Paul,
The only calculator I fully trust is Owen's (VK1OD). For 10ft or RG213
terminated in 150+j130 at 3.5MHz, his calculator gives a loss of
0.0138dB compared to a matched loss of 0.0351dB.
Of course, if you want to think in terms of "the loss attributed to
SWR", in that scenario it would have to be a negative figure and
therefore appear as "gain". But as I said before, I believe that phrase
is unhelpful because it implies that a non-unity VSWR must always
introduce extra loss, whereas we know that isn't true!
73,
Steve G3TXQ
On 30/11/2010 18:43, Paul Christensen wrote:
> Thanks Steve. That makes perfect sense. What's a mystery is why the loss
> attributed to SWR under that condition shows as a negative value in TLD,
> albeit a small amount. The inverse of loss is...well, gain!
>
> Paul, W9AC
>
> ----- Original Message -----
> From: "Steve Hunt"<steve@karinya.net>
> To:<towertalk@contesting.com>
> Sent: Tuesday, November 30, 2010 1:24 PM
> Subject: Re: [TowerTalk] tuners and power rating
>
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