Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

LF: RE: RE: Scopematch question

To: <[email protected]>
Subject: LF: RE: RE: Scopematch question
From: "Clemens Paul" <[email protected]>
Date: Sat, 1 Jul 2017 18:25:20 +0200
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Thread-index: AdLybTwMtpAdsm73SPy7bUjAaeOXpAAFaNHgAADhGMA=
Forgot to mention that with with electrically small antennas R nearly stays 
constant around resonance.

73
Clemens
DL4RAJ  

>-----Original Message-----
>From: [email protected] 
>[mailto:[email protected]] On Behalf Of Clemens Paul
>Sent: Saturday, July 01, 2017 6:18 PM
>To: [email protected]
>Subject: LF: RE: Scopematch question
>
>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 +X^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.
>
>73
>Clemens
>DL4RAJ 
>
>
>>-----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.
>>http://www.avg.com
>>
>
>



<Prev in Thread] Current Thread [Next in Thread>