The Triad VPS12-2000 transformer seems to be the best readily available
alternative to the original wall-wart power supply so far for the ESE
ES-911/GPS/NTP. The two 6 volt windings can be strapped in parallel to
provide 4 amps. It won't fit within the 1U case so some sort of
external enclosure is necessary.
While the ES-911 will operate on a 6 volt 2 amp wall-wart and the
internal 5 volt rail is within spec, the other voltages are low. With
the Triad unit, the internal battery now floats at 6.8 volts, a more
reasonable value. Under load, the Triad puts out 7.1 volts AC, the same
as the no-load output of the 2 amp wall-wart previously used.
This information may be of some use to others who obtain an ESE
ES-911/GPS/NTP or similar unit that is missing the external AC power supply.
KE6CD
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