PSU II voltage problem.. help!

[LSfarzo]

Hi all,
i got a PRE-PSU-PHONO Series II from WAD since 3 years ago together with a KAT6550. I'm very happy with them but only from the last year I'm start really using my phono since I bought a thorens 124 with a sumiko pearl and a linn basik arm...

The fact is that the phono ii sounds... bad!
The sound is closed, dummy, very inflated in the medium-bass section, dark and confused. My God!

I decided to tweak it just as I made with all the other components..but no great improvement came ! though I put Jensens PIO, carbon resist.. etc.

Then I decided to check if everything was fine and I discovered that my PSU gives, for the test point 3 217V with no load and 312V with load.. after some checking I discovered that the Test Point 1 (before the psu choke) is 307 V with no load and 332V with load! there seems to be a problem... the expected ones are 338/363 ! All the other test points that comes after Test point 3, for the phono II line are all lower, too much lower, i think, than the expected voltages!

I checked the tx and it was 247V ac, has expected.. so i checked the output of the D1/D4 bridge and found 307v/332v.. so it seems that the bridge diodes is the one to give the problem of the low voltage
Am I on the right path, in your opinion?

Have you got some suggestion with the kind of diodes I can use? I tweaked the kat by substituting the BR with the bridge discrete diodes and was very happyl. May I do the same on the PSU with the same bridge project (http://www.world-designs.co.uk/forum...ad.php?t=573)? or am I to use some different components?

Please, help.

luca