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1  Bitcoin / Mining support / Re: Warm cables/power cords on: March 06, 2020, 06:50:30 AM
What kind of power supplies are you using? Power cables are usually rated in amps, but do not take power factor into their calculations. If a power supply has a PF of .8 then you'll actually be pulling 20% more Volt Amps than the watts you think you are pulling. Good power supplies can have a PF of .9 to .95, big difference.

Moral: You have to size your cables and plugs for volt amps more than watts. I've seen this happen a number of times.

I'm using the 1600W power supply from Halong. I'm not sure of their PF?
2  Bitcoin / Mining support / Re: Warm cables/power cords on: March 06, 2020, 05:45:57 AM
I'm so glad you mentioned this, I'll need to check but that might explain why the fans are like twin turbo jet engines 24/7.

To be safe, I'm running 2x T1's off a standard 13 Amp, 220-240 power strip. If I set the miners down to Efficiency Mode, do you think I can safely run 3 in total?

Thanks,
Stephen.
3  Bitcoin / Mining support / Re: Warm cables/power cords on: March 06, 2020, 04:44:50 AM
Apologies for the malware issues. I won't use that image site again.

The problem with buying cables in Hong Kong for mining is that the quality of the copper isn't so good on these mass produced items. I was told to go and buy them from Germany instead.

These cables cost around 1700 HKD at least premade, but I got them made up for 200 HKD sourcing each part individually that I felt seem good quality.

One rig did melt all the cables when I put in 3x S9 14T's on a standard 13 Amp power strip (+another server). Lasted for a year before the cables, power bank all disintegrated. The plugs were welded into place  Shocked

I'm now running DragonMint T1's but they seem to be pulling tons of power.
4  Bitcoin / Mining support / Warm cables/power cords on: March 05, 2020, 09:04:11 AM
Hi all,

I've been running several machines, and over time I've experienced very warm power cables to the point they melt. The standard 1mm(2) or 1.5mm(2) just can't cut it for 1600W devices.

So I've made my own. 2.5mm(2) cores, with MK plugs and power amp socket adaptors. Seems to be holding well (for now!)

https://pasteboard.co/IXEVZGn.jpg
5  Bitcoin / Electrum / Re: There has been an increased number of "fake" electrums out there, be careful. on: February 08, 2019, 08:20:37 AM
Hi all,

This is my first post.

I believe I downloaded the recent fake Electrum on Github after seeing an update for 3.4.1.

Back in December/Jan, I tried to install in on iMac, and it was giving me warnings when I tried to run it.

However, then I left it for a while, and only today I heard about the fake Electrum.

I just wanted to ask....how do I remove or check what's been compromised on my MAC?

Thanks!
sc
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