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  1. #11
    Flight attendant
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    it was very weird to feel hot hot the dongle is. Tried to find answers on the internet, many people seems to have this "problem" some say it is because of the "high" frequencies the dongle has to perform. Guess a fan could be a solution, but IMHO that should not be necessary.

  2. #12
    Captain abcd567's Avatar
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    glennblum's $10 fan to cool Pi and Dongle both

    Fan is connected directly to mains supply (110V AC)

    glennblum fan - 1.jpg glennblum fan - 2.jpg
    Last edited by abcd567; 2019-08-02 at 18:42.

  3. #13
    Flight attendant magnum's Avatar
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    I am using the blue FR pro plus stick, equipment is located in my home office under the roof
    Even with that hot weeks the stick is getting hand warm (outside surface) with a good traffic to be tracked over the day (approx 3500 aircrafts per day in average)

  4. #14
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    Such electronics can run fine at quite high temperatures for a long time.

    The failures you read about may not be connected to temperature.

    Anyway as your RPi is also throttling due to heat, the location seems to be quite hot.
    A case on the RPi will also make it produce more heat and transfer some of that heat via the USB port.

    So frankly either you don't worry about it, or you do something about it.
    What do you think is an acceptable failure rate for these devices for example, maybe it's lower when they run cooler.
    But the question, is it unacceptable when some of them run a little hotter, probably not.

    Still if you are unlucky, you'll have to get a new one. Or a different product there are other models rtl-sdr compatible receivers available.

    And as i already said, a plastic case and a metal case feel completely different while the electronics on the inside might be just as hot.
    Just not as noticeable.

  5. #15
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    As always , thank you for the feedback. will put the dongle on a "metal" .

    My Pi is in a case indeed. Will check temperature without a case as well.

  6. #16
    Flight attendant magnum's Avatar
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    I am using a P3 B in a normal environment (25°). The CPU shows a temperature of 55-58° inside the case. Removing the cover brings it down to 48-50°
    I do not use an active fan, only the heat sink

  7. #17
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    Ok that might be an idea. I do not have heat sinks for my P 3b+. Will check for them

  8. #18
    Flight attendant magnum's Avatar
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    Tests of heat sinks have shown that they can bring the temp down by 5-10°
    Leaving the case open can cause problems with dust and dirt

  9. #19
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    Sorry for the delay in replying.


    I have been searching the internet and there are many different opinions about the heat sinks. Some say that it is necessary because the pi will slow down. Some say that there are not so good/bad heat sinks. So good advice seems to be hard to get. There even some people telling that the "clue" used for the cheap heat sink, might even cause higher temperatures.

    I agree with you that using the Pi open it will get a lot of dirt and dust.
    So if you have an idea about which one will do please tell me

  10. #20
    Flight attendant magnum's Avatar
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    Based on the specs the Pi throttles if the temperature reaches a maximum.

    I am using a Pi 3 B with small heat sinks in a case. With four different feeders the CPU utilization is below 15% and the CPU is running constantly on 600 MHz. Temperature stable at 55-58°

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