Diamond SX-400 Power SWR Meter for VHF UHF radios - A Detailed Review

Today on HamRadioComms I do a detailed review of this excellent Power/SWR meter.
This meter will work with radios that are in the 140 - 525 Mhz frequency range.

[@melissarainchild]

thanks! Full refresh of a forgotten art: antenna maintenance :)

[@BogusBolloks-mf4wq]

TY for all the info👍
I just received mine (SX-600)
I love the classic design.
Mainly bought it for my UHF repeater antenna.
Will also use on my CB antenna in future when the installation is done.

[@buzzsah]

I have the sx600 and like you, I find it to be all that I need.

[@Ploggy.]

Great review very helpful thank you 🙂👍

[@hamradiocomms]

Thank you! 🙂

[@jackmichael9606]

Hi, if the SX-400 meter will work with radios that are in the 140 - 525 Mhz frequency range, so it will not work for the air band with a frequency range of 118 Mhz - 137 Mhz ? Also, on the 13.8v DC power of the unit, would the center point of the plug be positive? Thanks and hope to hear from you soon.

[@hamradiocomms]

Hi Jack, correct won’t work for the air band, I’m not sure what SWR wattmeter works for those frequencies. Yes positive for the center pin.

[@bitemykrank1970]

@@hamradiocomms I have a Sharman SWR-006 meter. It looks exactly the same as yours with the exception of it being full coverage with dual input and output. Sensor 1 covers 1.8-160mhz, sensor2 covers 140-525mhz. So Airband, 2m, 70cm and UHF CB are all covered. The Diamond Brand needed for the same coverage is the SX-600

[@Ianistrip]

Hello,
The blue button's use??

[@hamradiocomms]

Hi., the blue button switches between Average and PEP readings.

[@cdlthelion6034]

Cut to the chase, let's see it operate, put some power into it.

[@kenwilliams563]

Is it actually accurate? reverse the connections on the back and see if it still reads the same...

[@pietrareddoch3641]

🅿🆁🅾🅼🅾🆂🅼