[TowerTalk] SWR and voltage

[Gary Schafer]

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 at contesting.com] On Behalf Of
> Richard Solomon
> Sent: Monday, September 26, 2016 10:50 AM
> To: Towertalk at 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 at 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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