[Elecraft] Tuner Loss question

[tom armour]

Why do you need to know the loss of the tuner?  Put a power meter after the tuner and see what your rig is putting out.  
Is this the type of chart you are looking for?http://www.packetradio.com/pdfzips/SWRvsPowerNwatts.pdf
It is not really the tuner that is causing the loss.  It is more the feed line.  
You can test this by using an external tuner and placing a watt meter both in front and behind the tuner and see what kind of loss you are getting.
Yes the tuner will have loss, but relatively negligible.

73 - Tom - wa4ta

> Date: Tue, 11 Feb 2014 11:47:19 -0600
> From: jvandrey at gmail.com
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] Tuner Loss question
> 
> I have lots of data in the loss to be expected in Coax or Open wire when
> running at higher SWR into a multiband antenna  - however, I do NOT have
> any real world data on the losses to be expected in a tuner system at
> higher SWR.
> 
> So:
> 
> Are there any numbers available on what additional losses my Elecraft K3
> (SN 5283) antenna tuner will experience when the SWR is high - say about
> 5:1 or higher when feeding a multiband antenna with 50 Ohm coax on 20
> meters?  Should I expect another 3 dB down in signal strength during
> receive - and also Transmit?  Or are the losses higher or lower then that?
>  Also, are the losses frequency dependent (like on coax) or are they the
> same across the bands.
> 
> Thanks for any available data.
> 
> Jobst
> AC0LP
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