EMF radiation from inverter?

[Sunking]

You are inside a nice strong steel Faraday cage where the EMF is being generated and the antennas are on the outside of the cage. As long as the input stage of the radio is well shielded I would not expect problems.

Would not make any difference. Power Line Frequencies do not interfere with Radio or Sonar frequencies.

Now I know you are going to say Power Lines generate a lot of interference with radio frequencies which is true, but has nothing to do with EMF. That Interference is cause by the Isolators used to support the lines to towers and poles. When they crack or get contaminated the High Voltage arcs to the support structure which generates RF and Sonic emissions.

I have only witnessed one case where EMF caused interference with sensitive electronics. It was at a hospital in a Nurses station. Here old fashion CRT has distorted picture, or test lines. Hospital electricians tried everything they could think of and could not fix it. So they called me in to see what was going on. Took me 2 minutes to find the problem and fix it and collect a $1000 check.

Her desk was up against a wall, and the Monitor was up against the wall. I asked what was on the other side of the wall? Electrician answered: Electrical Room. Walked in and immediately seen a 3-pahse 480 volt 100 KVA Transformer against the wall. Guess what was on the other side of that wall? Yep her CRT. Moved it two feet and problem solved. The magnetic field was bending the electron flow in the CRT. Easiest $1000 I ever made. I knew what it was immediately, seen it before with a large magnet near a CRT. For whatever reason the hospital Electricians were not happy with me.

Morro of the story. Do not put a 2000 pound transformer in close proximity of anything that is sensitive to a magnetism. In this case within 3 feet. Only protection you need from a Small GTI inverter is a Tin Foil Hat or stay at least 6 inches away from it. Take your pick.

I can only think of one thing you would not want to put on or within a foot of a GTI. A Compass. If you are afraid of EMF, you need to get rid of everything you own with a Magnet. Start with your refrigerator or anything with a motor, phones, and speakers. If you do that, trust me, you need a Tin Foil Hat so everyone knows what you are and can stay away from you.

[icebox]

I did a little over 20 years operating Inertial Navigation systems on subs. Extremely sensitive accelerometers monitor gravity vortexes with enough detail that we use them to navigate submarines. While remaining submerged for months at a time, we can circumnavigate the planet, while maintaining extremely precise navigation. While locked inside a steel pipe with a nuclear reactor, hundreds of nuclear warheads and lots of high power wiring. I have never heard of EMF causing interference to those accelerometers.

I'm familiar with those inertial reference units, earlier models used lasers fired in a prism to determine latitude by measuring the deflection caused by the amount of gravitational pull.

[icebox]

On another topic sort of, I posted in another thread, is a west external wall ok to mount an SE inverter? My neighbors house is about 20 feet east, it'll provide shading early morning.

[inetdog]

... Radio is never bothered either.

You are inside a nice strong steel Faraday cage where the EMF is being generated and the antennas are on the outside of the cage. As long as the input stage of the radio is well shielded I would not expect problems.

[Sunking]

I did a little over 20 years operating Inertial Navigation systems on subs. Extremely sensitive accelerometers monitor gravity vortexes with enough detail that we use them to navigate submarines. While remaining submerged for months at a time, we can circumnavigate the planet, while maintaining extremely precise navigation. While locked inside a steel pipe with a nuclear reactor, hundreds of nuclear warheads and lots of high power wiring. I have never heard of EMF causing interference to those accelerometers.

Neither have I. USS La Jolla SSN-701 82-85. Sonar and Radio is never bothered either.

[organic farmer]

I did a little over 20 years operating Inertial Navigation systems on subs. Extremely sensitive accelerometers monitor gravity vortexes with enough detail that we use them to navigate submarines. While remaining submerged for months at a time, we can circumnavigate the planet, while maintaining extremely precise navigation. While locked inside a steel pipe with a nuclear reactor, hundreds of nuclear warheads and lots of high power wiring. I have never heard of EMF causing interference to those accelerometers.

[Sunking]

Did I insult you in any way?

I have worked with very sensitive electronic equipment for over 40 years, EMF does not affect it unless you have no clue what you are doing. If makes no difference if it is DC being converted to AC or vice versa. They all use the exact same technology with no problems. You are just simply making up a problem that does not exist. Unless you have a rather large football field size Radio Telescope. EMF from power line frequencies is of no concern. Even if you did is no problem in the labs, it is only a problem with the over head lines the utility uses. Utility is only a problem because they cannot run their phase conductors tightly coupled together. When you couple the conductors together, all EMF is cancelled out and the magnetic field collapses on itself. At power line frequencies the field cannot travel far because the frequency is too damn low to radiate. That is why you can run power lines through densely populated areas. The lines are high enough the magnetic field does not reach the ground.

So unless you are generating 345,000 volts with 1000 amps of current in the middle of your living room, you got nothing to worry about. If you think otherwise you need a Tin Foil Hat.

[inetdog]

Thanks for the input. I wouldn't go as far to create a faraday cage as some have suggested.

My question was aimed at organic farmer, I was not referring to an inverter, but rather a rectifier.

I see that now. Most computer and other power supplies these days take the incoming 120V AC, convert it to DC with diodes into a capacitor and then invert that DC as part of a DC-DC converter that produces the actual low voltage used by the equipment. (Generally categorized as a "switching power supply" rather than an inverter.)
In the old days the AC went through a 60Hz transformer (lots of copper and iron) and the low ouput voltage was rectified, filtered and regulated. Not done that way much anymore except for DC welders, etc.

[icebox]

The GTI does not convert AC to DC it converts DC to AC. As such it contains a number of fast switching elements (not sure what type of semiconductor is used). And any fast switching will generate high harmonics up into the RF range. It is a question of just how much, how well shielded the enclosure is, and how well the input and output leads are filtered.
A battery powered off-grid inverter will be switching very high DC amps and so is likely to generate more noise for the same output power level.

Thanks for the input. I wouldn't go as far to create a faraday cage as some have suggested.

My question was aimed at organic farmer, I was not referring to an inverter, but rather a rectifier.

[inetdog]

Wouldn't it be a rectifier used to convert ac to dc?

The GTI does not convert AC to DC it converts DC to AC. As such it contains a number of fast switching elements (not sure what type of semiconductor is used). And any fast switching will generate high harmonics up into the RF range. It is a question of just how much, how well shielded the enclosure is, and how well the input and output leads are filtered.
A battery powered off-grid inverter will be switching very high DC amps and so is likely to generate more noise for the same output power level.

[icebox]

Get a Tin Foil hat. Either that or quit believing in Santa Clause, Tooth Faries and nonsense. .

Did I insult you in any way?

[organic farmer]

I'm not concerned from a personal health aspect, but I keep some sensitive equipment nearby for work and hobbies.

Your sensitive equipment can not share the same building as energized wiring; exposed light bulbs, a microwave oven [with 1,000 watts of deadly microwave], electric appliances.

Have you considered making your shop into a faraday cage? You could use kerosene lamps. So there was no need to electric wiring.

[icebox]

You live inside of a home with energized wiring; exposed light bulbs, a microwave oven [with 1,000 watts of deadly microwave], plus all sorts of electric appliances.
And likely a dozen other inverters [do you have a PC? Inverter in it's power supply], Do you have a cellphone or smart phone? How do you charge it without an inverter?

But you are afraid of living inside a house with this inverter?

Wouldn't it be a rectifier used to convert ac to dc?

[icebox]

I'm not concerned from a personal health aspect, but I keep some sensitive equipment nearby for work and hobbies.

[organic farmer]

Yes, internal wiring. Were you getting at something?

You live inside of a home with energized wiring; exposed light bulbs, a microwave oven [with 1,000 watts of deadly microwave], plus all sorts of electric appliances.
And likely a dozen other inverters [do you have a PC? Inverter in it's power supply], Do you have a cellphone or smart phone? How do you charge it without an inverter?

But you are afraid of living inside a house with this inverter?