Bridge rectifier

[Lurcher300b]

The advantage is that if there is any current in the ground, because of either the amp circuit drawing different amounts from the +ve and -ve rail or the audio not being balanced around 0 then you don’t pass the current through the transformer secondary and so cause it to saturate.

[29mile]

Speaking with Tomasz, he's not seen that particular bridge rectifier arrangement on any of the NVA amps he worked on. Richard must have had his reasons, though...assuming it was his work.

As we know Richard was very frugal when it came to components so spending another £1 on an extra rectifier must have been justified in terms of sound quality !!

[Daniel Quinn]

So stereo amps also have 1 rectifier?

[Latteman]

My A20 does

[Daniel Quinn]

I've got an old a60 it uses 2.

[29mile]

Interesting that your old A60 has 2 rectifiers and a single transformer ? My early 90's A60 just had the one rectifier.

[Latteman]

I've got an old a60 it uses 2.

Is that the external heat sink version ?

[Daniel Quinn]

Yes, 1984ish