leaving it inline will lose you about 0.3db which is more than acceptable to me.
This SWR / Wattmeter Nissei DG-503 has a digital backlit display and allows the measurement of SWR for HF frequencies from 1.6 to 60 MHz and VHF-UHF from 125 to 525Mhz, as well as the measurement of the power up to 200W.
The SWR / Power Meter DG-503 can be used directly, with calibration.
Its low insertion loss allows it to be permanently connected.
Accuracy: +/- 5%
Antenna Connector: 2 * 2 UHF Female (SO-239)
Power supply: 12v with power cable included.

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