DIY Mic Pre Kits, Lunchbox Mic Preamp Kits, Power Supply Kits

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 Post subject: PM1000 and PSU-4448
PostPosted: Wed Apr 02, 2008 4:21 pm 
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Joined: Mon Mar 17, 2008 9:34 pm
Posts: 8
I have your PSU-4448 with toroidal transformer. I'm wondering how I should wire this up. I found a couple of diagrams on your forum with some searching but there are two things I'm wondering: Where do the "CT" -- red and orange, I think -- wires go on the PM1000, (if anywhere), and how should I wire up the LED? There's no LED pad on the PSU-4448 like on the SC-1. Any info would be appreciated!

Thanks!
Chris


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 Post subject:
PostPosted: Wed Apr 02, 2008 4:32 pm 
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Joined: Mon Mar 17, 2008 9:34 pm
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OH! I just saw the updated instructions for the 4448. I'd still like to see how the LED should be wired, (and it indicates that the orange wire goes to AC2 - I think it should say the yellow wire).

Thanks again!
Chris


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 Post subject:
PostPosted: Wed Apr 02, 2008 4:58 pm 
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Joined: Mon Jun 25, 2007 6:09 pm
Posts: 1261
Location: Music City
http://www.fivefish.net/diy/psu4448/pdf/psu4448docs.pdf

Orange and Red are tied together.
Black connected to AC1.
Yellow connected to AC2.

For the LED, you'd need to put a series limiting resistor. Compute R = E/I

E=44V
I = 5mA = .005A
R = 8.8K I'd even use 10K or higher.
Wattage = (ExE) / R
= (44 x 44) / 10000
= .19 Watts = You can use a 1/4 watt resistor, or 1/2 Watt.

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 Post subject:
PostPosted: Wed Apr 02, 2008 6:55 pm 
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Joined: Mon Mar 17, 2008 9:34 pm
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That's perfect, Owel. Thanks so much!

Chris


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