Re: Milliwatts, attenuators and SWR

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From: KB7WW Art Moe (kb7ww@chatusa.com)
Date: Sun Dec 31 2000 - 20:42:18 CST


Goran,
What I do here is use a antenna tuner (JOHNSON match box) to bring
the VSWR down to 1:1 and set the power to just below 100 Mw with
my OHR WM1, then I add attenuators as needed via a in out relay.

Art
KB7WW

Goran Hosinsky wrote:
>
> Hi,
> I would like to to be able to do milliwatting with my K2 and one
> way seems to be using calibrated attenuators to bring down the power.
> If the antenna is a pure 50 ohm I could have a nice, calibrated
> output at any level I want using a RF probe to measure the voltage.
> In real life I have SWR of about 1.6:1 at the input to the coax.
> If my calculations are correct that means than my transmitted
> power could be anywhere between 600 mW and 1.6 W when I measure
> 1.0 W. How do you people resolve this problem?
>
> Happy New Year
> Goran ea8yu La Palma island


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