I recently purchased a Cyrus One amplifier partly out of curiosity & partly because I felt sorry for it.
It was in a sorry state as you can see with nextel paint flaking off all over the place, all of the controls only worked in certain positions, 50hz hum over the speaker outputs & the phono stage sounded like aliens were trying to make contact !
I disassembled it & found a very nice Holden&Fisher transformer, LM317 regulators, Alps controls, soft recovery diodes & slit foil psu caps all with a very high quality circuit board & layout... I like !
Started work on it today, now I dont normally bother with fancy capacitors but decided to give this one "the works" so replaced all of the electrolytics with Nichicon Muse (pretty colours!) The power supply caps got changed for Kendeil 10000uf/50v (originals were 7000uf/40v) both bypassed with MKP films... Also replaced the power amplifiers input caps with MKP films. I've just finished cleaning the volume control/input selectors with Servisol which seems to have helped them.
Currently giving it a little test run & it sounds very promising indeed ! Just waiting for some more capacitors to arrive + DIP8 sockets for the opamps
I'll be stripping & respraying the cast aluminium casework at the weekend.... Keep you posted