[Convert 0-30V 3A PSU to 5A or more]

In our contry i cant get more than 9W resistor :-\.
Can i connect parallel two 0.56ohm/9W resistors?
Then i get 0,28ohm/18W- is that correct and OK ?
or i have to buy 0,27ohm resistor in one pice...?

Tnx

[Convert 0-30V 3A PSU to 5A or more]

Hy Audioguru.

What should i use for R7: 0,47ohm, 0,39ohm or 0,27ohm ??

[Convert 0-30V 3A PSU to 5A or more]

Hy Audioguru 8)

Can i use four of 2N3055 with 0,1/1W or 0,22/1w so they share the heat??
Because i have monted 4 transistors on heat-sink yet it looks better and nice ;)

Tnx

[Convert 0-30V 3A PSU to 5A or more]

Thanke you Audioguru for this informations. You helped me allot 8).
I will use 3 transistors 2N3055,because someday i will use 250VA transformer or more... ;)

Can i use instead of 0,1/1W a 0,22/5W with 2N3055,
i wont to use 0,22E or i have to use 0,1E ???

When i will run and test this project i will send you the results ;D

Tnx

[Convert 0-30V 3A PSU to 5A or more]

Thanke you Audioguru for this answer.
I have 33Vac not loaded and 150VA transformer.

Tnx

[Convert 0-30V 3A PSU to 5A or more]

Hi to all!

I just have one question about transformer.
I have one transformet sec. 33Vac - this spec. is for notlouded transformer. I didnt try to load it jet.
I will use OPA445 chips.
Is the transformer sec. 33Vac (notlouded) to high for this project???
Should i have less voltage,maybe 30Vac -notloaded????

I see that you use 30VAC / 225VA transformer,but i dont know if is that spec. with loaded or not loaded transformer ???

I build this project and now i have to just connect the transformer.
I just wona be shore,that my 33VAC-notloaded, is ok for this project.


Tnx