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Old 12-30-2016, 03:48 PM   #1 (permalink)
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Default Horus Buzzing

I was wondering if anyone else has noticed that when you turn on the internal transmitter that there is a buzzing sound coming from the radio. It sounds like a transformer buzzing. Did not notice this when I first got the radio.
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Old 12-30-2016, 05:07 PM   #2 (permalink)
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I noticed it the first time I turned the internal antenna on. Didn't think much of it.
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Old 12-30-2016, 08:09 PM   #3 (permalink)
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Ok thanks, just wanted to make sure that it was normal to hear it.
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Old 01-08-2017, 07:40 AM   #4 (permalink)
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Ya know, ive been playing around with my horus and hadent noticed any buzzing, i'd turned the internal radio on and off as well....until. last night i was running through the bind procedure with an X6R and hooked up some servos for fun to verify it all worked and viola, i got a little buzzing when the internal radio was on. First thought is its some sort of feedback through the internal speakers? Not totally annoying, but def there.
Maybe i dident notice it before because it was very quiet.....read late.... last night when i was playing with the radio and usually its during the day and my house is much louder. Between kids and the dogs its possible it was just drowned out?
Im not terribly worried about it, my house is an interference nightmare anyways but hopefully the sound doesent get broadcast through the headphone jack as well? Kinda hoping to load up some music and pop in the earbuds without having to have my phone or ipod in my back pocket as well.
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Old 01-08-2017, 06:33 PM   #5 (permalink)
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I'm pretty sure the buzzing only starts once the internal antenna is activated because it originates from the antenna. My Spektrum radios do it too, just not as loud. I wouldn't worry about it messing up the headphone jack.
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Old 01-09-2017, 10:13 AM   #6 (permalink)
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Mine does it to. The Taranis also has this problem. People have added ferrite tape and rings inside of their Taranis TX to help reduce it.

I would have thought that FrSky would have fixed it in the new hardware. I'll be curious if the new QX7 does it as well. I'm thinking that they might just be reusing the same transmitter circuit which is causing the problem.
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Old 01-30-2017, 02:01 PM   #7 (permalink)
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My Horus never did it with my module until last update.
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