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
>
|
