Ok many thanks for this Colin, 73,
----- Original Message -----
From: "Colin McDonald" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, March 07, 2007 10:12 PM
Subject: Re: mfj analyzer
> 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
>> >>
>> >>
>> >> --
>> >> No virus found in this incoming message.
>> >> Checked by AVG Free Edition.
>> >> Version: 7.5.446 / Virus Database: 268.18.7/713 - Release Date:
> 3/7/2007
>> > 9:24 AM
>> >>
>> >>
>> >
>> > __________ NOD32 2101 (20070307) Information __________
>> >
>> > This message was checked by NOD32 antivirus system.
>> > http://www.eset.com
>> >
>> >
>>
>>
>> --
>> No virus found in this incoming message.
>> Checked by AVG Free Edition.
>> Version: 7.5.446 / Virus Database: 268.18.7/713 - Release Date: 3/7/2007
> 9:24 AM
>>
>>
>
> __________ NOD32 2102 (20070308) Information __________
>
> This message was checked by NOD32 antivirus system.
> http://www.eset.com
>
>
|
