Topband: Toploaded vertical - SWR

[Clive GM3POI]

What I don't understand is why would you use more components than needed.
Why a capacitor (possibly vacuum). What is wrong in using a hairpin which
also DC shorts the vertical to ground.  A combination of hairpin size and
top loading will give you 1:1 at your favourite 1.825 or anywhere else.
Perhaps WX0B's article needs a reprint in the NCJ. It really is simple just
a few microhenries of inductance and you are done.
73 Clive GM3POI  

-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Don Kirk
Sent: 19 September 2018 17:29
To: Herbert Schoenbohm
Cc: topband; ash.kf5eyy at gmail.com
Subject: Re: Topband: Toploaded vertical - SWR

>
> Herb (KV4FZ) mentioned an L network, and that is what I always use.  Very
> simple, and you just plug you're measured complex impedance values (at the
> frequency you want to be resonant) into one of the many online L network
> calculators to determine the amount of inductance and capacitance required
> for the L network.  I normally just wind my own coil for the inductance,
> and use high voltage silver mica caps for the capacitor.
>
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