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*HOPING FOR A BETTER 2021 AND MORE OF THESE EXCELLENT FREE EVENTS ALL AROUND THE COUNTRY!

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CANCELLED because of coronavirus. Papplewick Pumping Station, Nottingham, Sunday 12th & Monday 13th April
CANCELLED because of coronavirus. Bournville Sub Day, Sunday 10th May 2020

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(CANCELLED) Submarine, Boating & Sailing Weekend, Norwich MBC, Weekend of 25,26th July

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Model Boat Convention, Haydock Park (Cancelled this year)

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CANCELLED. Bournville Sub Day, Sunday 13th September

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(CANCELLED) Club Submarine Regatta, Furness MBC, Barrow in Furness, Sunday 20th Sept 2020

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Latest topics

» openLRS on 458Mhz and 433Mhz and submarines
rf power meter for 433/458 Mhz EmptyFri Nov 20, 2020 4:35 am by tsenecal

» Making end caps
rf power meter for 433/458 Mhz EmptyThu Nov 19, 2020 3:20 pm by Cheapsub

» Hello from New York City.
rf power meter for 433/458 Mhz EmptyWed Nov 18, 2020 12:50 am by Cheapsub

» 915mhz / 868mhz as a viable frequency for submarines.
rf power meter for 433/458 Mhz EmptyMon Nov 16, 2020 6:34 pm by Cheapsub

» John Lambert plans for WWII British T Class sub 3rd. series, unmodified.
rf power meter for 433/458 Mhz EmptySun Nov 15, 2020 10:07 pm by tiger.tim

» Piston Tank - Depth Control (Paper by Wolfgang Baumann & Helmut Huhn)
rf power meter for 433/458 Mhz EmptySat Nov 14, 2020 1:41 pm by david f

» typhoon wanted
rf power meter for 433/458 Mhz EmptyMon Nov 02, 2020 2:10 pm by RanSand

» New AMS member Henry from South Australia
rf power meter for 433/458 Mhz EmptyTue Oct 20, 2020 3:27 pm by david f

» New member intro
rf power meter for 433/458 Mhz EmptyTue Oct 20, 2020 3:23 pm by david f

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    rf power meter for 433/458 Mhz

    david f
    david f
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    rf power meter for 433/458 Mhz Empty rf power meter for 433/458 Mhz

    Post  david f on Sat Dec 30, 2017 11:29 am

    rf power meter for 433/458 Mhz 20160610


    These notes refer back to the antenna experiments I was doing a year or so ago. (See the main thread on openLRS for the details.

    It turned out that the commercial/as supplied aerials actually work rather well and provide the best trade-off between performance and ease of use. Yagi aerials don't fit well  inside a submarine!

    An RF power meter was a useful tool to measure relative power. Tim S has given details for a commercial meter on the main openLRS thread but I looked around for a cheaper alternative. And here one is - Thank you eBay!

    The board is connected to a rubber ducky aerial and a 12v supply. I connected the output to a Digital Voltmeter on a 2v range. Very little soldering required.

    The unit puts out 0.5v which rises to 0.6 to 0.7 volts on a signal. It seems to work well/repeatedly and avoids having to wander around town looking at your transmitter!

    Some details:

    ORDER TOTAL
    £13.98
    See description
    Order 100--2500MHz RF power meter logarithmic detection power detection HF UHF BoardView similar items
    View seller's other items
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    1 item sold by wishyou-happy
    100--2500MHz RF power meter logarithmic detection power detection HF UHF Board
    100--2500MHz RF power meter logarithmic detection power detection HF UHF Board
    ( 331792564238 )
       Features:

       can measure 88-108,300,433,915,2400MHz , etc. Frequency
       Supply voltage: 6-15V

       Operating Current: 15mA

       Working Impedance: 50 ohms

       Input frequency: 100-2500MHz (Extended mode can be used 10-3500MHz)

       Input power: -70dBm ~ 0dBm (up to 70dB dynamic range)

       Output slope: 18mV / dB

      Current date/time is Wed Nov 25, 2020 1:48 am