Is that true/necessary for all 2:1 SWR's?
----- Original Message -----
From: "Ben K8DIT" <benk8dit@serv.net>
To: <tentec@contesting.com>
Sent: Tuesday, October 14, 2003 02:38
Subject: Re: [TenTec] Rudimentary Jupiter SWR question...
> Yes, but will anyone hear you? Doubt it beyond 50-100 miles away. In
theory
> you could go 2:1 all day providing you have a fan on the heatsink. Above
> that and you risk the thermal shutoff taking you off the air
involuntarily.
> Finals today are supposed to be fairly robust, but why test them beyond
what
> the heatsink will dissipate? If you do this, or say use a tuner to tune
out
> the swr, you are heating up some other part of the feedline or antenna.
The
> remaining rf energy will not happily radiate off into the ether since
there
> is still the problem of complex impedances, ground losses and radiation
> resistance impeding your successful attempt at communicating.
> Unless your antenna is fairly happy radiating on 160, meeting all the
> requirements to resonate/radiate your energy, then any of several factors
> will be eating your lunch. While you may be able to hear loud signals from
> others, your transmitted signal will be dramatically attenuated to the
point
> where he may just be barely able to hear you, if he even notices you are
> there. This is a fairly common mistake newcomers to the top band make.
> Radiation characteristics are way different on 160. Havent you asked
> yourself, if this were easy, wouldnt everyone be doing it? I took me over
a
> decade before I found a satisfactory answer to my particular situation.
Its
> a 290' inverted L with an L network tuner remotely tuned on the feedpoint.
> The antenna and tuner are homebrew.
>
>
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