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Re: Question about VSWR, SWR, Reflected Power
To: CRTech <crtech@crtech.org>
Subject: Re: Question about VSWR, SWR, Reflected Power
From: "Schmitke, Gregory I" <GISchmitke@unwsp.edu>
Date: Tue, 19 Dec 2017 16:16:59 +0000
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Thread-topic: [CRTech] Question about VSWR, SWR, Reflected Power


You may want to check the scaling/level readout of your VSWR meter.

Your original reading of 1.5 watts and now 0.15 watts would fit a change like that.  

Greg Schmitke,  CBRE                   

Life97.9 / Faith 1200/Faith 89.1


Chief Engineer                               



From: Joey Alcala <jalcala@calvarymiami.com>
Sent: Tuesday, December 19, 2017 9:34 AM
To: CRTech
Subject: Re: [CRTech] Question about VSWR, SWR, Reflected Power
Thanks for the input!

On Tue, Dec 19, 2017 at 9:12 AM, Sherrod Munday <smunday@ieee.org> wrote:
On Tue, Dec 19, 2017 at 8:33 AM, Joey Alcala <jalcala@calvarymiami.com> wrote:
> So my SWR went from 1.5 watts to 0.15 watts over night. I'm super happy
> about this but wondering why it happened? Is it going to go back up again?
> My pastor is asking me questions and I have no idea what to tell him, except
> don;t touch it, maybe it will keep going down haha
> (Our TPO/ Forward power is 190 watts)

Is the forward power still normal?  Can you check to make sure you're
actually putting out that much power and the meter isn't reading out a
false reading?  If you have a dummy load and antenna feedswitch
available, what does your forward and return power look like into a
straight resistive load?

Do you have any weather conditions that are notably different from
yesterday?  Lots of rain, humidity, etc. that could be getting into
the feed line?  Maybe a weep hole opened up and let out standing water
inside something?

Normally such moisture would *negatively* impact the efficiency, but
anything's possible depending on what might be going on...

There's always the temptation to ignore a positive change in your
system's performance, but anytime something changes unexpectedly, it
would be best to thoroughly investigate it to understand what changed
-- because it may change again, and not in the manner that would
necessarily be beneficial.


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Joey Alcala
God's Way Radio / Psalm 18:30
104.7 FM / WAYG-LP
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References: Question about VSWR, SWR, Reflected Power
(Joey Alcala <jalcala@calvarymiami.com>, 19 Dec 2017 13:33:35 -0000)
Re: Question about VSWR, SWR, Reflected Power
(Sherrod Munday <smunday@ieee.org>, 19 Dec 2017 14:13:24 -0000)
Re: Question about VSWR, SWR, Reflected Power
(Joey Alcala <jalcala@calvarymiami.com>, 19 Dec 2017 15:34:39 -0000)
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