[Amps] KPA1500 Efficiency vs. RF-Kit B26

[Adrian]

Thanks Bob, The PSU seems perhaps heavier then than the inbult SPE unit 
then. The SPE total weight is 24 lbs.

I would think the better IMD3 performance would be at the higher voltage 
in the SPE, at the expense of efficiency.

I imagine the KPA1500 has a temperature display, what FT8 session RF out 
power level can it sustain, without exceeding 50 deg C if you know ?


Thankyou


Adrian Fewster

On 12/7/21 2:11 pm, Bob Wilson, N6TV wrote:
> On Sun, Jul 11, 2021 at 7:22 PM Adrian <vk4tux at gmail.com 
> <mailto:vk4tux at gmail.com>> wrote:
>
>     Bob, what are the TX IMD3 specs on the KPA1500 if you know please?
>
>
> They are listed in the ARRL Product Review: 
> http://www.arrl.org/files/file/protected/Group/Members/ProductReview/PROD_REV_0319.pdf 
> <http://www.arrl.org/files/file/protected/Group/Members/ProductReview/PROD_REV_0319.pdf>
>
>     Spurious and harmonic suppression: HF, 62 dB typical, 48 dB worst
>     case (24.9 MHz); 50 MHz, 71 dB.
>
>
>     Third-order intermodulation distortion (IMD): 3rd/5th/7th/9th
>     order products, (dB below PEP at full output): 14 MHz,
>     –30/–40/–48/–58 dB
>
>     The KPA1500 has a transformer supply ?
>
>
> It's a Switching Power Supply in a separate box.  Weighs 17 lbs.
>
> 73,
> Bob, N6TV