Andy:
Sometime ago, there was an extensive thread regarding the mcount cw read out
device that could be interfaced with any VFO circuit or BFO circuit.
The folks who designed the mcount, not MFJ, used it to interface to the
MFJ209, which is an analogue antenna analyzer with an output jack for an
external frequency counter.
They hook up the Mcount to the frequency counter output of the analyzer, and
the device reads out the resonant frequency when it is reached. Another
small modification is a tone device which you can use to find the aproximate
resonant frequency by nulling the tone out and then reading that frequency
with the Mcount.
Very similar to the LDG tw1 and 2, where you use a tone to find the lowest
SWR or highest power.
On the MFJ 209, the resonant frequency is found by turning a knob until the
meter shows a flat swr. You have to manually select the band or frequency
range. Most modern meters made by MFJ have digital meters that show the
resonant frequency automatically, thus making it difficult to use an
outboard analogue frequency counter like the Mcount.
The tone circuit that is added to the 209 allows you to find the resonant
frequency with the knob, the spot where the tone disappears, and then read
it with the mcount via CW.
Apparently it will work with other MFJ analyzers, but the interface is more
complex since most do not have direct outputs for external freq counters.
The 209 has an RCA jack on it for an external counter.
So, the long answer to your question is, I have no idea. Unless the
European version of the MFJ209 is the MFJ993B.
If you have some method of tapping the BFO on a device, then you can use the
mcount to read the frequency.
73
Colin, V A6BKX
----- Original Message -----
From: "andy m0ceg" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, March 07, 2007 2:04 PM
Subject: Re: mfj analyzer
> Hello Colin, Long time no here from? In this email you mention a CW
device
> I take it from MFJ, does this work with any of the antenna units like the
> MFJ 993B?
> ----- Original Message -----
> From: "Colin McDonald" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Wednesday, March 07, 2007 7:52 PM
> Subject: Re: mfj analyzer
>
>
> > no, there was no mention on this list of QST doing a product review of
the
> > MFJ209.
> > Not sure why they would since I thought they only review relatively new
> > products, which the 209 is not.
> > However, there was mention of the article regarding the CW read out
device
> > (the mcount) interfaced with the MFJ209 to give frequency readings. As
> > well
> > as the other component to emit a tone to find the lowest SWR point.
> > 73
> > Colin, V A6BKX
> > ----- Original Message -----
> > From: "Richard Fiorello" <[log in to unmask]>
> > To: <[log in to unmask]>
> > Sent: Wednesday, March 07, 2007 9:56 AM
> > Subject: mfj analyzer
> >
> >
> >> Hi everyone;
> >> Was there a post a few weeks ago suggesting that qst was doing a
product
> >> review for the mfj 209 analyzer? I've taken a look at recent product
> >> reviews and didn't see anything.
> >> Richard
> >>
> >>
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> > 9:24 AM
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>
>
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9:24 AM
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>
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