I have a rasberry pi device (a helium miner, a bobcat 300), and I'm now on my 6th power adapter for the device, as all of the previous adapters have burnt out after 1 or 2 weeks.

Here is the pertinent information:

I live in Canada in a single detached home, and have not had power problems in the past at all. The device itself takes a DC12V input, 1a, and I have a surge protector device at the outlet (amazon link here). Originally the device was directly plugged into the wall, and ran for about 2 months. I then installed a large 8dbi antenna on my roof that connects to the device by a long LMR400 cable, and pretty much since then its been burning out power adapters.

I buy equivalent adapters from amazon, and the device works again as normal for a week or two, and then one day its dead as a doorknob. I opened up one of the burned out adapters and there is nothing obviously burnt or broken (and tried different devices to confirm they are really dead). I had an electrician come to my house and check the outlet I was using, and he said it was completely normal for the voltage and Hz. I tried different outlets, including running an extension to another room. Other devices are plugged in the room INCLUDING other power adapters and they have not failed the same way.

Here are my basic questions:

1. Could the connection to an antenna somehow cause just the power adapter to burn out?
2. Could the raspberry pi/bobcat miner device be causing it to burn out?
3. Is it possible to diagnose HOW the power adapters failed if I take it to an.. electrician? electronics repair shop? (and therefore get a clue as to what is happening?)
4. Is it possible to get some kind of power adapter that would be more impervious to any of the possibilities that might be burning these out?

I'm getting really tired of shelling out 20 bucks every 2 weeks for another crappy Chinese power adapter (I've gone through 5 brands too), and I'm hoping someone can at least give me some ideas.

Thanks in advance!

I have a Rasberry Pi device (a Helium miner, a Bobcat 300), and I'm now on my 6th power adapter for the device, as all of the previous adapters have burnt out after 1 or 2 weeks.

Here is the pertinent information:

I live in Canada in a single detached home, and have not had power problems in the past at all. The device itself takes a DC12V, 1 ampere input. I have a surge protector device at the outlet (Amazon link here.)

Originally, the device was directly plugged into the wall, and ran for about 2 months. I then installed a large 8dBi antenna on my roof that connects to the device by a long LMR400 cable, and pretty much since then its been burning out power adapters.

I buy equivalent adapters from Amazon, and the device works again as normal for a week or two, and then one day it is as dead as a doorknob. 

I opened up one of the burned out adapters and there is nothing obviously burnt or broken (and tried different devices to confirm they are really dead.) I had an electrician come to my house and check the outlet I was using, and he said it was completely normal for the voltage and Hz. 

I tried different outlets, including running an extension to another room. Other devices are plugged in the room INCLUDING other power adapters and they have not failed the same way.

Here are my basic questions:

1. Could the connection to an antenna somehow cause just the power adapter to burn out?
2. Could the Raspberry Pi/Bobcat miner device be causing it to burn out?
3. Is it possible to diagnose HOW the power adapters failed if I take it to an electrician or electronics repair shop? (And therefore get a clue as to what is happening.)
4. Is it possible to get some kind of power adapter that would be more impervious to any of the possibilities that might be burning these out?

I'm getting really tired of shelling out 20 bucks every 2 weeks for another crappy Chinese power adapter (I've gone through 5 brands too), and I'm hoping someone can at least give me some ideas.