http://elecraft.85.s1.nabble.com/Wattage-Draw-K3S-100-vs-KPA500-KAT500-for-UPS-tp7633842p7633844.html
Something is not right. If your UPS is showing 350 with the K3S at idle and over 900 on transmit that is a difference of close to 600. The K3S draws 17-22 amps at full key down and 100 watts. Assume 20 amps at 13.8V. That is only 276. You are showing double that.
> On Aug 30, 2017, at 6:16 AM, MaverickNH <
[hidden email]> wrote:
>
> As mentioned in another thread, I'm running my shack on a UPS that is rated
> 1500va/900w. With my K3S/100 and other hardware plugged in on the same input
> the UPS often max's out at 900W at < 100W on the K3S. Typically, the
> baseline with K3S on RX is ~350W and it spikes over 900W with TX at 100W and
> the UPS limits output. So it seems 100W isn't 100W.
>
> I'm looking to switch in another UPS rated 2200VA/1320W, or 420W higher, for
> use with the KPA500/KAT500 I just acquired from another forum member. so
> from a 100W station to a 500W station. Might this work or is the increase in
> watt TX not equal to the watt drawn?
>
> BRET/N4SRN
>
>
>
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