Perfect fit metal box for 30m OpenBeacon xmtr board

Crystal-controlled QRPp beacon transmitter kit

Perfect fit metal box for 30m OpenBeacon xmtr board

Postby WA4KBD » Wed Jul 11, 2012 1:50 am

I found a metal box on eBay that's a perfect fit for the 30m OpenBeacon xmtr board. It's box number 1166 from 'rfsupplier' and costs $7.74 out of China with shipping. It has a built-in circuit board slot that is a firm though not excessively tight fit. The box is 0.7 inches or so longer than the board, so a small circuit board shim can be used from the rear of the OpenBeacon board to the rear of the case. This will prevent the board from moving when cables are inserted or removed.

Prior to using this box, I was noticing some frequency drift and FSK keying waveform irregularities on my signal. These completely disappeared when I enclosed the board inside! A photo of my unit can be seen at this URL: www dot wa4kbd dot net/openbeacon.html

The metal front and rear panels of this box are rather thin and easy to drill / file. Love mine. Enjoy...
Here is the eBay link:
http://www.ebay.com/itm/Aluminum-Projec ... 6rk%3D1%26

73,
Bill, WA4KBD
Last edited by WA4KBD on Wed Jul 11, 2012 9:04 am, edited 1 time in total.
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Re: Perfect fit metal box for 30m OpenBeacon xmtr board

Postby NT7S » Wed Jul 11, 2012 6:27 am

Wow, that's beautiful! And such an excellent find, great job! May I mention this on my blog and link to your page?

Thanks,
Jason NT7S
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Re: Perfect fit metal box for 30m OpenBeacon xmtr board

Postby WA4KBD » Wed Jul 11, 2012 8:17 am

Sure, Jason. Post the link and blog away!
Here is the actual eBay link:
http://www.ebay.com/itm/Aluminum-Projec ... 6rk%3D1%26
73,
Bill,WA4KBD
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Re: Perfect fit metal box for 30m OpenBeacon xmtr board

Postby ab2ts » Sun Oct 21, 2012 5:36 pm

Would you post dimensions for the front panel cutouts??
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Re: Perfect fit metal box for 30m OpenBeacon xmtr board

Postby NT7S » Sun Oct 21, 2012 10:27 pm

ab2ts wrote:Would you post dimensions for the front panel cutouts??


Yes, I certainly will do that soon. I've got some prototype enclosures in-hand, and I'm working on the CAD drawings for the front panel cutout right now. I'll have the CAD drawing up on the documentation site after I get back my finished end panels, which will be in a few weeks.

Thanks,
Jason NT7S
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Re: Perfect fit metal box for 30m OpenBeacon xmtr board

Postby geppetto » Mon Oct 22, 2012 8:37 am

Bill
Thanks for the heads up on the box...


Philip G4JVF
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Re: Perfect fit metal box for 30m OpenBeacon xmtr board

Postby ab2ts » Fri Nov 02, 2012 6:12 am

Watch out for the banded end of D4. It is very close to shorting to the box. Cut it very short and DO NOT sand that edge of the board.

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Re: Perfect fit metal box for 30m OpenBeacon xmtr board

Postby N2AIE » Sat Nov 03, 2012 9:17 pm

Hi all,

I bought the box..
I do have to say that it is very nice.
I did have to dremel sand down the sides to actually get it to fit, but not much.

I did cut the holes for the USB/BNC/Power and a few LEDs...
On a buisness trip, so have more work to do on it..
Thinking of moving frequench trim to the back of the case.

Question: I'm having problems getting it to xmit on WSPR..i did the whole conversion to get my call etc..it seemed that it loaded, but nada..

N2AIE
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Re: Perfect fit metal box for 30m OpenBeacon xmtr board

Postby ab2ts » Mon Nov 19, 2012 3:32 am

These are very good boxes... The covers are a bit soft so you will need a very sharp drill bit. Use a center point and use increasingly larger bits. The very soft material has the amazing ability to make the drill bit walk away from the point you want to drill. On the plus side it is very easy to shape with a file.

Mike
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