Message-ID: <561D2906.4000406@posteo.de>
Date: Tue, 13 Oct 2015 17:53:42 +0200
From: DK7FC <selberdenken@posteo.de>
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To: rsgb_lf_group@blacksheep.org
References: <1541636554.20151013163425@chriswilson.tv>
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Subject: Re: LF: Should I be aiming for a better match than this?
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Status: O

Hi Chris,

Just adjust for a maximum antenna current. This should be at resonance 
(U in phase with I), unless you're using a class E PA :-)

73, Stefan

Am 13.10.2015 17:34, schrieb Chris Wilson:
> 13 October 2015
>
>
> Got my (brave...) friend adjusting the variometer in real time whilst
> I talked to him by phone, and whilst transmitting at one setting below
> full power. I watched the `scope in the shack for best results. Is
> this an adequate match or should I get better than this? I think it's
> a resistive mismatch that's showing? It's a pain not having a colour
> scope but I am pretty sure it's amps leading volts being shown here.
> On full power the amp trips out, not sure if it's SWR mismatch or
> current overload. Will need to check that out. No arcing at the
> matching and loading coils though.
>
> http://www.chriswilson.tv/best-match.jpg
>
>
> I  built  the  Jim  Morittz  scopematch  using  the  capacitive divider
> circuit, can i work out the antenna current from this? Thanks.
>
> 2E0ILY
>
>
>
>