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Old 4th December 2012, 02:17 PM   #901
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Originally Posted by tinitus View Post
then it could be your interconnects

nice amps
I've swapped out all other components - interconnects and passive controller. The way the channel "pops on" when I raise the volume seems like an electronics issue.

Tim
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Old 4th December 2012, 02:26 PM   #902
tinitus is offline tinitus  Europe
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if it follows the BA-3, check the RCA chassis plugs

but could ofcourse be worse
like a cracked solder pad on your amp board
check all your board solderings using good quality magnifying glass
and a small flashlight in your other hand
expect a really scary sight
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Old 12th December 2012, 10:20 AM   #903
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I am building a single chassis BA-3 now and want to use a single transformer. I have specified 600VA with 4x 0-19V secondaries. Anyone have any comments about this design? Any advantage of this over just 2x 0-19V secondaries at 600VA?
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Old 12th December 2012, 12:10 PM   #904
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4x better

meaning 2 independent per channel , so 2x Graetz per channel

better load symmetry between secs
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Old 12th December 2012, 08:51 PM   #905
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hi zen

where you buy those graetz ? photo please
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Old 12th December 2012, 09:06 PM   #906
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Graetz


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Old 12th December 2012, 09:11 PM   #907
Zen Mod is offline Zen Mod  Serbia
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hi zen

where you buy those graetz ? photo please
my usual place for buying Graetz's is sort of too far away for you
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Old 13th December 2012, 02:23 AM   #908
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Originally Posted by Backbones View Post
I am building a single chassis BA-3 now and want to use a single transformer. I have specified 600VA with 4x 0-19V secondaries. Anyone have any comments about this design? Any advantage of this over just 2x 0-19V secondaries at 600VA?
The BA-3 doesn't need a big transformer - I think I'm using a 50VA Antek.

I'm guessing you're adding BA-1 or BA-2 power stages and the big trafo is for them? If so the answer to the power supply size is to be found in the articles and the discussions.

tim
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Old 13th December 2012, 09:51 AM   #909
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Originally Posted by Zen Mod View Post
4x better

meaning 2 independent per channel , so 2x Graetz per channel

better load symmetry between secs
Never did come across Leo Graetz before now but I'm gratefull to him anyway!

Was only going to use 1x Graetz per channel because that is all I have.

Thanks for feedback you guys (any gals?)
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Old 10th January 2013, 10:14 PM   #910
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Default BA3 + Crippled F4

I am planning to couple BA3 with crippled F4
Transformer is 500VA 2x 22V
Is it preferable to use 3 pairs of Fairchild devices at 1A or 5 pairs at 600mA?

Thanks

Bob
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