[TowerTalk] tuners and power rating

[Steve Hunt]

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 at karinya.net>
> To:<towertalk at contesting.com>
> Sent: Tuesday, November 30, 2010 1:24 PM
> Subject: Re: [TowerTalk] tuners and power rating
>