[Elecraft] USB Cable Power Requirements

[Bayard Coolidge]

AFAICT, there is no specific power requirement mentioned for the KUSB (nor for the
Sabrent equivalent that I purchased at my local Tiger Direct store), which means that,
probably, it's safely within the 100mA power limit imposed by the USB spec.

BUT, you should be aware that the Signalink USB *does* require an external powered
USB hub, because it draws close to 500mA, and says so in its specs, etc. I'm running it
and the Sabrent off of a 7-port hub that I bought at Staples (yes, ouch... - do shop around
if you can, and balance availability vs. shipping costs, etc.) and have also run, at the same time,
an SCS PTC-ii USB off of that hub as well as a PS/2 keyboard and mouse when I had it all attached
to an Acer netbook. (These days, I'm running just the Signalink and the Sabrent to the iMac).
I have had problems with the mini-USB plug on the hub loosening up on me, however,
so if you have time to shop around, it's something to closely inspect.

HTH,

73 and Happy New Year

Brandy, N1HO


________________________________
 From: Joel Black <w4jbb at charter.net>
To: elecraft <elecraft at mailman.qth.net> 
Sent: Monday, December 31, 2012 10:25 AM
Subject: [Elecraft] USB Cable Power Requirements
 
Are there any power requirements for the KUSB cable?  I have looked all over the Elecraft page.  If the answer is there, I cannot find it.

I bought a Mac with only four USB ports and am going to purchase a powered hub.  One of the hubs offers seven ports, but only 2 A for all the ports.  The four-port version offers a full 500 mA per port.

Thanks,
Joel - W4JBB
_____________________________________________________