[TowerTalk] SWR is what SWR meter measures

[Jim Lux]

----- Original Message -----
From: "K4SB" <k4sb at bellsouth.net>
To: <TowerTalk at contesting.com>
Sent: Thursday, May 12, 2005 9:56 PM
Subject: Re: [TowerTalk] SWR is what SWR meter measures


> Jim Lux wrote:
> > With a 2:1 mismatch at the far end the return loss is 10 dB. This is
> > another way of saying that for every 1000 watts you send to the antenna,
> > 100 watts is reflected back towards the transmitter.  The radiated power
is
> > reduced from 1000W to 900W (about 0.5 dB decrease)
> >
> > With 1.2:1, the return loss is 26.4 dB: only 2.2 Watts gets reflected
back.
> > (0.01 dB decrease).
>
> 26.4 db at 1.2:1? Not to mention the 10 db.
>
> ):>
> Ed
>
OK, so I was inconsistent in my rounding and reading off the chart.. 10dB
return loss is actually about 1.9:1 VSWR.  2:1 is more like 9.5 dB RL.