Funny K4 Story i.e. SWR

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Funny K4 Story i.e. SWR

Bob McGraw
Most all SWR meters relative instruments.  Meaning they provide an
indication in terms of ratio of one value of voltage to another value of
voltage.  Thus better described as VSWR indication.

As to measurement of power, most all are calibrated to operate in a 50
ohm circuit.  Departure from 50 ohms, where one uses the power
indication post tuner, will yield an error which is sometimes
significant, in the power indication.

73

Bob, K4TAX

Message: 10
Date: Tue, 18 May 2021 08:44:01 -0700
From: Tom Azlin W7SUA<[hidden email]>
To:[hidden email]
Subject: Re: [Elecraft] Funny K4 Story
Message-ID:<[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

I have an external meter on each of my antenna feedlines so I know the
actual SWR for each antenna. Also see a difference in the reported power
out on my (still) K3 versus the power reported on the external SWR/PWR
meter.

Tom w7sua


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Re: Funny K4 Story i.e. SWR

wa6vab
I Though it was 52 Ohms ?  

WA6VAB   Ray K3 #3824

From: Bob McGraw
Sent: Wednesday, May 19, 2021 1:43 PM
To: [hidden email]; [hidden email]
Subject: [Elecraft] Funny K4 Story i.e. SWR

Most all SWR meters relative instruments.  Meaning they provide an
indication in terms of ratio of one value of voltage to another value of
voltage.  Thus better described as VSWR indication.

As to measurement of power, most all are calibrated to operate in a 50
ohm circuit.  Departure from 50 ohms, where one uses the power
indication post tuner, will yield an error which is sometimes
significant, in the power indication.

73

Bob, K4TAX

Message: 10
Date: Tue, 18 May 2021 08:44:01 -0700
From: Tom Azlin W7SUA<[hidden email]>
To:[hidden email]
Subject: Re: [Elecraft] Funny K4 Story
Message-ID:<[hidden email]>
Content-Type: text/plain; charset=utf-8; format=flowed

I have an external meter on each of my antenna feedlines so I know the
actual SWR for each antenna. Also see a difference in the reported power
out on my (still) K3 versus the power reported on the external SWR/PWR
meter.

Tom w7sua


______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
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