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LF: RE: Scopematch question

To: <[email protected]>
Subject: LF: RE: Scopematch question
From: "Clemens Paul" <[email protected]>
Date: Sat, 1 Jul 2017 18:18:10 +0200
In-reply-to: <[email protected]>
References: <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Thread-index: AdLybTwMtpAdsm73SPy7bUjAaeOXpAAFaNHg
Hi Chris,

At a given power into a load voltage increases at the sqrt of increasing R 
because U = sqrt(P*R).
When a complex load comes into play V increases with |Z| which is sqrt (R^2 
So at resonance,i.e. w/o any reactance |Z|( now =R) has the lowest possible 
value because X=0 .
Your antenna-feeder tuner system has a very high loaded Q (causing the very 
small bandwidth).
Hence X (inductive or capacitive) increases very rapidly off resonance and 
therefore voltage too.


>-----Original Message-----
>From: [email protected] 
>[mailto:[email protected]] On Behalf Of Chris Wilson
>Sent: Saturday, July 01, 2017 3:22 PM
>To: [email protected]
>Subject: LF: Scopematch question
>Hello rsgb,
>My scopematch setup appears to work as intended and into a good
>quality dummy load of 50 Ohms impedance the volts and amps traces sit
>perfectly upon one another. If my antenna is even SLIGHTLY off
>resonance the volts trace level increase substantially. Is this
>because the off resonance antenna is getting less current, but more
>volts into it? I am not 100% sure of the correlation between volts
>shown and resonance, if someone could briefly explain I'd appreciate
>it, thanks. 2E0ILY
>Best regards,
> Chris                          mailto:[email protected]
>Diese E-Mail wurde von AVG auf Viren geprüft.

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