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]
>>
>>
>>
>>---
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>>
>
>
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