Circuit modification

I have made some modifications to the circuit shown in Audio Reality based on my friend's comment.

1. C5 & C6 is now combined to 22uF 630V Solen
2. All voltage doubler were changed to full bridge
3. All electrolytic ripple rejection caps on the 550V and negative bias were changed to solen MKP
4. All Caps on the +/- 170V were parallel with 0.1uF MKP
5. The bias circuit was also changed to cater for my need. I found that using the original values, I could get the bias no matter how hard i swab the tubes. I remember I read somewhere that the current in the bias section is 4ma, I measured the voltage after the full bridge is -305V. I works out that I need 20K for the R50 & R51, 38K for R52 & R53 and 10K for R54 to get the values of -40V and -200 - -220V. After I changed the values, the bias is OK.
6. All small valve (Au7 and Ax7) are arranged in parallel with a regulated voltage for filameents. The regulating circuit is simple LM1085 circuit
7. CL1 was changed to CL60 to cater for 220V
8. Tubes have a lot of problems. the so called EL509 is not really EL509. See here I used EL519 instead