MFJ 259B Antenna Analyzer Help with traps

Discussion in 'General Technical Questions and Answers' started by N2RIT, Nov 6, 2007.

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  1. N2RIT

    N2RIT Ham Member QRZ Page

    Wonder if anyone can help me with this. I want to make some antenna traps using my mfj 259B. But not sure how to used it as a grid dip meter. Has anyone done this?
    Or just the best way to used this analyzer to make trap.
    I'm just not understanding the manual.

    thanks much
  2. KA4DPO

    KA4DPO Ham Member QRZ Page

    I bought the grid dip kit with mine and it does work although not as well as my old Heathkit GDO does. Simply wind a coil of about 10 turns on a pill bottle and hot glue the windings. Remove the pill bottle and use an RCA plug (phono) to plug into the 259B. It requires a bit more coupling than a Grid dip meter but the SWR meter will dip when you hit resonance.
  3. WJ5O

    WJ5O Ham Member QRZ Page

    Keep in mind that every combination of capacitance and inductance will result in a resonant frequency ...... In series the result will be minimum resistance (reactance) .... in Parallel the result will be maximum resistance (X resonance)........
    I made My forty meter traps to be parallel resonant at 7.200 MHz
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