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Search: Posts Made By: Curious.George
Forum: General Electronics Technical Discussion 08-11-2018, 02:54 PM
Replies: 5
Views: 152
Posted By Curious.George
Re: AC/DC variable voltage adaptor for Noctua NF-S12A ULN fan

Apples vs. Oranges.

Do you need active cooling for a 20W audio amp made of discrete semiconductors? (No, because the heat is dissipated in various components separated by large enough distances...
Forum: General Computer Discussion 08-11-2018, 12:48 AM
Replies: 28
Views: 356
Posted By Curious.George
Re: Easier Hardware-based raid management

Google "PUIS". Linux will have hooks for this.
Forum: General Electronics Technical Discussion 08-10-2018, 02:09 PM
Replies: 26
Views: 398
Posted By Curious.George
Re: Anyone repair appliances? GE ice maker issue

Components are designed with end products in mind. You don't expect every component to be "top shelf" -- even if used in a piece of disposable kit?! Hence 1000hr and 5000hr caps, e.g.



No,...
Forum: Troubleshooting Power Supplies and Power Supply Design 08-10-2018, 02:02 PM
Replies: 9
Views: 104
Posted By Curious.George
Re: UPS beeping continuously

APC units will squeal incessantly if the battery is dead. Have you checked to see if there is a blown battery fuse?

Note that the UPS shouldn't be "hot" with no load if on mains power.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 08-10-2018, 01:48 PM
Replies: 9
Views: 130
Posted By Curious.George
Re: Storing extension cords (suggestion)

By way of illustration, three examples of 100 ft of cord. From left to right:

12/3 on a cable reel
16/3 on a spool
14/3 "air wound"


Note that the spool requires the "inner end" of the...
Forum: General Computer Discussion 08-10-2018, 01:12 PM
Replies: 28
Views: 356
Posted By Curious.George
Re: Easier Hardware-based raid management

There are two issues.

First, verifying that the unit (model number) CAN do a cold start (assuming you may find that feature desireable at some time; if not... moot point).

Second, being aware...
Forum: General Electronics Technical Discussion 08-10-2018, 12:59 PM
Replies: 5
Views: 152
Posted By Curious.George
Re: AC/DC variable voltage adaptor for Noctua NF-S12A ULN fan

What you've not said (but appears to be implied) is your belief that this adapter would be a suitable power source for the fan (which, apparently, is a DC fan hence the variable voltage gives you...
Forum: General Electronics Technical Discussion 08-10-2018, 12:53 AM
Replies: 26
Views: 398
Posted By Curious.George
Re: Anyone repair appliances? GE ice maker issue

This brings up an interesting question: how long should things plan on lasting? Note that designing for a longer lifespan adds to cost -- will most folks be willing to pay that additional cost?
...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 08-08-2018, 11:58 PM
Replies: 9
Views: 130
Posted By Curious.George
Re: Storing extension cords (suggestion)

Spools take up a fair bit of extra space, are "rigid" (so the space they demand has to be of a certain size AND shape -- invariably larger than that required for the coil of wire, itself), have to...
Forum: General Computer Discussion 08-08-2018, 02:21 PM
Replies: 16
Views: 231
Posted By Curious.George
Re: Building a Router Server?

I use a little PE840 as a "4 slot drive host". It's got a disk cage that will handle 4 SATA drives (I never hot-swap -- color me paranoid!). I have a replacement cage that handles SCA drives so it...
Forum: General Computer Discussion 08-07-2018, 08:48 PM
Replies: 16
Views: 231
Posted By Curious.George
Re: Building a Router Server?

1U boxes tend to suffer from "NFS" (Noisey/Nasty Fan Syndrome).

It, no doubt, has very few drive bays. You could use it as a "NAS appliance" and swap the drives out to bring other drives on-line...
Forum: General Computer Discussion 08-07-2018, 08:38 PM
Replies: 2,240
Views: 345,060
Posted By Curious.George
Re: best cheap/free scores 1.1

Half-dozen t610 (https://support.hp.com/us-en/document/c03235347)'s and a dozen t5740's (https://support.hp.com/us-en/document/c01926337) I'll use them in the design of an inventory control system...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 08-07-2018, 07:32 PM
Replies: 9
Views: 130
Posted By Curious.George
Re: Storing extension cords (suggestion)

That builds the "wrong" twist into the cable and leaves it more susceptible to tangling when you try to despool it. If I tried to do that with my 100' 12/3's they'd end up looking like crullers! ...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 08-07-2018, 05:47 PM
Replies: 9
Views: 130
Posted By Curious.George
Re: Storing extension cords (suggestion)

We treat XMAS lights that way -- one string per "shoebox". But, they are much flimsier and hard to get to "lay" in a stable coil.

Take a coil of 12/3 (or even 14/3) ROMEX and you'll have no...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 08-07-2018, 05:44 PM
Replies: 9
Views: 130
Posted By Curious.George
Re: Storing extension cords (suggestion)

If you methodically coil the cord -- half a twist with each loop you accumulate -- and DON'T VASILATE FROM ONE SIDE OF THE COIL TO THE OTHER (hence the half twist), the cord will play out just as...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 08-07-2018, 01:56 PM
Replies: 9
Views: 130
Posted By Curious.George
Storing extension cords (suggestion)

I probably have more extension cords than most folks. And, heavier (AWG) ones!

They are always a hassle to store as they don't have nice convenient shapes, don't fit well in boxes (e.g., 100' of...
Forum: General Electronics Technical Discussion 08-07-2018, 12:05 PM
Replies: 26
Views: 398
Posted By Curious.George
Re: Anyone repair appliances? GE ice maker issue

The two ROUND, black spots (one above the other) to the right in your first photo represent the leads that feed the heater. Check for an open. Trace the pigtails to see what they tie to.

Note...
Forum: General Electronics Technical Discussion 08-07-2018, 11:57 AM
Replies: 20
Views: 377
Posted By Curious.George
Re: "Good" universal remote ?

Personally, I'd recommend against the Logitech devices. Too expensive, some require a "special" battery, all require an on-line service to program them and the overall "experience" is disappointing....
Forum: General Electronics Technical Discussion 08-05-2018, 10:54 PM
Replies: 13
Views: 332
Posted By Curious.George
Re: How do I calculate the amp hour for a device to run on battery power

I suspect that "a long time" will be "about a year".

Keep in mind that if you are using multiple cells, you have to decide how to interconnect them to power your load.

And, more importantly,...
Forum: Troubleshooting & Designing Networks 08-05-2018, 07:26 PM
Replies: 4
Views: 175
Posted By Curious.George
Re: Fiber bridge?

Excellent! Thanks!

Now the trick will be to get them to ante-up $100 to buy two sets...

But, at least I can ask my other contacts for anything similar sitting on a shelf!
Forum: General Electronics Technical Discussion 08-05-2018, 07:23 PM
Replies: 20
Views: 377
Posted By Curious.George
Re: "Good" universal remote ?

I've rescued several Logitechs. While they more-or-less do the job, there's always some feature (of the controlled device) that they've omitted. Or, put in a stupid place (like one of the "soft...
Forum: Troubleshooting & Designing Networks 08-04-2018, 02:21 PM
Replies: 4
Views: 175
Posted By Curious.George
Re: Fiber bridge?

It's not the power for that SINGLE interface but, rather, using a fiber capable switch (instead of a smaller, more efficient NON-fiber capable switch) just to get the fiber interface.

Single-link,...
Forum: Troubleshooting & Designing Networks 08-04-2018, 01:04 PM
Replies: 4
Views: 175
Posted By Curious.George
Fiber bridge?

I've been asked to deploy a small LAN at a local non-profit. As there are several "remote" buildings, I'll have to run optical fiber to connect them (reliability).

Normally, I'd just cable...
Forum: General Computer Discussion 08-04-2018, 12:53 PM
Replies: 28
Views: 356
Posted By Curious.George
Re: Easier Hardware-based raid management

You should also test to see if the UPS will support "cold start" (not all will). And, how it will handle that condition with your load.
Forum: General Computer Discussion 08-04-2018, 12:38 PM
Replies: 28
Views: 356
Posted By Curious.George
Re: Easier Hardware-based raid management

That's true of any bit of kit that you didn't "purchase new" (e.g., your PE1800). IME (I have 10 of them running at the present time), the problem (reason for the disposal) with any of the "better"...
Showing results 1 to 25 of 500

 
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