Rectifying bridge.

A picture of the hexford upgrade in an atmosphere. Cute ain't they?

Clueless link appears to be a photograph of an installed hexfred bridge.

Below is the IR technical sheet at their web site. (Note, Adobe Acrobat is needed.)

http://www.irf.com/product-info/datasheets/data/hfa06pb120.pdf

I have installed these in a number of audio components with great success. These devices are less tolerant of turn on transients and therefore should be rated approximately 20% over the original specification.

Thanks for all the reponces.
The upgrade I ment is to bring another bridge assembled as whole without getting into changing diodes(a real pain to match).
The Albert's idea seems to be great if I can acquire the assembled hexfred rectifier.

There is absoloutely no need to "match" diodes - they do not have gain like transistors. All you have to do is get 4 of the same part number. Of course, you have to wire them correctly too. :- )

As far as Hexfred bridges, there may be some, just check around the parts houses and IR's website.

Alternately, you can get very close to the same results by adding a "snubber" circuit around that bridge. Using a higher PIV bridge will only buy you some immunity from wierd transients. A higher AMPERAGE bridge will likely be slightly larger and run cooler. Doing both will up the margin against failure.

The main difference between low PIV and high PIV rectifiers is the way they came out of the wafer when they were made. So in theory the higher PIV ones of a given type designation are "better." In practice, no difference if they are properly rated for the applicaton.

Bear, diodes from the same batch with the same part number can show measurably different "turn on" voltages. I have had some 6A4's ( use them at work all the time ) measure from anywhere between .4 up to slightly over .7 or so. That is a variance of 43% !!! How much of a difference this would make in a bridge, i don't know : ) Sean
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