flex 3000 watt and swr reading on a dummyload

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  • Updated 1 year ago
after connecting my flex 3000to a dummyload i see the folowing reading 
power 82 watt swr 1.3

when in normal transmit mode sthe power do not go to 100 watts even in fm and tuning mode 
do i need to send my flex 3000 in for calibration or is there a known problem 
Photo of Martijn Verhoef

Martijn Verhoef

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Posted 1 year ago

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Photo of John - AI4FR

John - AI4FR

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I think very few Flex radios hit that "nominal" mark of 100 watts on all bands. With that said, there are some things to check, DC power at the radio, power cable length, connector quality, and so on. On the 6000 series I have read that the recommended voltage at the radio is a good 14.4 volts DC. Check it on both receive and transmit, expect a slight drop by a few tenths of a volt during transmit.
Photo of WX7Y


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your power supply voltage may be a bit low at the radio, it needs to be upwards of 14.2V AT THE RADIO during TX to produce 100 watts output. 
Sounds like your radio is working fine if your running at 13.8V. 


Photo of K4MT


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As said if your power supply reads properly at the radio then you might need calibration.  Mine  had power levels different on all bands and the power reading in PowerSDR was 10 watts lower than actual output power.

I have a Powermaster meter and did the calibration and now my 3000 is 100W on all bands and readings in PowerSDR are correct as well. 

You could have a corrupt xml file and there is a procedure for copying EEprom data from radio back into PowerSDR but a help desk ticket and conversation with Flex will answer if this might be the cause.

Of course no one will hear the difference between 85 watts and 100