1000W Simple PA Amplifier

[TonyTecson]

how about opening a new cap spec thread instead?

 

[Vrystaat]

Tony,
I think what he means is that some transformers has different ratings. Eg 0-220vac and -10-0-220vac.It doesn't matter a lot because the mains might differ that much,

 

[TonyTecson]

Tony,
I think what he means is that some transformers has different ratings. Eg 0-220vac and -10-0-220vac.It doesn't matter a lot because the mains might differ that much,

well you know how lawyers think, to the letter.....

 

[TonyTecson]

btw, some years ago, i reformed two sets of caps, one pair rated for 50 and another for 63v. guess what, the 63volt unit reformed to 77volts with current leakage very minimal in the microampere range...

 

[Vrystaat]

Yep, its the fine line that we miss !! Happens to me also !

 

[Vrystaat]

Tony,
I have got Siemens 100v caps coming from a 50v rectifier that i have reformed that is testing almost 10% above their rating,they are 30 years old. I haven't tested their ESR, but I think they will still be OK.I have used some of them before, I have had no problems,

 

[tinitus]

inner sub-chassis that will carry the amp

 

[tinitus]

 

[JMFahey]

Nice.
Where did you get the pre-perforated steel panels?
Are they normally used to build storage racks or something?
They sure may be an option for home builders; the most difficult part is the "mechanical" one, not the Electronics.

 

[wiljj78]

Corrected Tex Error

Here's the correct one...

 

[tinitus]

Nice.
Where did you get the pre-perforated steel panels?

thanks!

cut out of big U-profile
I think it comes from scrapped shelves for industrial mains wire

 

[rizqi]

BA1200 pcb layout

I drew this just for fun, and will build at leisure time, ..
Thanks willy and first Mile ..
regards ........

 

[rizqi]

pcb REV

I'm sorry this for fun

 

[Riff]

BA1200+Inbal+DC Protect+Classs H

but NOT TESTED.

 

[apexaudio]

I drew this just for fun, and will build at leisure time, ..
Thanks willy and first Mile ..
regards ........

Your pcb dimensions is out of standard for use with 3U standard heatsinks dimensions must be 265x112mm and distance from outputs must be 96mm.
Regards

 

[rizqi]

Your pcb dimensions is out of standard for use with 3U standard heatsinks dimensions must be 265x112mm and distance from outputs must be 96mm.
Regards

thanks sir,.. will be revitions next time,..

 

[khalsa]

EXCELLENT PCB rizqi

 

[apexaudio]

Here's the correct one...

Willy can you resize BA1200 pcb for 3U heatsink as option?

 

[wiljj78]

Willy can you resize BA1200 pcb for 3U heatsink as option?

Sure Mr. Mile... why not? is that dimension given on rizqi pcb? if not please post the pcb with new dimension required for 3U heatsink so i can resize it accordingly.

 

[apexaudio]

Sure Mr. Mile... why not? is that dimension given on rizqi pcb? if not please post the pcb with new dimension required for 3U heatsink so i can resize it accordingly.

Yes, 260x112mm and distance from outputs must be 96mm.