Posts by PE1RTC

    Hello Pete, I would consider to buy a cheap "chinese power meter" with some attenuators and/or a directional coupler.

    If you have a small dummyload that coupler is not necessary but is maybe very practical for future in-line measurements.


    See other topic "chinese power meter".


    I bought one and (if calibrated for 1 frequency like 2400 MHz) it is a very useful meter. As i see that you don't have possibilities to calibrate it you can still use it with for example a 50 dB sma attenuator in series.

    In that case you cannot tell the exact amount of power but at least you can see if power goes out!

    I saw the meter for 40 euro at Passion radio in France so no need to wait till the Corona virus in China is gone.

    I am using this power meter in combination with a chinese directional coupler. At my work i have the possibility to compare it with (calibrated) network analysers, RF power meter and signal generators.

    In my case I found that this little power meter is accurate if you calibrate it for one frequency.

    Using it on another ham radio band will give complete different and false results.

    No problem, if you want to use it for just 2400 MHz, but of course you have to calibrate it for that frequency.

    With a 40 dB directional coupler and a 10 dB attenuator added my correction factor is 47,2 to measure 10 dBm power and 47,4 for 37 dBm.

    When sweeping the RF generator at qrl from 10 dBm to 37 dBm with 1 dB steps and comparing it to a calibrated HP powermeter i saw no more than 0,5 dB error...so in my opinion it is a cheap and (for ham use) very accurate possibility to do measurements at 2,4 GHz.

    For some weeks i used the MK2 with 28MHz, but when i had another look on it with a good hf generator and spectrum analyzer i saw the 2400MHz -28MHz carrier was about 25dB down and the +28MHz carrier only a 10 dB!!

    Since that time i use a Ukrain 144MHz transverter between my ICOM 7300 and the DX Patrol MK2.