[Elecraft] KPA500 Coax size requirements

[David Bunte]

Carter -

I run my KPA500 from the 120v outlet in my shack. I have done so for years
with no problems. I use LMR400 coax, but I know several folks who use RG8-X
with the KPA500, even on very long runs and some with amps putting out 1000
to 1500 watts. The better your antenna the less of a problem with that. If,
however, your antenna has a very high SWR without the use of the KAT500
tuner, then the tuner will make the rig happy, but there will still be SWR
loss on the coax, and it will be greater with RG8-X than with a larger and
lower loss coax.

Best of luck.

73 de Dave - K9FN

On Tue, Aug 20, 2019 at 3:20 PM Carter Craigie <carterwc128 at gmail.com>
wrote:

> Hello friends,
>
> I am contemplating buying a KPA500 amplifier/tuner Combo, and driving it
> from my Elecraft K2/100 rig. I hope I would be able to do that!
>
>  From what I have read on eHam Reviews, it appears that I can run the
> amp/tuner combo on 117v. from the convenient wall socket. Is that correct,
> as well?
>
> I cannot find any mention of the coax requirements, from the radio/combo
> out to our 80-meter wire loop antenna. Right now, using only my K2/100 I am
> able to use  8X coax.
>
> Will I still be able to use that coax cable with up to 500 Watts output?
>
> What other considerations do I need to make?
>
> Thanks in advance,
>
> Carter Craigie, N3AO
> Blacksburg, VA
>
>
> --
> Carter, N3AO
> Blacksburg, VA
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