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Showing 3 of 3 results by gregxploit
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Board Games and rounds
Re: BTCJam forum name verification
by
gregxploit
on 09/06/2016, 18:11:02 UTC
I want to link my Bitcointalk name with BTCJam's. Verification code: cd51b1a5-1066-4b1e-ac16-9156e60cf1fa
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Topic
Board Computer hardware
Re: Bladecenter H 2880W Breakout Boards. First batch closed, collecting deposit
by
gregxploit
on 05/02/2016, 17:08:18 UTC
If anyone from the initial group buy in North America has any problems with any of their boards, I would be happy to have replacements sent out immediately on behalf of J4bberwock.  Send me and J4bberwock a PM if you have any defects at all and we'll get you sorted out.

I live in the USA but I bought mine straight from J4bberwock.  I bought 8 of them and 4 of them turn on the PSU but do not turn on the fan.  I'm going to tear away the white glue stuff and make the following solder connections myself...

http://i.imgur.com/qiFVfJB.jpg

If this voids any type of warranty on them doing it myself, please let me know.  I've made thousands of solder connections.  I know what I'm doing.  For example, I engineered, designed and built these training boards to teach telephone technicians how to use their meter to identify and locate troubles.  The training boards have 192 solder connections each and the master board that connects them all together has well over 200 solder connections.  The entire setup has 6 training boards, one master board, 3 bride tap boards and one power supply.  I've made 6 sets up these training boards.  Each set has a total of 11 cases.  So, a total of 66 cases.

Picture of one of six training boards below.  Each board has the same resistance as 19,700 feet of 24 AWG wire and each board has the same capacitance as 19,700 feet of Air Core Cable [Not Jelly Core].  1,700 feet of the 19,700 feet is actual real wire.  I needed real wire for when I teach them how to use a Time Domain Reflectometer (TDR).

http://i.imgur.com/9EWBojf.jpg

Picture of 3 of the 6 training boards, power supply, 3 bridge tap boards and one master board.

http://i.imgur.com/asSxe8l.jpg

This is a picture of a class I taught in Leesburg, Florida.  I did a total of 22 classes in Leesburg with 12 technicians in each 4-Day class.  You see the 6 training boards connected to the black master board in this picture.  The power supply and 3 bridge tap boards are underneath the table.  I teach them how to use their JDSU HST 3000 to identify and locate troubles over a 4-Day period.  I wish I had them 2 weeks but I'm forced to teach them what I can in a 4-Day period.

http://i.imgur.com/8Ay71uQ.jpg


You managed to turn the fancoolers without break board?

I can indicate that I tap pin to light source 2880
Post
Topic
Board Computer hardware
Re: IBM 2880W Bladecenter PSU Breakout Boards - 80+ Platinum power
by
gregxploit
on 05/02/2016, 16:56:33 UTC
Hi:

Is it possible to solder the cables directly to this kind of PSU with out the need for breakout board like other lower server PSU ?

thank you.
Here are some pics of how we made the harness. My buddy owns a cable manufacturing company and even using $120,000 of equipment, the time and effort was not worth it. I only made these because of the delivery time to get J4bberwock boards for the first 52 Antminer S5's. I highly recommend not even consider doing harnesses and just buy the boards.

The equipment we used  to do this project was an auto feed wire cutting and stripping machine that did all the 10 gauge black and reds. Then we used  an automatic stripping machine to get .6" on the pre-made PCIE wires we got from klondike_bar. An ultrasonic welder was use to join the wires. Had to use a 150 watt soldering iron to join the welded pads to the power supply.

There is also a shot of the power meter when the room was hot and the fans were at max, it was drawing 3785 watts.


http://i.imgur.com/CFaH9p7l.jpg
http://i.imgur.com/dF4tHgdl.jpg
http://i.imgur.com/hYmu76ol.jpg
http://i.imgur.com/p5snliql.jpg


I put in bold letters the advice from the only guy that did it to my knowledge.

You managed to turn the fancoolers without break board?

I can indicate that I tap pin to light source 2880