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preston MDR 3 board query


joe mcnally

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Just wondered if anyone knows of or has one of these boards sitting around they could photo please

Im just trying to put this board into an MDR 2

The board was given to me with the aerial mounting separated from the board and now I have no reference to where or what the centre pin of the aerial connects to :(

Any help greatly appreciated

All best

Joe

post-158-0-77545000-1419704273_thumb.jpg

post-158-0-50183400-1419704292_thumb.jpg

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  • 3 weeks later...
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Hello Joe:

 

I have images for you and can email them direct to you as I cannot seem to get them to upload here on the forum.

 

You will have to solder to the Centre Pin of the RF connector to the centre PCB Board land and not the ones that are close by on either side.

 

Also, what is the easiest method for uploading images on the forum for next time ? I tried to Image to URL converters that are free

online but the Forum would not allow the extensions.

 

Marc

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Marc, when I posted the pics above I started a new topic and a box at the bottom asks if you want to add files I just pressed there and it goes straight to my computer files then I chose the MDR board and that was it simple

When replying like now there is no dialogue for that so may you could just start a new topic MDR pics Topic :)

Cheers

Joe

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Thanks Alan, it worked using Imgur.com

 

Joe,

 

See the trace that goes to the 6 pin RF Filter labelled FLT1 that is your RF Connection point.

 

You will have to solder to the Centre Pin of the RF connector to the centre PCB Board land and not the ones that are close by on either side.

 

I pulled the SMA connector so that you can get a better view of the PCB land that you will have to attach to.

 

Just remember that we are at 2.4Ghz here so take care both not for overheat the trace as well as NOT placing a large solder blob at the connection point as both will lead to RF impedance mis-match and could decrease your range. You probably will get away with it somewhat seeing as the PCB is a fiberglass FR4 0.062" which works ok at these frequencies.

 

 

 

9cLnY1p.jpg

 

 

 

 

 

 

m1OYYoe.jpg

 

( Please disregard the Capacitor above the label L41. fixed that after I took the photo )

 

Hope that this does help.

 

Marc

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Hi Marc

that picture and info was indeed very helpful

Just spent a fun hour or so doing what you suggested and all seems to working as it should now ..... really happy and great this forum has such helpful members

Hope I can help too as we go along

All very best

Joe McNally

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