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Gainclone PSU blowing fuses - Page 2

post #16 of 20
7/5/10 at 6:28am

Always use slow blow with toroids. 

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post #17 of 20
7/5/10 at 6:44pm
Thread Starter 

Yes that's what I was planning but I grabbed some fast blow too just to see what happened.

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post #18 of 20
7/6/10 at 9:02pm
Thread Starter 

Here's the picture of the transformer/PSU as requested:

 

gcpsu1.JPG

 

A quick explanation of what's going on: the black/white pair connected to the IEC socket w/fuse is the primary winding. Red/yellow and grey/blue are the two 22V secondary windings which go into the gainclone PSU. The brown/purple pair is the 7V winding which will eventually connect to a TREAD or similar to produce 5V. Vcc +/- from the PSU will each go into a relay board (the two boards next to the PSU) to switch them on and off (ground at all points will go directly to a star ground). Then all outputs (+36Vdc,-36Vdc,5Vdc) will be gathered onto the smaller terminal block to be distributed to wherever they need to go. I'm testing the layout on this piece of wood for now but once I'm satisfied with the layout it will go into a Par-Metal 20 with proper safety grounding and a ground loop breaker.

 

Also, this is apparently my 1000th post. I was hoping to have this whole project completed by then, haha.


Edited by Juaquin - 7/6/10 at 9:08pm
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post #19 of 20
7/8/10 at 9:50pm

interesting.  i have a few TX from Richard and he always designates black as "*" on the spec sheet he sends with every TX.  since it shouldn't matter what single primary side is connected to "L" or "N", i've always just went with the standard color coding scheme with Black as "L" and White as "N". 

 

http://i23.photobucket.com/albums/b353/fishski13/004-6.jpg?t=1278649712

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post #20 of 20
7/9/10 at 12:30am
Thread Starter 

Yeah, that's what I initially tried but no luck. When I get back to school next week I'll pop in those 3.15A fuses and see if that configuration works. I'm willing to bet it was simply that the TX was pulling right around 2.5A, some fuses couldn't take it, and the configuration at the time of a fuse blowing or not was merely a coincidence.

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