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Radio1950 · 5th Nov 2018, 3:38 am

Having said all the above, I too acknowledge that RF power measurement can be tricky, even at HF.

So what did we use professionally for this task, in a certain govt department that maintained ground Air Traffic Control equipments eg ILS, VOR etc 75-340 MHz and up to 50W ??

This was subject to external audit against ISO9000+ for methodology, accuracy of results, traceable calibration, and staff competence.

Weinschel 10 and 30 dB 50 watt attenuators or similar, and HP432/437 with HP478 sensor etc.
For accurate and practical measurements with portability, you cannot beat this.

(For HF High Power, sometimes we used a rack mounted 75 ohm Bird Termaline (with crossed meter needles!)

5th Nov 2018, 3:38 am	#59
Radio1950 Hexode Join Date: Apr 2017 Location: Buderim, Queensland, Australia. Posts: 428	Re: RF power meter calibration Having said all the above, I too acknowledge that RF power measurement can be tricky, even at HF. So what did we use professionally for this task, in a certain govt department that maintained ground Air Traffic Control equipments eg ILS, VOR etc 75-340 MHz and up to 50W ?? This was subject to external audit against ISO9000+ for methodology, accuracy of results, traceable calibration, and staff competence. Weinschel 10 and 30 dB 50 watt attenuators or similar, and HP432/437 with HP478 sensor etc. For accurate and practical measurements with portability, you cannot beat this. (For HF High Power, sometimes we used a rack mounted 75 ohm Bird Termaline (with crossed meter needles!)