Line V(Peak) = [sq. rt. (Pwr*system Z*SWR)]* 1.414
Paul, W9AC
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Gary
Schafer
Sent: Monday, September 26, 2016 1:35 PM
To: 'Richard Solomon' <dickw1ksz@gmail.com>; Towertalk@contesting.com
Subject: Re: [TowerTalk] SWR and voltage
No, there is no such thing as peak to peak except on the scope screen.
You want to use peak values to figure the protector voltage.
73
Gary K4FMX
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
> Richard Solomon
> Sent: Monday, September 26, 2016 10:50 AM
> To: Towertalk@contesting.com
> Subject: Re: [TowerTalk] SWR and voltage
>
> Wouldn't Peak to Peak values be needed ?
> In which case the multiplier is ~2.8.
>
> 73, Dick, W1KSZ
>
> On Mon, Sep 26, 2016 at 8:42 AM, Steve Hunt <steve@karinya.net> wrote:
>
> > Steve,
> >
> > Those were rms figures of course; if you need peak values, multiply
> > by
> > 1.414
> >
> > Steve G3TXQ
> >
> >
> >
> > On 26/09/2016 16:38, Steve Hunt wrote:
> >
> >> Steve,
> >>
> >> Firstly your figures are out for the 50 Ohm system; the figures are
> >> 273.9V and 5.5A
> >>
> >> Once the SWR is no longer 1:1, there is an infinite range of
> impedances
> >> for any particular SWR, and therefore an infinite range of voltages
> and
> >> currents for a dissipation of 1500W. However, here are the upper
> >> and
> lower
> >> limits:
> >>
> >> 2:1 SWR: 387.3V / 3.9A thru 193.6V / 7.7A
> >>
> >> 3:1 SWR: 474.3V / 3.2A thru 158.1V / 9.5A
> >>
> >> Steve G3TXQ
> >>
> >>
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