Rectifier bridge

[kedde]

Hi
How much current can it deliver ? (with the recomended/default components)
Im going to use 4 in 2 zappulse monoblocks. Whats the best fit ? Should i use the C or the C+R configuration ?

Whats the advantage of adding the resistors ?

Br Kedde

[peranders]

I'll assume that you are refering to my RFB02.

The current is very dependent of the diodes you use but even more important is the cooling. For home use I think 25 mm high heatsinks will be sufficient but you can use higher ones. You can also mount them as Sigurd has done. Then you can pick out everything the diodes may be able to if the big heatsink is made right.

Check Sigurd's pictures
http://instantboard.com/users/peranders/viewtopic.php?t=89

When it comes to the snubbers, those are mainly to reduce RFI. 100 nF alone  will work pretty good and if you want to insert a resistor, 1-10 ohms to start with is good I think. If you really want to tune in the right value you must measure it carefully with oscilloscope and/or spectrumanalyzer.

If you want to use a resistor, take 1-2.2 ohms. This will surely do some good.

BTW: I was in Sønderborg in 1966 I think on a holiday. We rented a small house very near the beach.

[Sigurd Ruschkowski]

Let me first say the RFB02 designs are great! I have about 16 of them  

If you need the snubbers or not depends on your choice of diodes. Some diodes give more RF noise than others.
Today, many use fast recovery diodes even for audio purposes.

I would say that the 3rd best diode choice is fast recovery diodes (FREDs), then as 2nd we have the fast soft recovery diodes, and on 1st place we have Schottky diodes (no recovery).

I use soft recovery diodes and Schottky diodes for all my own designs.

Whn I use Schottky diodes I do not use snubbers, and I have quit using the snubbers with soft recovery diodes.

You can also use the RFB02 as a base for filtering RF from the AC voltages from the transformers as I have done here
http://instantboard.com/users/peranders/viewtopic.php?t=93


Sigurd