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-   -   Finishing up chipamp! (http://www.diyaudio.com/forums/chip-amps/111151-finishing-up-chipamp.html)

Dougie085 2nd November 2007 01:19 AM

Finishing up chipamp!
 
Ok well I'm finishing up a chipamp for a friend because he's swamped all the time and never has time to work on it. My question right now is I have a Plitron 300VA 2x22VAC tranny. The output wires are RED/YEL BLU/GRY. On the little PSU circuit there are 2 inputs that say AC1 and 2 that say AC2 on the other end of AC1 are V- and PG- other side of AC2 are PG+ and V+. My question is which of the output wire from the tranny do I put into the AC1 and AC2 connections? I may have more questions latter so this is just kind of a little build thread.

Dougie085 2nd November 2007 03:35 AM

Ok I got that figured out nevermind.

Dougie085 2nd November 2007 08:28 PM

Ok well I got everything wired up and soldered. Just want to see if you guys think everything looks good? I have not connected an LED yet. I believe you connect it on the rectifier board but I think there is a resistor that goes before it which is not mounted there yet? I'll have to find one. I have not powered it up yet just being catious. Here are the pictures.

http://i24.photobucket.com/albums/c3...5/P1000865.jpg
http://i24.photobucket.com/albums/c3...5/P1000866.jpg
http://i24.photobucket.com/albums/c3...5/P1000870.jpg

defect9 2nd November 2007 08:43 PM

that's a very clean build. almost poetic. Can't wait to see the finished product in full.

Is the case from a supplier or did you make that yourself?

-Jared

Dougie085 2nd November 2007 08:44 PM

The chassis is from Audiosector. Its one of the chassis he sells. It's actually designed for Integrated amp use but this one is not setup that way. It's super heavy with tank like construction.

Cro maniac 2nd November 2007 08:53 PM

Nice work !

I like the inside look of that amp. Nice and tidy.

You for sure won't have any problems with the amp getting too hot as the whole case is one massive heatsink .;)

Dougie085 2nd November 2007 08:56 PM

:D Thanks! I'm a little scared to plug it in. Been double checking everything though and looks ok? One question what size fuse do you guys use for these? I got a 6.3amp fuse...I'm not sure if thats too big or to small?

Dougie085 2nd November 2007 09:16 PM

Ok well I plugged it in and no smoke! Thats good lol. The heatsink gets warm but not to hot that I can't touch it. I measure about 31v dc at the amp boards them selves. I guess I should try and play something through it?

Cro maniac 2nd November 2007 09:16 PM

I think 6,3 A should be ok because your tranny is rated 6,8 A. (300/(2x22))
For first powering when you are not sure if everything is ok yet, it is best to use some smaller fuse to minimize damage if something goes wrong.

Dougie085 2nd November 2007 10:07 PM

Ok well... sound is coming out both speakers but one of them its REALLY REALLY low. The other has normal output but lots of noise.


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