[TowerTalk] Reactance at end of feedline

[Pete Smith N4ZR]

Hi Paul - no, the MFJ does not give you the sign, just R and un-signed X.

73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
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On 10/7/2013 8:23 AM, Paul Christensen wrote:
> Pete,
>
> Does your MFJ 259B separate out reactance and provide the sign 
> (complex R+jX rather than only Z magnitude)?   I thought some MFJ 
> models only read magnitude of the impedance.
>
> If the 259B reads complex Z, did you observe a point where reactance 
> went from one sign to the other as it crossed zero?  If we knew the 
> feedpoint Z and type of line (we know the line length), we could then 
> easily calculate the Z at the input end of the line, including sign of 
> the reactance and compare it against your results.
>
> Paul, W9AC
>
> ----- Original Message ----- From: "Pete Smith N4ZR" 
> <n4zr at contesting.com>
> To: "TowerTalk" <TowerTalk at contesting.com>
> Sent: Monday, October 07, 2013 7:53 AM
> Subject: [TowerTalk] Reactance at end of feedline
>
>
>> Us history majors sometimes need to ask elementary questions, so 
>> please be kind.
>>
>> Yesterday I was refurbishing my 80M lazy-vee dipole array, measuring 
>> the center frequencies to adjust as needed.  On my MFJ259B, the 
>> reactance at the end of the 88-foot feedlines reached a minimum of 
>> only about 45 ohms before starting back up.  Does this value reflect 
>> the inductive reactance of the feedline?
>>
>>
>> -- 
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network at
>> http://reversebeacon.net,
>> blog at reversebeacon.blogspot.com.
>> For spots, please go to your favorite
>> ARC V6 or VE7CC DX cluster node.
>>
>> _______________________________________________
>>
>>
>>
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