[Elecraft] KPA500 - power out question

[Tim Hague]

My KPA500 loafs at 400W with about 30W of drive (UK legal limit), driven to max power it's about 650W with 35W.
I think the disparity between results may be down to the type of load being driven.

Best regards, Tim Hague, M0AFJ
Skype m0afj.Tim
Sent on my iPad


On 12 May 2013, at 18:29, Scott Manthe <scott.manthe at gmail.com> wrote:

> My KPA500 puts out 600-650 watts with 35 watts drive on all bands.  I'm not sure exactly what's going on with people getting 350 watts out. I'd guess those reporting 350 watts are running high duty cycle modes, like RTTY or AM.
> 
> People listening to your signal will likely notice very little difference going 850 watts to 600 watts output. However, the KPA500 adds 6 meters, QSK and auto bandswitching, which for me was worth more than the 3dB I was losing going from 1300 watts to 650.
> 
> 73,
> Scott, N9AA
> 
> On 5/12/13 9:05 AM, Bill wrote:
>> Thanks to all who answered. I didn't know there was such a perceived difference, at the receiving end, between 500 Watts and 850 Watts. I have always been under the impression that doubling of power (3 db gain) was the least discernible difference and that if you did not, at a minimum, double your power - there was really little to be gained.
>> 
>> Also, I am amazed at the reported differences in power - from 350 Watts to 600 Watts. That is a rather large disparity.
>> 
>> Thanks,
>> 
>> Bill W2BLC
> 
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