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Old 10-13-2015, 03:11 PM   #1
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Electronics question?

We have our 2015 Salem 31QBTS in a campground that doesn't have very good radio reception The factory stereo seems to lose signal more and more as we turn on lights or any other DC powered devices I think the factory power converter isn't strong enough to handle the load is there another way I can power the factory stereo/DVD player other than with the built in inverter
I tried a signal booster but it's DC also and hooked to the same power supply so it didn't make a difference
Any suggestions???
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Old 10-13-2015, 03:40 PM   #2
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I would look behind the unit and ensure that the antenna is connected properly and tightly and is separate from the nest of other wires behind the stereo first. I really do not think the dc power is the issue here, the stereo uses very little power, but check the dc power cable connections also when you have the stereo out.
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Old 10-13-2015, 03:44 PM   #3
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I checked all that when I put the signal booster in but when I turn the radio on it's fine as you turn a light on the signal starts to fade away turn another light on and it fades even further that's why I'm thinking its the power
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Old 10-13-2015, 03:52 PM   #4
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Are the connections to the power inverter from the stereo correct and not reversed?
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Old 10-13-2015, 04:03 PM   #5
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Yes I'm familiar with wiring stereos
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Old 10-13-2015, 05:26 PM   #6
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I am an EE with lots of experience with consumer electronics. I have to say, that your symptoms, if I understand them correctly are VERY strange. In the case of low power, the audio would be the first symptom. (distortion or lower volume). Adding a lamp etc to the load, would hardly make any difference in station reception. It would probably require a drop of 4 volts or more for it to bother the RF reception. If that were the case, you would certainly notice a drop in the lamp(s) brilliance. In any case, the first thing would be to check the voltage to the unit. With no other loads and then keep measuring as you add loads. As a matter of interest, does your FM and AM do the same thing? Any other devices that use this stero? CD's etc. I would try that.
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Old 10-13-2015, 05:46 PM   #7
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What kind of light bulbs do you have??? Are they LED??
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Old 10-13-2015, 05:48 PM   #8
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Several forum members have reported that some LED lights have internal drive circuitry that emits sufficient RF to interfere with radio and/or TV reception.
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Old 10-13-2015, 05:55 PM   #9
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Yes, it COULD be RF issues with LED drivers, however the OP said with ANY DC powered loads.
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Old 10-13-2015, 09:47 PM   #10
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Sounds like perhaps the inverter itself (if the stereo is 110v powered) or the 12v power supply (which I'm guessing is what you really mean) may be outputting a lot of electrical noise (especially when under heavier load) which is interfering with the radio signal. You could try putting an RF choke on the supply to the stereo.
It may even be that there's a faulty capacitor on the 12v output stage of the psu causing the extra noise.
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