[K3CAL] MFJ-259B Calibration

[Jim Tetlow]

Yes indeed, Microsoft shows the ohm symbol while apple shows watt. Amazing, Shawn you must have one of those special keyboards too.

 

Best Regards,

Jim Tetlow

jimtetlow at chesapeake.net

 

From: k3cal-bounces at mailman.qth.net [mailto:k3cal-bounces at mailman.qth.net] On Behalf Of N3AE
Sent: Sunday, May 19, 2013 1:02 PM
To: Calvert Amateur Radio Association - K3CAL
Subject: Re: [K3CAL] MFJ-259B Calibration

 

Ron,

 

I think we have a browser issue.  In my original post, the resistor values have the Greek symbol Omega after them (Ohms).  Your browser may have translated to the letter W.

 

Shawn

  _____  

From: "Wa4prr" <wa4prr at comcast.net>
To: "Calvert Amateur Radio Association - K3CAL" <k3cal at mailman.qth.net>
Sent: Sunday, May 19, 2013 2:19:22 AM
Subject: Re: [K3CAL] MFJ-259B Calibration

Shawn, don't you mean OHM instead of Watt loads?  73,

Ron Byzet / WA4PRR - Sent from my iPad


On May 18, 2013, at 6:29 PM, N3AE <n3ae at comcast.net> wrote:

Someone from the club asked me about an article I found on how to calibrate a MFJ-259B antenna impedance meter.   Unfortunately, I forgot who asked me.  Sorry to bother you if you're not interested.

 

The procedure can be found at http://www.mfjenterprises.com/pdffiles/MFJ-259B_Calibration.pdf

 

Also at http://www.w8ji.com/mfj-259b_calibration.htm

 

The procedure requires some high accuracy loads constructed with 1% non-inductive resistors and PL-259 connectors.  I bought the parts (connectors and 1% resistors) but have not put them together yet.

 

Loads needed:

 

A.   Short

B.     12.5-W load

C.    50-W load

D.    75-W load

E.     100-W load

F.     200-W load

 

 

 

Shawn - N3AE

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