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BPA300 Round 2

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another possible stereo layout

With only one toroidal transformer 1000VA 4x25V.
What are the exact measures of amplifiers pcbs?
 

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Use a couple of thermistors like Cl60 or whatever matches your particular amp needs. Install a time delay on relay to switch out the thermistors and bring in the line load. A decent timed delay on relay on Ebay is not too terrible expensive and the thermistors are dirt cheap.
ESP audio the Rod Elliot site has a good soft start circuit. Just google and you should not have any problem finding it.

Tad
 
samsagaz said:



Can you please poing me to some website where can i see an pic of the "3 way terminal block"?

and i see your website and TI Datasheet where i see that say 1uf instead 0.1uf, this will be the same?

Regards


Sorry, i was thinking the wrong thing here. 1uf is correct.

I have to hurry off somewhere now, i will post the terminal block when i get back.
 
The mains fuse needed for a transformer or motor is about
transformer power Times three Divided by mains voltage.
Fuse rating = VA * 3 / Vac.
This applies to any size of transformer.

If you are happy using a fuse three times as big as you need then go ahead.
I recommend close rated fusing that allows the amplifier (or any equipment) to run with in it's design specification and does not suffer from nuisance fuse blowing.
This fuse rating <= VA / Vac.

eg.
100VA transformer running on 110Vac.
Without soft start it requires a T3A fuse. Close rated fuse could be between T600mA and T1A
Now try that for 300VA and 500VA and 1kVA.
I know which I prefer.
 
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