Burning Amp BA-3

[timbarnes]

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

 

[tinitus]

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

 

[Backbones]

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?

 

[Zen Mod]

4x better

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

better load symmetry between secs

 

[Pocoyo]

hi zen

where you buy those graetz ? photo please

 

[gmant123]

Graetz


http://en.wikipedia.org/wiki/Diode_bridge

 

[Zen Mod]

hi zen

where you buy those graetz ? photo please

my usual place for buying Graetz's is sort of too far away for you

 

[timbarnes]

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

 

[Backbones]

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?)

 

[flocchini]

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

 

[Zen Mod]

depends what thickness of steel you want to weld

 

[flocchini]

3A a bit too much

How about 3 pair at 800mA each or 5 pair at 500mA each?
Clearly 1 F4 board per channel is easier than 2

I have 2 - 18" pieces of
10.080" - HeatsinkUSA, LLC Store

Thanks

 

[buzzforb]

ZM just scaring you. This DIY, put the heat to it. But you better have some big sinks

 

[flocchini]

Think I might hook up three pairs and run them at 1A. See how the sinks do
Thanks for making it possible

 

[buzzforb]

Package ships tomorrow. Burn baby burn.

 

[flocchini]

 

[Zen Mod]

MC5 - Motor City Is Burning - YouTube

 

[permaneder]

Yaaah, kick out the jams!

 

[permaneder]

...or the Crazy World of Arthur Brown...

 

[DILOK]

Hi,
I'm newbie for this board. I've known about class-a a little bit but I need to build something over my ACA (never complete) Now I had 15-0-15 250VA /ea Could I use ba3 for this supply ?