Gainclone building contest details (from BrianGT group order) - diyAudio
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Old 3rd April 2004, 02:24 PM   #1
BrianGT is offline BrianGT  United States
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Default Gainclone building contest details (from BrianGT group order)

For those who participated in the group order for the gainclone kits/pcbs. The last of the orders were shipped out last tuesday (3/30). Everyone should receive their boards/kits soon, so here are the details to the contest that I am organizing:

Here is the link to the current gallery:
http://www.briangt.com/gallery/nigc

I urge everyone to start finishing the projects soon and begin mailing me pictures. I will be giving out a free pcb set for the first 20 people to e-mail me finished pictures of their amplfiers built with the kits. Pictures must show an amplifier in a finished state, showing the completed unit, and a view of the insides. [between 2 and 12 pictures accepted] Please size pictures down to 800x600 (so that my e-mail box doesn't get flooded with 20meg attachments) and e-mail them to me.

(offer limited to 1 free pcb set per person participating in the group order)

Rafal 's amplifier is a good example of the bare minimum:
http://www.briangt.com/gallery/nigc-rafal
but the more pictures, the better!

Once I have a large number of entries, and an updated webpage, I will award a more substantial prize for what I feel is the best unit in the gallery (sorry Peter, your amps don't count, since they look too good, and might discourage competition)

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Old 3rd April 2004, 02:41 PM   #2
BrianGT is offline BrianGT  United States
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Feel free to post pictures in this thread, and I will add them to my gallery also.

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Old 4th April 2004, 01:31 AM   #3
matjans is offline matjans  Netherlands
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not too popular, this thread...

got mine fully working yesterday. no digicam at hand right now, i'll post some pictures later. Sounds pretty good, maybe a little too much on the bright side but it's only been playing for like an hour or three.
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Old 4th April 2004, 03:04 AM   #4
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Are you using insulated or not insulated chip?
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Old 4th April 2004, 03:19 AM   #5
matjans is offline matjans  Netherlands
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the insulated version. i'm rrunning it on 22v secondaries (which gives about 32 V dc)

thinking again, it might not only be the caps & other stuff that need burning in. for all signal wiring i'm using silver wire. WHen i made my most recent interlinks i used the same silver wire. Only after a day or two of fulltime playing did the bass kick in.

I really like the sound of this stuff, 0,4 mm thick. Bass goes nice and deep and highs are really clear (but still smooth).

The insides of the case have gotten a little messy and i still have to put some copper foil on the edges for shielding but otherwise it's finished.

/matti
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Old 4th April 2004, 05:12 AM   #6
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I think the "building design contest" is a good idea to get people to show off their creative designs!

Peter, your design looks AMAZING! I want to make something similar for my next GC case... Could you explain a bit on a few things?

1) Where did you get the screws? If they are aviation screws, where can I get regular torx screws?
2) How did you get the screws to stay in the wood? They appear to have machine screw threading...
3) What type of wood is that?

Thanks!
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Old 4th April 2004, 05:23 AM   #7
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It is Zebrawood. After tapping the holes (in wood), I applied a lot of crazy glue to harden the surface and did the tapping again. It is pretty strong now.

The screws were actually bought locally, surplus. There are numerous mail order outlets dealing with those type of fasteners, and Home Depot carries limited assortment of those as well
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Old 7th April 2004, 01:50 AM   #8
BrianGT is offline BrianGT  United States
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Let's see some more pictures and get this contest running!

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Old 7th April 2004, 01:51 AM   #9
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Can I make different amps for the contest?
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Old 7th April 2004, 01:55 AM   #10
BrianGT is offline BrianGT  United States
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Quote:
Originally posted by Peter Daniel
Can I make different amps for the contest?
I am curious to see how many different kits of amps you can build with all those pcbs that I sent up to you.

I will accept your entries, as long as you send me lots of pretty pictures of them to put in the gallery.

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