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Starving Student PCB's - Page 21

post #301 of 307

My two boards arrived today. BIG thumbs up to Fred for doing this. I imagine it's a lot of hassle for a couple bucks. Very high quality boards for such a great price.

Couple of questions for the group.

 

1) On that Mouser BOM that's been linked a few times, I don't see it including the Molex or other connectors. Are people just soldering to the board? That's OK by me. Screw type are OK, too. (I saw the parts listed in the thread)

 

2) I also have a Mac Mini case, but mine is metal and hard plastic. The top, which will house the tubes and the heat sinks, is mostly plastic with a thin sheet of metal below. Is that a terrible idea? Other option is to house heat sinks behind the board, still in the case. It's metal on the bottom. Or, just buy a case and use that one for another Class D project, with far less heat.

 

Thanks again, Fred!

post #302 of 307

Fred,

I received your boards a couple of weeks ago. Today -  I just finished it :gs1000smile:

Powered it up for the first time and no smoke - always a good sign!

It worked just fine. The sound is pretty darn good too.

 

To answer DaKubes's questions (above) - I ordered the standard Molex header (2.54mm or 0.1" spacing). They worked fine, except I had to slightly enlarge some of the holes on the PCB with a drill bit. Of course you then also need to order the pins for the cable connector. I found a "cheap" crimping tool on Amazon for $20 (search for HT-225D Full Cycle Ratchet)

 

Also, I think you'll have a problem with the plastic top. I found the tubes get up to 140 degrees F and the heat sinks for the MOSFETS get up to 125 degrees. You are going to want a metal case.

 

post #303 of 307

Are these still available?

post #304 of 307
Quote:
Originally Posted by elecen010 View Post
 

Are these still available?

 

 

I pm'd Fred several days ago and haven't heard anything back. I suspect they may still be available but Fred is not.    Hope it is just a vacation or a business trip and nothing less pleasant.

post #305 of 307
Quote:
Originally Posted by Wiljen View Post
 

 

 

I pm'd Fred several days ago and haven't heard anything back. I suspect they may still be available but Fred is not.    Hope it is just a vacation or a business trip and nothing less pleasant.

I received 2 boards from him just a month ago. So, they should still be available.

I had PM'd him and he got back to me after about a week.

post #306 of 307

I have a couple LED power supplies that are capable of 48V 2.5A per channel with 3 channels per unit that I was going to use for building an amp.  I have been thinking about building one of the SSMH or one of the GainClone designs.    This is usually when I start thinking stupid stuff like what would happen if you used the Tube stage from the SSMH as the pre-amp for the power stage of the Gainclone and combine the two?    Is this impossible, stupid, or something that might be an interesting thought?

post #307 of 307

I ordered four pcb's on March 20th and received them today in excellent condition. (From Australia to Holland in less than two weeks)

A big thanks to Fred for his speed and effort!

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