My single Phase 235 volt T21

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philipma1957:
Okay there was and is a nice thread by Danieleither.

https://bitcointalk.org/index.php?topic=5490991.msg63879624#msg63879624




It talks about buying T21 units and getting stuck with three phase power.

I did the same as Daniel in fact I ordered three 1 just came with 2 on the way.

I have single phase 230 and was really angry.


But With some work and looking for ways  some I found some are on danieleither thread.

I have a working t21 using a 230 volt psu .

quote of myself below

"my meter reads 2782 watts for 157th that is about 17.72 watts a th"

the software number reads high 3050+

philipma1957:
spacer

so some power numbers

157th with cold air 45f open garage door  burns 2750 around 17.7
140th with cold air 45f  garage door burns 2460 around 17.5

will do 175th next.

philipma1957:
spacer.


Parts needed a bitmain T21 miner

the correct controller I have the Civtek it is no good.

the epic controller with firmware 42 is mint and works.

proper buss bars. I ordered them from Altairtech but got short ones.

my s19xp has the right buss bars.

a s19 psu.

parts list from altairtech.

controller
https://altairtech.io/product/epic-umc/

psu
https://altairtech.io/product/epic-umc/

four pin pwm fans as the fans that come with the t21 have wrong connector.

epic controller wants standard four pin fans.

https://altairtech.io/product/antminer-120mm-replacement-fan-for-s19-s17-s11-s15-and-s9-series/


Note the
bus bars I ordered below are no good I will ask Altair-tech to check the rest of them. so they do not get sent to you and they are short mine were under cut by ¼ inch.

https://altairtech.io/product/antminer-power-bar/


I am tired will post more later tonight.  edit the buss bars are not long enough

philipma1957:
spacer

garage door shut room kind of warm watts are  2868 hash 157




garage opened cools off around 20-30f



with temps cooler watts drop 2758/  th 157 = 17.5 watts a th for the t21 pretty fucking good.

philipma1957:
here it is set to 180 th.

note it says watts are 19.1

meter gives me 18.5

and if I open the garage door to cool room meter gives me 17.5 watts

a nice piece of gear. two more on the way.

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