Including the outdoor dry cooler? How many ton is it good for with say a desired miner fluid temp of 140F (60C) and a worst case hot outdoor temp of 110F (43.3C).

$30k is a decent ballpark, possibly sorta low.

While yer here, I'm going to upgrade firmware tomorrow and see newer versions in the github.
https://github.com/Canaan-Creative/avalon7-docs/wiki/AvalonMiner-721-firmware-downloads
Any reason to NOT try using the even more recent 20170310 release vs the Dec 29 one?

oh, re:

As in the AC power plug? Don't do that... As you may have noticed there can be a nice fat spark from the high-side DC caps charging up. Rather hard on the plug and socket pins.

If is a server supply there will be a DC-ON jumper or switch. On the Bitmain APW supplies it is the green jumper. Use that to switch the DC on and off.

Exactly. Besides, when I got them I was making BTC hand over fist and since the now-defunct TigerDirect accepted BTC, well, was just the thing to do.

Now 1st place I look is Overstock.com 'cause they take BTC

For the Avalons, ja. Not so easy with the Bitmain products. Still as I keep saying, for most operations UPS is overkill. In my case the reason for the always on-line UPS's at home was sag. Some summer days the nominal 230v went as low as 180v and of course the generator does not kick in until it goes below 178v. Can't adjust the trip point so got the Cyberpowers. They will supply the miners perfect 240v even with the line below 160v so no-mans-land dead-zone is covered.

Sidenote to that: Got the whole-house generator after the 2-week long blackout that hit Michigan, Ohio, and part of Ontario several years ago. Up until 2 years ago when a huge storm literally blew out the local substation and grid it was needed several times a year. After those repairs, power has been much better, last year worst sag was only down to 208 so very happy with the new grid lines they installed everywhere and outages have been rare

If is a mega-farm then my plan would be to have backup genset(s) yes but manually control changeover.
eg.
Power drops out, let miners go offline and remain powered down(network gear IS of course on a UPS).
Start generator if not automatic.
Contact power company.
If after a few min still no power - change over to generator
Start miners

When stable power returns:
shut down miners
Change over to Utility power
restart miners
Kill genset

Whole point there of course is to minimize how many times all those $&^#! miners of yours need to be restarted.

My theory is that it did not like the Vcore settings that Auto-tune came up with. Never seen a board read zero. Is the lil' red LED's on the hash board lit?

With the s9's I will sometimes see one board come up about 500GHs or more slower than the others, 1-2 soft boots and then it picks up speed and is happy again. Looking at the logs when happy the twitchy board is at a slightly higher Vcore than when unhappy.

Arrg. The 741 I have at work just got twitchy and has dropped to 6.4THs for the past hour vs its normal 8.2ish. So, I'll update the firmware tomorrow and see if takes care of this.

Any reason to NOT try using the even more recent 20170310 release vs the Dec 29 one?

No, just usually don't care about ads. Love that GIF site tho bookmarked and gif saved.
Damn -- back feeling twitchy again so time hit a roach Nice having my MM Green card

Oh that is just hilarious
And the phone battery life will be just how many minutes? Even plugged into a good charger say, 2.1A, that gives 10.5w of power. Barely enough to run a single 2Pac stick from Sidehack @15GHs. Of course the phone itself will want some of that power as well.

Crap. There goes Physics getting in the way again...

On the whole you are right -- with Bitmain and other stand-alone miners, PSU's drop out and everything including the controller shut off. With Avalon's, up to you how you power the RiPi but do realize that the 5v supply to the RiPi will probably hold up longer than the hash board power does. So far seems twitchy with my Avalon's on recovering from a power blip but a full hard boot fixes that.

Where possible problems can happen is when the power comes back on. Rarely is it a clean on-again, the voltage WILL briefly bounce around - IF the controller happens to be writing to a flash memory address or SD card and the process is munged by a couple false-restarts, that is when memory corruption can happen. The old s2 was a prime example of that. In the case of the Bitmains it is not the ROM segments that can be affected - it is the flash memory holding user settings and whatever Auto-tune comes up with. Knowing Bitmain I doubt they properly implemented any kind of power-fail-stop-writing logic. Ideally the IP-Reporter reset button trick *should* reinitialize/format the flash subsystem.

Do take note of the 'if' and 'can' -- unlikely to happen but cannot be dismissed. Is probably the reason that Bitmain always states something along the lines of waiting several min or (much) more after updating before you do a reboot.

All that said, again, I have a reason for the 2x 3KVA UPS's I use at home. For most folks, not needed. Then again I also have a permanent genset tied to the gas line for whole-house backup. UPS's handle the brief time between power and generator kicking in and xfr time when power comes back on so it's non-stop mining for me at home

***  Foxminers LLC If someone buys this miner without a well-known and trusted Forum User 1st getting one for doing a review and posting it here then well, you have been warned ***

Bitcoinist has joined the ranks of folks in screamin' SCAM! http://bitcoinist.com/foxminers-interview-dual-scam/

Per the article:
"An old lady called Brenda sent us an email and explain to us how she is able to create ASIC which can mine 2 algorithms at choice"

So now the person(s) behind this are now trying to shift blame to her, the only visible person so far....

***  Foxminers LLC If someone buys this miner without a well-known and trusted Forum User 1st getting one for doing a review and posting it here then well, you have been warned ***

Thought that might be the case. I removed reference to being part of Foxminers

Small but important language lesson:
"I" or "me" = the person talking. That is why easy to assume you were part of Foxminers.

You wanted to use the word "they" which = different person/company

Also, do not immediately defend a product without reading WHY it is called a scam. Discussion of that is over and does not need to be repeated. The first 4 pages provide absolute proof. Read them, then post an opinion.

This thread is now in Busting mode against them.

***  Foxminers LLC If someone buys this miner without a well-known and trusted Forum User 1st getting one for doing a review and posting it here then well, you have been warned ***

For a start, aside from the very obvious plagiarism of SFARADS SF3301 data sheet dated Feb 11 2015 there is the issue of no one EVER seeing that equipment in real life. Not seen at trade shows, no reputable people giving reviews, no evidence from pools showing SUSTAINED hash rate at real-world difficulties, etc.

Just as with Baikal, eBang, Hotmine and Panda, folks here will be more than happy to retract SCAM statements and in fact endorse the product WHEN THEY PROVE THEIR CLAIMS.

edit: @ jimbo, then why did you say "but why do everybody accuse me of being a scammer"?
edit edit: removed associations between jimbo and Foxminers. Translation error

Just like de'ja vu all over again...
Please ref https://bitcointalk.org/index.php?topic=1888591.msg18761611#msg18761611 for my choice of UPS.
And yes they are big'uns.

Riiiight.....
It all depends on ones situation.

I got the 1st Cyberpower UPS in 2014 originally to power my Ant s1/3's. It 'cost' me nothing as they were paid for in BTC from farm income. At the time was running 6 miners at home and that was about 1/2 my hash power. Considering I travel a LOT having the backup was pretty necessary since I could not get to the miners sometimes for weeks. The 2nd UPS was bought after the s5's came out and again just for the home farm.

***  Foxminers LLC If someone buys this miner without a well-known and trusted Forum User 1st getting one for doing a review and posting it here then well, you have been warned ***

Love the last 2 lines in the "interview":

And how did Panda, not to mention eBang and Hotmine resolve peoples suspicions? They accepted known reputable peoples offers to do a review of the equipment plus started their campaigns by demonstrating the gear at tradeshows. Ya know? Real hands-on proof.

As a business plan, blitzing the media without a single shred of physical evidence of their Miraculous Mining gear ever existing (much less being possible with foreseeable tech looking out a few years) is just plain stupid -- or of course the blatant proof of a scam in-progress.

Glad to see someone from Canaan here. Welcome StevenMosher!

Query: Is the error control process and speed throttling why the miners report hash rate to monitor programs like we see in post #345? (saving eyeball room by not reposting pic so soon). The plot is 1hr long.

I talked to the author of Awesome Miner and he looked over what the api reports and said that graph is accurate and is what cgminer reports when queried by Awesome every 15 seconds. Don't get me wrong - the graph may not be pretty but the total average hash rate seen by kano is correct so this is not a problem, just a puzzle. I just wonder what the Canaan does to make their GUI graph so even.

Love your miners and so far have 3x 721's and 2x 741's

And probably still even some old OS/2 dll's a well. In the early 90's before their tiff with IBM, MS wrote some of the code under contract and kept their rights to it. I know the Win OS's as recent as XP has DLL's tagged as OS/2, not sure it the Vista/Win7 re-code finally took them out.

Well as I posted in the other thread, yes it should be removed as part of due-diligence. And as with most embedded networked devices seems the designers just-don't- give-a-shit.

http://www.electronicdesign.com/embedded-revolution/beware-brickerbot-iot-killer is one Robin Hood's shot at IoT 'security'

Please see my replies on this:
https://bitcointalk.org/index.php?topic=1888573.msg18762495#msg18762495
and
https://bitcointalk.org/index.php?topic=1888573.msg18762648#msg18762648
I will verify with my s7's tomorrow.