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Re: [Amps] SWR and amplifiers

To: Bill Turner <dezrat@xxxxxxxxxxx>
Subject: Re: [Amps] SWR and amplifiers
From: Vic Rosenthal <k2vco.vic@xxxxxxxxx>
Date: Thu, 25 May 2017 10:34:57 +0300
List-post: <mailto:amps@contesting.com>
No, your forward power reading is not the power that will be delivered to the 
antenna less losses.   That is only the case with a 1:1 SWR. In any other case, 
the forward power reading of the usual SWR meter includes the reflected power.

Vic 4X6GP 

> On 25 May 2017, at 5:32, Bill Turner <dezrat@xxxxxxxxxxx> wrote:
> 
> ------------ ORIGINAL MESSAGE ------------(may be snipped)
> 
>> On Thu, 25 May 2017 10:12:20 +0800, VK6APK wrote:
>> 
>> 
>> No. Read it again. Ron was saying that 100% of the 1000 Watts, minus the 
>> compounded resistive losses is going out into space. Those losses would 
>> NOT amount to 100 Watts of dissipation.
>> 
>> Therefore, with your superconductor feedline, as there are no esistive 
>> losses, 100% of the 1000 Watts will be radiated.
> 
> REPLY:
> 
> If I understand you correctly, my 100 watts of reflected power is only
> important because it increases feed line loss, correct? With a
> lossless feed line the reflected power is still present but does no
> harm other than affecting the impedance at the feed point?  Correct so
> far? 
> 
> So when my SWR meter shows 1000 watts forward power, that really is
> the true output of the amplifier before losses in the feed line are
> taken into account, correct?  It's starting to make sense. 
> 
> 73, Bill W6WRT
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