Surecom SW33 wattmeter review

For those looking to purchase the surecom SW33 power/SWR meter, I have included my findings of the one I purchased.  It can be found on Amazon.com for around $50 at the time of this writing:

I would say that this would be a waste of money overall. I’m sure most of you would agree. At $50 expectations are low. As you can see from the data, the SW33 is somewhat useful in the 2meter band. Unfortunately the device doesn’t perform well when you get to the top end of its range. UHF is sadly un-accurate. I suppose that if you were just looking to see if your radio was in fact doing something that it would show that. As you can see though, Its power reading is half of actual power at the top end if its range. For Ham use, which i would think is the major market for this device, the SW33 doesn’t perform well. I would like to see it cover up to 440Mhz with better results. It tends to perform better just below the 70cm band.

The VSWR function seems to perform better. If I get a chance to compare this to a vector network analyzer I will post that data as well but I suspect that the SW33 will be a better tool as a VSWR meter.

SW33 data

2 thoughts on “Surecom SW33 wattmeter review”

  1. Hi and thanks for the excellent review, backed up with real data!! Awesome!!! While the SW-33 may represent an overall waste of money for your application, what you have provided in your excellent review is confidence that for the massive numbers of us that may not yet be ham radio licensed, but that regularly use our marine VHF radios (where we have VHF antennas installed in highly corrosive environments atop our aluminum masts parked full time in salt water moorings), that the SW-33 is nearly spot-on accurate for measuring power output in the 150 to 160 Mhz marine frequency range that we mostly use, and can possibly be expected to also do quite well for measuring VSWR . Again… Thank you!! I will be ordering a SW-33 today.
    Gary in Florida… Now retired and an avid sailing enthusiast.

    1. I’m glad you found the information useful. It’s always nice to see the different applications people are using radio for. Happy sailing!

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