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Old 25th July 2008, 03:00 AM   #21
troystg is offline troystg  United States
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Default Re: Re: Dangerously wrong diagram at apexjr?

Quote:
Originally posted by mattjk



OK, I followed the instructions from another thread. You are right.

The output measures fine, but when the chipamp modules are connected, the tranny buzzes like crazy and gets hot within 15 seconds.

Is it worth the effort trying to get this thing to work or should I just get a non CT transformer?

Use what you have, just remove some of the diodes and rewire according to the corrected picture here:

http://www.apexjr.com/miscellaneous.html
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Old 25th July 2008, 03:07 AM   #22
mattjk is offline mattjk  United States
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ok, got it working sounds great!

do you think I would benefit going to a 300va transformer?

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Old 25th July 2008, 03:18 AM   #23
troystg is offline troystg  United States
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I "personally" would instead make it true dual mono and just get a second transformer like you have. One pwr supply for each channel for complete isolation.
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Old 25th July 2008, 03:29 AM   #24
mattjk is offline mattjk  United States
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thought about that, but a second transformer won't fit in the casing.
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Old 25th July 2008, 08:29 AM   #25
AndrewT is offline AndrewT  Scotland
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Hi,
or buy a 300VA of double the voltage you need.
Split the windings exactly in half and retape.
Now you have a 4secondary toroid, two windings go to each amplifier PSU.
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