W0SD wrote: »
I am disappointed by not surprised that I have RFI noise on amateur radio. I find a "birdie" about every 24 khz on all the amateur bands. I am using an Outback Flex 80. If I shut the breaker off to the four 205 watt 24 volt panels the "birdies" go away other than on 80 meters
I can still barely hear them and if I shut the Flex 80 off then they go away. When the controller goes to "sleep" I of course do not have them.
I have twisted the wires out of the controller going to the battery and I have tried ferrite all to no avail. I did some "sniffing" with my HT on two
meters and I find the lines with about 50-60 volts coming in from the panel are radiating as well as those going to the battery bank. It would
not be real hard to put the wires going to the battery bank in conduit but I wonder if anyone has had success doing this. I would assume you would have to bypass each end of the conduit to ground? It would be a lot more difficult to put the wire coming in from the panels in conduit. I have the first 25 feet buried.
It is coming in over the antenna's as I can use antenna's farther away and the "birdies" are weaker and I can point my beans away and they
Another question? I note that the Xantrex MPPT controller has an FCC Class B rating. Is there anyone here that has this unit and could tune the ham bands and tell me if they have "birdies" They are very loud and are, not problem to hear from the Flex 80.
niel wrote: »
the inductance that is added is to affect frequencies far beyond what the desired frequency is (0hz) and the power content of those harmonics are much lower, especially in the rf spectrum range of things, so it will not have an adverse effect to the controller imo. we are NOT talking of very large amounts of inductance in the suppressing emi/rfi.
54d18 wrote: »
I then added
a small, maybe 100 pF Ceramic Cap accross the solar leads and that
pretty much did it.
Scuba-Junky wrote: »
Which controller model? What end of the solar leads did you put the cap? Solar end or cc end of cable? Are you a ham radio op and if so, did this clean things up for the HF bands? What voltage is your panel array? What voltage is your battery system? I'm starting to think that all of these factors play into the equation.
John said, " ... But on the other hand , with everything coming from china [ too many lack of quality from there ] gear .I suspect the issue will only get worse ... ".
Welcome to the Forum. Yes, the previous post was dated Sept. 2013.
Of course, NOT everything comes from China -- MidNite products are made in Washington state, USA.
Also, regarding noise from MPPT Charge Controllers (CC), Emission regulations from the FCC, begin for frequencies of 30.00 MHz and above. The entire HF spectrum Emissions regulations apply to Line Conducted Emissions from about 150 KHz to 30.0 MHz and only for electronic devices that connect to the AC power mains. These HF emissions are much stronger than those that are radiated, above 30 MHz.
As has been noted in this discussion, there are a number of effective Emission reduction techniques for CC emissions, and similar solutions that apply to inverters and other switching devices -- on our properties. Emissions from close neighbors, not so much.
IMO, 73 GL, Vic
It is possible that RFI could be causing this issue.
But, somehow, I kinna doubt it. Do wonder if some other device in your area is using the same 433.XX MHz frequency for remote control -- Keyless Entry, UHF TV/Satellite RX Remote, RADAR, etc.433.XX MHz is used for auto Keyless Entry systems for cars built for the non-NA market. All of the remote control devices use very low power, but the receivers in controlled devices are usually quite crude.
433-ish MHz is in or near an ISM band, IIRC. There could be some such device near your location that might be running more output power than a typical remote transmitter ... :https://en.wikipedia.org/wiki/ISM_band
RFI from Power Electronics should have its Emissions well attenuated, at your remote light's frequency.
No time now to spend on this, but isolating the components of your system might help you get a better idea of what is happening ..
More later, Vic
Thanks Estragon for the update. Knock, knock ... hope that you have found the culprit in that thermometer.
Good luck, and please let us know how things are going. Thanks, Vic