bart.smaalders@gmail.com wrote:
> On Jun 13, 9:49 am, Dave <f...@coo.com> wrote:
>> I'm looking to use a Sun Netra T1 onboard an aircraft where the supply
>> is 120 V 400 Hz
>>
>> The specs on the Netra T1 are:
>>
>> 100 - 240 VAC, 47 - 63 Hz, 2 A (max)
>
> Simplest and easiest: http://www.elect-spec.com/freqchgr_a.htm#E
>
> Next: Find a model 100; it had a DC power supply 40->70 VD, 4 A max.
> input. Use
> a 400 Hz Variac (http://www.elect-spec.com/variac_400.htm) to reduce
> the voltage
> to the desired level, and rectify to produce the desired input
> voltage. If it turns out that
> you really have single phase (unlikely), you'll want some caps to
> smooth things out.


>
> None of this equipment is air rated, of course... remember that the
> T1 is thermally limited
> to 10,000 ft elevation during operation.

The aircraft will not be flying, so altitude is not an issue.

But that 10,000' feet assumes the only air around is due to the
atmosphere - not an aircraft where there is a continuous supply of air.
So I doubt a T1 would object to flying at 25,000' in the passenger
compartment of an aircraft. (I've certainly used various bits of
lab-grade test equipment and computers in aircraft before while flying
at high altitude, with no ill effects). Put a T1 at 25,000 feet on a
mountain and its a very different matter. But this does not matter here.

> The odd of the standard AC switching power supply coping w/ 400Hz
> input is low.

I guess thinks like zero-volt switching and power factor correction
might be an issue. Personally, if I had to take a guess, I'd say it
would be ok, but I am far from confident of that.