Date: Mon, 24 Jul 2017 11:33:46 +0100
From: Chris Wilson <dead.fets@gmail.com>
Message-ID: <437231277.20170724113346@gmail.com>
To: Clemens Paul <rsgb_lf_group@blacksheep.org>
In-Reply-To: <3D981576F1544C5CAA9F9D2AABB45304@Clemens0811>
References: <1478421187.20170701142226@gmail.com> <3D981576F1544C5CAA9F9D2AABB45304@Clemens0811>
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Subject: Re: LF: RE: Scopematch question
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Hello Clemens and Alan (Melia),

Sorry  for  very late reply, I have not had access to my GMAIL account
for  a  while  and it's the only one Blacksheep do not bounce my mails
from.  A great reply and I see your addition as well, I understand now
why  the  traces behave as they do off resonance, appreciated!! Thanks
to  all  the  excellent  and patient help from the LF forums I seem to
have finally achieved a reliable and pretty good TX set up for 136kHz,
and more than that I believe I have a much better understanding of how
everything  works  and ties in together, which is immensely satisfying
considering  every  element is home built and far more pleasing to use
than some black box  for HF :) 73 everyone!


Saturday, July 1, 2017, 5:18:10 PM, you wrote:

> 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 


-- 
Best regards,
 Chris                            mailto:dead.fets@gmail.com