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Re: [TowerTalk] MF-259B

To: "'Tower and HF antenna construction topics.'" <>
Subject: Re: [TowerTalk] MF-259B
From: "Gary Schafer" <>
Reply-to:, "Tower and HF antenna construction topics." <>
Date: Mon, 15 Mar 2010 12:27:56 -0400
List-post: <">>
Hi Jim,

When measuring inductance with the MFJ you need to use the lowest frequency
that will give a reading. Same when measuring capacitance.

It is sort of intuitive to set it to the frequency that you are making the
coil for but that introduces too many errors, stray capacitance, inductance

I found that it compares favorably with a capacitance/inductance meter if
the MFJ is use in that manor.

Gary  K4FMX

> ## here's   what it  won't do.
> ## it's a dead loss  when measuring inductance and Capacitance.  I Tried
> using it to make tank coils for
> hb linears, and it's out to lunch, not even close.  3 x mfj's  were
> tried.
> ##  I use a B+K  875-B   for accurate L + C  measurements.  Then
> everything is dead on per the spread sheet.
> ##  They warn you not to inject a signal into it, for freq counter
> purposes, if the
> unit is not powered up.  You will damage the unit.
> ##  The optional grid dip coils won't dip anything, even a simple
> parallel resonant circuit.  Several friends also
> commented they too, couldn't grid dip anything.  Even W8JI  says they
> don't work.   I use a real GDO.
> ##  everything else seems to work fairly well on the 259.
> later........ Jim   VE7RF


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