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 Post subject: DSP-610 Photos
PostPosted: Fri Aug 03, 2012 5:44 pm 
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Joined: Fri Aug 03, 2012 5:35 pm
Posts: 36
Jim (and All):
Please post photos illustrating physical construction details. I'm particularly interested in seeing the underside of the board, and how you heatsinked the power components.
Thanks,
--Marc


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 Post subject: Re: DSP-610 Photos
PostPosted: Sat Aug 25, 2012 8:44 am 
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Joined: Thu Aug 23, 2012 1:24 pm
Posts: 23
I am also interesting in seeing the details of the heat sinking and the shield.


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 Post subject: Re: DSP-610 Photos
PostPosted: Sat Aug 25, 2012 11:27 pm 
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Joined: Mon Jul 23, 2012 6:25 am
Posts: 1142
I'm adding photos to the WIKI at https://sites.google.com/site/dsp610constuction/

more all the time.


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 Post subject: Re: DSP-610 Photos
PostPosted: Mon Aug 27, 2012 10:24 pm 
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Joined: Thu Aug 23, 2012 1:24 pm
Posts: 23
The photo of the underside of the main board was great. How do you envision doing the heat sinking on the PA board? I received my PA board today and immediately noticed the big holes near the transistor pads but don't have enough imagination or experience to figure out what's supposed to be done.

BTW, thanks for this great project!

73,
Bob


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 Post subject: Re: DSP-610 Photos
PostPosted: Tue Aug 28, 2012 3:47 pm 
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Joined: Tue Aug 07, 2012 7:31 pm
Posts: 12
Bob,

The holes in the board are to provide acces to mount the RD16HHF1 transistors to the heatsink and top cover. Bend the transistor leads 90 degrees such that the holes in the transistors line up with the holes in the board. You will now have access to run your hardware and tools through the board and mount the transistors to the heatsink and top cover. Still use standoffs at the corners to mount the board to the cover.

Cheers
Barry


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 Post subject: Re: DSP-610 Photos
PostPosted: Wed Aug 29, 2012 12:28 pm 
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Joined: Mon Jul 23, 2012 6:25 am
Posts: 1142
Thanks, Barry, good answer.

It's the same design the we use in the Hardrock-50 it allows the PCB to be mounted 1/4" off a flat surface, in this case the lid of the enclosure. We'll need to use a flat sided heatsink of some type on the top to deal with the heat.

Jim.


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 Post subject: Re: DSP-610 Photos
PostPosted: Thu Aug 30, 2012 8:22 pm 
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Joined: Thu Aug 23, 2012 1:24 pm
Posts: 23
Thanks very much, Barry and Jim. I'm completely new to this homebrew stuff although I do have a fair amount of (old) kit building experience. I appreciate you guys taking the time to explain what may seem obvious to others.

73,
Bob KD2UJ


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 Post subject: Re: DSP-610 Photos
PostPosted: Thu Aug 30, 2012 11:09 pm 
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Joined: Tue Aug 07, 2012 7:31 pm
Posts: 12
Bob,

Here are some pictures of my PA board ready to go in. You can see how the holes line up.

Image
DSP-610 Power Amp Front by Whirlwind128, on Flickr

Image
DSP-610 Power Amp Back by Whirlwind128, on Flickr


Cheers
Barry


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 Post subject: Re: DSP-610 Photos
PostPosted: Sat Sep 01, 2012 10:03 pm 
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Joined: Thu Aug 23, 2012 1:24 pm
Posts: 23
Barry,

Thanks. You know what they say about a picture being worth. This really helps.

Bob


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 Post subject: Re: DSP-610 Photos
PostPosted: Sun Sep 02, 2012 10:05 am 
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Joined: Wed Nov 17, 2010 8:25 pm
Posts: 61
Barry,

Kinda hard to tell from your photo, but make sure you tin T3 all the way through those holes. They generally come untinned. The Hardrock instructions explains this process pretty well.

Curtis


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