[Elecraft] Items you think you can depend on

[David Woolley]

This appears to be cross-posted between mailing lists, something I would 
not recommend.  I'm dropping the one to which I am not subscribed.

There are two classes of "12V" equipment:

* equipment designed for lead acid batteries, of which amateur radio 
equipment is typical;

* computer equipment.

The former is actually designed for 13.8V with a wide tolerance, 
although mainly downwards.

The latter is designed for 12.0V with a tolerance of maybe 5%, and 
expectations of rather better.  Depending on what it contains, it may 
actually tolerate a rather wider range.

-- 
David Woolley
K2 06123

On 05/09/17 01:09, Phil Kane wrote:
> That is true for Elecraft equipment but I was referring to "generic" 12V
> stuff.  For example, some "12 V" things that I use are external disk
> drives, powered USB hubs, radio accessories, and computer peripherals of
> all sorts.  Some manuals list this, sometimes we are lucky just to get
> an instruction sheet with pictures let alone text.