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KOHTOPA  
#1 Posted : Tuesday, November 28, 2006 10:59:45 AM(UTC)
KOHTOPA

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I have one spare transformer which is the same as in Kooka
(ordered two by mistake :) Can I use it for Opus as well?

Which voltage is recommended from secondary? Is it 6-9V?

Can I just use the same trafo which Kooka uses already
to avoid the second one?

Should I adjust anything in PS (R6, R8)? What should be
output voltage from PS? Is it exactly 5V?

Edited by user Tuesday, November 28, 2006 11:01:56 AM(UTC)  | Reason: Not specified

Russ White  
#2 Posted : Tuesday, November 28, 2006 12:18:18 PM(UTC)
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KOHTOPA wrote:
I have one spare transformer which is the same as in Kooka
(ordered two by mistake :) Can I use it for Opus as well?

Which voltage is recommended from secondary? Is it 6-9V?

Can I just use the same trafo which Kooka uses already
to avoid the second one?

Should I adjust anything in PS (R6, R8)? What should be
output voltage from PS? Is it exactly 5V?


I would use it for OPUS yes.

I would keep the two transformers separate. I would not share the kooka trafo for the OPUS.

Output voltage from the PS for the OPUS should be ~5V for the digital side, and ~7V for the analog side.

You could actually just do 7V for both.

Cheers!
Russ

Edited by user Tuesday, November 28, 2006 8:37:20 PM(UTC)  | Reason: Not specified

Brian Donegan  
#3 Posted : Tuesday, November 28, 2006 8:09:02 PM(UTC)
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And no R changes should be needed.

We are planning on switching to Avel 2x15VAC (25VA) as a standard trafo for JT, Kook, Opus, TXD (in i's various interations). Not sure on the price yet, but soon.
MrMajestic  
#4 Posted : Friday, August 3, 2007 10:25:09 AM(UTC)
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Would a 2x15 (2x0.5A) 15VA toroid be sufficient to power the Opus?
Russ White  
#5 Posted : Friday, August 3, 2007 10:26:01 AM(UTC)
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Yes. :)
MrMajestic  
#6 Posted : Friday, August 3, 2007 12:35:51 PM(UTC)
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I have one more related question. Will the Opus and Ballsie power supplies fit in a 4cm high enclosure or are the heatsinks higher than that?
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