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Comedian62
Posts: 2
Registered: ‎11-14-2006

Where do I get the AC to DC Power Adapter for a Linksys "Compact USB 4-Port Hub [USBHUB4C]

I have two Compact USB 4-Port Hubs, Model Number USBHUB4C.  These Hubs can be powered, but I cannot find any information on External Power Adapters for these Hubs in any of the documentation or on the Linksys Web Site.
 
I need to know if Linksys has such Power Adapters available, and if so what the Model Numbers are, and how or where to purchase them.
 
If I will need a third party Power Adapter, I need to know what the Output Voltage & Current requirements are, and I also need to know the Polarity of the of the two Jack Contacts.  [i.e. Is the center pin on the Hub's Jack Positive or Negative?]  If possible I'd like to have a recommended Brand and Model Number for the Power Adapter.
 
Thanks In Advance,
 
Bruce
 
ridcully
Posts: 2,329
Registered: ‎09-07-2006

Re: Where do I get the AC to DC Power Adapter for a Linksys "Compact USB 4-Port Hub [USBHUB4C]

hi , you will most probably have to get a 3rd party power adapter......the inner is the positive and the outside is negative
the specs are :- 5V 2.1A -- SMALL BARREL -- 100~120V
Comedian62
Posts: 2
Registered: ‎11-14-2006

Re: Where do I get the AC to DC Power Adapter for a Linksys "Compact USB 4-Port Hub [USBHUB4C]

Friday, August 28, 2009, 0302 PDT

 

Hi, again,

 

Boy, am I glad I was able to find an answer to my problem in here.  I find this very interesting. Here it is, almost 3 years after I made the original post, that I need to find the Power information, for this Device, again, but because of a Computer Crash, I could not get to the original notes, I made about this Forum Entry, so I began the search, again.

 

I find this very interesting. Here it is, almost 3 years after I made the original post, that I need to find the Power information, for this Device, again, but because of a Computer Crash, I could not get to the original notes, I made about this Forum Entry, so I began the search, again.

 

I have myriad AC/DC Converters, some of which are Voltage Selectable, but since the Power Specifications aren't on the HUB, or in the PDF Documentation, as is the case with most other Products, I came back to LinkSys/Cisco.  As soon as I entered the Model Number of the "Compact USB 4-Port HUBs, Model Number USBHUB4C," for a search, this Forum entry came up on the page, and it appears there haven't been any queries, on any other subject, about this Device, in the interim.

 

Since the entry has been Viewed 2,484 times, hasn't it dawned on someone that it might be a good idea to carry a Power Product, that is compatible with this HUB, or at least provide a Specific Source, with a Model Number, (for instance, a Radio Shack SKU) so we don't need to hunt for one, over, and over.  Why the information was never included in the package with the HUB, beats me.  (It should have been on the Device, itself.)

 

Anyone who knows anything about USB Devices, knows that many of them cannot be powered from the USB Ports on a Computer, especially, on Laptops.  Since one of the things mentioned in the Specifications is the fact that you can have "Max. Devices 127 (Daisy-chaining Hubs Together)," it would seem to be obvious that Power Information would be necessary.  Since the "Daisy Chain" number is true, it should be obvious, that the "Chain" would require quite a few AC/DC Adapters to power it, adequately.

 

When this Device was Designed, the requirement for External Power must have been known, or there would never have been a Power Connector built into the Device.  I've been in electronics for about 50 years, now, and I know that presently, it's a rarity that the Power Requirements aren't shown on the Device itself, with a Symbol depicting the Polarity of both the Inner, and Outer Conductors.  Even Toys have that information shown on them.

 

I love these HUBs, but LinkSys/Cisco has really dropped the ball on this one.  I'm guessing that a lot of people have discovered, that if this 4-Port USB HUB doesn't have External Power, they quickly decided not purchase another one, when they need to "Daisy Chain" them together, for their Network of USB Devices.

 

When you consider the loss of HUB Sales, coupled with a loss of income from a Power Supply they've never stocked, the numbers could be quite large.  That's not even considering the Support time I'm guessing would have been necessary when Customers determined they had a problem, and needed answers.  (It's not really a guess, since I talked to several Support People, without getting a satisfactory answer, before I finally came to this Forum, as a last resort.)

 

I was actually shocked to find that LinkSys/Cisco, didn't sell an AC/DC Power Supply for the HUB, because Power Supplies like that are so commonly required, with the Electronics sold, today.  I'd be willing to wager that LinkSys/Cisco does, in fact, carry an AC/DC Power Supply that would be compatible with the "Compact USB 4-Port HUBs, Model Number USBHUB4C," they sell.  When something like this happens, I wonder how many other Opportunities like this, have been missed by the people who work for this company.

 

We've all heard the expression about "Being too close to the Forest, to see the Trees."  This may be a good example of it's meaning.  At least I was able to find the answer to my Problem, thanks to the fact that the Query I made almost, 3 years ago, which had an answer, was still available to me, thanks to this Forum.

 

Very Interesting!

 

Bruce Feezel
Comedian62