Do AntMiners comply with FCC Part 15?

[pinhead666]

I used to have a bunch of S1's and S3's powered by ibm dps2000's.When I switched them on I lost about half of the tv-channels.Well they came back after 12-16 hours thou.Wifi worked well.I never bothered to examine what caused it.Those tanks didn't need to reboot very often.

[notlist3d]

Reviving this thread as I have just acquired a secondhand S3 that seems to produce a ton of RF interference.

No radio (by which I mean normal broadcast FM or DAB radio) will work at all within about 15 feet of the miner.  Unfortunately I haven't a lot of flexibility with siting it and so at the moment I can't use it at all.  Switch the miner on and about 5 seconds later the radio can't find a station (DAB) or just has static (FM).

I'm confident I've isolated it to the miner itself as the cause.

Anyone experienced this or got any ideas how to address it?

Put an Iron case around it..? hehe but really.

Well I have thought about something like that, but ...

A) I'd have to get the cables in somehow; and
B) how would I cool it?

Are you sure it's the S3 putting out the interference? I know I had 4 or so of them in a room and a HAM radio antenna on the roof above.   I never had any issues.

Is the PSU and radio connected to the same electrical circuit?  If so might look at the PSU itself.  I just really don't see the S3's putting out 15 foot of interference.  They are pretty well encased in a nice metal case.

I am pretty confident it is the S3, I have tested the PSU without the AntMiner; and I have tried both mains and battery powered radios; the issue is only apparent when the AntMiner is active.

How bad is reception?  Normally a standard microwave has much much more RF interference.   When you turn on your microwave do those channels stop working?

[tertius993]

How bad is reception?  Normally a standard microwave has much much more RF interference.   When you turn on your microwave do those channels stop working?

There is no reception at all on a DAB radio it just shows "station unavailable"; an FM radio just gives static.

I don't have a microwave so can't comment on that.

[notlist3d]

I am pretty confident it is the S3, I have tested the PSU without the AntMiner; and I have tried both mains and battery powered radios; the issue is only apparent when the AntMiner is active.

I should have asked.  But when you say testing the PSU without the antminer did you plug it into something of equal load as the S3? Or did you just turn it on with nothing attached to it?

[tertius993]

I am pretty confident it is the S3, I have tested the PSU without the AntMiner; and I have tried both mains and battery powered radios; the issue is only apparent when the AntMiner is active.

I should have asked.  But when you say testing the PSU without the antminer did you plug it into something of equal load as the S3? Or did you just turn it on with nothing attached to it?

No, just turned it on I have no other way of loading it, so definitely a possibility, though it is a new Corsair CX750M so I'd hope fairly well made.

[notlist3d]

I am pretty confident it is the S3, I have tested the PSU without the AntMiner; and I have tried both mains and battery powered radios; the issue is only apparent when the AntMiner is active.

I should have asked.  But when you say testing the PSU without the antminer did you plug it into something of equal load as the S3? Or did you just turn it on with nothing attached to it?

No, just turned it on I have no other way of loading it, so definitely a possibility, though it is a new Corsair CX750M so I'd hope fairly well made.

There could be lots of possible causes.  It could be anything from the wiring it's self to a device.   With just turning on the PSU it's not putting the load on the wires, so does not show much.

Is it possible that your S3 is causing it?  Yes but highly improvable in my opinion.  You really need something with same load to test the PSU.  I think PSU or wiring, or other causes are most likely. 

The S3 is just built like a tank with metal around it.  But if you are sure it's the S3 you could build a faraday cage around it.   

[tertius993]

Useful thoughts there, thanks. Wondering if this is actually a ground/earth issue at the socket.

Will do some more testing.

[notlist3d]

Useful thoughts there, thanks. Wondering if this is actually a ground/earth issue at the socket.

Will do some more testing.

Not a problem at all.  Unfortunately they can be hard to find the cause.  If you Google there are a few common ones it could be.

You might bring S3/PSU to friend or family's and test it out there to see what happens to radio there. I think it will still work at their house, but I could be wrong.

[jstefanop]

I don't think mining is for you if your seriously care whether a chinese bitcoin hardware manufacturer is complying with US FCC regs...lol

[Geremia]

I don't think mining is for you if your seriously care whether a chinese bitcoin hardware manufacturer is complying with US FCC regs...lol

Yeah, I know what you mean, but I'm worried about excess RFI.