I had a friend try and build me this thing and he hasn't been able to 
make it work.  He brought it out last summer and we went over the 
circuit and can't find anything wrong.  We've tried different chips and 
it just won't work.  He still has it, but I don't hold out much hope.
73
Butch
WA0VJR
Node 3148
Wallace, ks.


On 
Fri, 27 Jun 2014, Gary Lee wrote:

> There is just such a schematic for the mfj209 in the february 2007 qst.
>
> I approached Dr. Jue of mfj at dayton about making this an add on for the
> 209.  Will get back with him next week and see what the progress is.
>
> ----- Original Message -----
> From: "Gary Tillinghast" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Friday, June 27, 2014 1:24 PM
> Subject: Re: Gotta love them analizers!
>
>
>> Thanks for the thoughts Eric.  To have a analyzer giving input to a
>> computer
>> through a interface cable, means I need to drag along another piece of
>> equipment to read the display. I would perfer to have it stand alone.   If
>> it is so simple, couldn't one make a schematic and some of could build
>> these?  Gary KB2YAA
>>
>> -----Original Message-----
>> From: Eric Oyen
>> Sent: Friday, June 27, 2014 6:28 AM
>> To: [log in to unmask]
>> Subject: Re: Gotta love them analizers!
>>
>> well,
>> considering that most of the antenna analyzers contain 3 elements of =
>> concern to us, its relatively simple to design 1 or 2 accessibility =
>> solutions.
>>
>> the first is a simple VCO (voltage controlled oscillator). This would be =
>> for use with the 2 meters on board (the reactance meter and the SWR =
>> meter)
>> the second would be a simple programmable voice chip/interface that =
>> would read from the frequency display input lines. Considering there =
>> would be 6 total digits and 3 decimal point locations, this makes the =
>> speech interface rather a lot simpler than what one has to do with a =
>> screen reader. If Braille cells didn't cost as much as they do, creating =
>> a tactile frequency display for the unit would be inexpensive. all you =
>> would need would be to translate a-j and the decimal point. that would =
>> be a 7 cell interface with only the absolute minimum of hard wired =
>> programming (in an Eprom). or, if the braille display idea is too =
>> complex, using the same Eprom and some low bit recorded voice and a BCD =
>> decoder (7 segment displays are Binary coded decimal where a display =
>> will have 12 possible states where 00000000 =3D off and and each segment =
>> pattern will have a specific value). I can compile a simple table =
>> displaying how this could be done using binary states if anyone wants =
>> it.
>>
>> Since we are not concerned with accuracy lower than 1 Khz, this makes =
>> the idea of building a hardware speech interface pretty simple.
>>
>> Now, some of the newer units have a USB interface, and a program to read =
>> that data from the device, with a little programming know-how, one could =
>> use jaws on windows or some other screen reader (voiceover on mac, orca =
>> or one of the dozen other open source screen readers on Linux).
>>
>> there are several possible solutions here, some of them fairly cheap.
>>
>> Ideas, suggestions, comments?
>>
>> -eric
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
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>
>