Caps have been tested at 70 years old and still held up. It’s total BS to replace them unless they fail. I bet the repair shops love your money GeorgieYou've been sold a furphy.
They dry out and loose capacity.
And I don’t do repair shops.
George Meyer told me to do NOTHING to the amp unless it breaks.I wouldn't either, but the way you were talking sounded like you were going to. If you do then do as I said with the cap banks. The 23.5 also killed a MACINTOSH mc402 . The sound of the 23.5 was far more open and detailed. Of course it did, just about anything does. But the MC275 is a different story. Cheers George |
jeffvegas OP If you do that, then for that price he’s replacing the electrolytic power supply caps (and all others). Get him to replace the (high esr) big power supply caps per channel with banks of many 105c low esr caps instead, the amp will transform in the bass and speed of dynamics. 4 x of these would be great (120000uf per channel!!) 105c if mounted vertically in place of the big slow old caps, he may even be able to use the rectifiers on them or bypass them and use the original ML ones. https://www.ebay.com/itm/Assembled-6-10000uF-100V-Power-Amplifier-Power-Supply-Board-PSU-board-for-amp/312338006220?hash=item48b8cbc0cc:g:tEkAAOSwN2VZWzww Or these even better from the same guy "if the voltage is high enough" for 160000uf!! per channel note they are all high quality Nipon Chemi-con 105c Capacitors https://www.ebay.com.au/itm/8-10000uF-80V-Class-A-Amplifier-Power-Supply-Finished-Board-AMP-DIY/253027197008?hash=item3ae998a050:g:4NAAAOSwWv5Z9sh2 Cheers George |