Build DIY rectifier or buy premade one from Sure?

[Ampliwire]

Hi!

I'm in the process of building a rectifier for the power supply section of an amplifier I'm building, using a 55VAC 625VA toroidal transformer.

It is going to be used to power the Sure 2x125W IRS2092-based board. I was originally planning to build the rectifier myself, using power diodes, but I see Sure Electronics has a premade board that looks tempting... Two actually.

So my question is - are the Sure Electronics rectifier boards a good solution, with a sane choice of components? I see it uses STTH1602C High frequency ultrafast diodes - are these any good for a toroidal transformer?

These are the boards in question:

Sure Electronics' webstore 20A/75V 18,800Uf Rectifier Board ? STTH1602CFP

Sure Electronics' webstore 20A/100V 37,600Uf Rectifier Board ? STTH1602CFP

 

[richie00boy]

It is unnecessary to use fast diodes, but that's what they tend to be when you use TO-220 package. Nothing wrong with the board really.

 

[Ampliwire]

I see, maybe I should go for the readymade board then, and instead concentrate on making a DIY voltage regulator to put between the rectifier and amplifier board.

Would the 20/75V 18.800uF version of the Sure rectifier board be adequate for the Sure version of IRAUDAMP7s, or should I go for the larger 20A/100V 36.600uF version? The toroidal transformer I'm about to order is this 50V one:

VTX-146-500-150 - MULTICOMP VTX-146-500-150 - TRANSFORMER, 500VA, 2X 50V | Norge

or maybe this one (but more expensive, and 55VAC - might be too much for the IRAUDAMP7s, as it will become about 77VDC?)

MCTA500/55 - MULTICOMP MCTA500/55 - TRANSFORMER, TOROIDAL, 2 X 55V, 500VA | Norge

Please bear with me for asking these basic questions, this is my first DIY amp.

 

[nigelwright7557]

I wouldn't bother with a regulator.
I have built lots of amplifiers without regulators and they all worked with no problems.

 

[Damon Hill]

I fully agree; a regulated power supply is the equivalent of building two amplifiers to do the job of one. A well-designed passive power supply and a well-designed amplifier will have reasonably low noise and ripple, and good power supply rejection.

Keep it simple.