This has always been the case. The standard IRLP node has a 12.0V +-5%
power supply, that plugs into the AC outlet.
Many people have found that if they hook the computers up to other
voltages (particularily 13.8V from a standard power supply), the system
can lock up, the power supply board gets hot, and the nodes will not turn
on until the power is removed and reapplied at a lower volatge.
The 12V supplied to the computer is floated off the AC adapter, with most
likely Zener Diodes to shunt anything over 13V.
The optional power supply allows connection to anything from 6-24V, which
is particularily good for repeater sites, or if you want to power it from
the same supply as the radio.
Hope this clears it up a bit.
On Mon, 16 Apr 2007, Keith VE7GDH wrote:
> To Dave VE7LTD...
> I don't know if it was mentioned when you took the first orders for embedded
> nodes last summer, but I see that at www.irlp.net/embedded you now indicate
> that a special power supply is required to run the node from an external
> supply if it's over +13V and that supplies for running at over 13.8V are on
> special request. Do you know if the early embedded nodes had that same
> Keith VE7GDH
> Node 1148
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