it's really quiet here at the moment (really hoping the thread will not be that dead forever)!
spent a lot of time reading everything about power supply and voltage regulator design, impedance, LC-networks and - filters.
in the meantime i got a lot of parts for my highend-mod-version of the tu-05:
lots of capacitors (Mundorf supreme silver.öl foil capacitors, mundorf m-lytic, elna silmic II, nichicon muse electrolyte capacitors, wima mkp4 and mkp10), lots of inductances for the LC-power-filters, high precision 0.1% resistors, small silver mica capacitors to block RF interferences, power transformers and filters, ultrafast soft-recovery 8ns (nano seconds) rectifier diodes, lots of small aluminium and iron boxes to shield the different parts of the amp, copper foil for the same purpose and shielding all the signal wires, and much more not shown here (all the xlr jacks and connectors to modify my headphones and to make some adaptors for example).
as the mundorf supreme silver.öl capacitors were only available with 100nF and 220nF but not 150nF, i called Mundorf and was more than happy that i managed to get four custom made mundorf silver.öl foil capacitors with 150nF in addition!
and i found and bought something very special i never had dreamed of that i could affort this:
the capacitors shown in the picture above are mica capacitors (sic!) 100nF 500v. if you search the internet for new ones you have to pay up to about 150 Euros per piece, i got these East German NOS ones for just 8,90 Euros each!
i measured the capacitance and they are all 100nF within 2% tolerance!
i will definetly test them with a mica coupling capacitors only version.