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Thank you all for your kind words!
I bought it online with the knowledge that it was not functioning. I don't have any history on the amp but I do know there were very crude attempts at repair which probably caused more damage. The vaporized voltage gain pcb is probably a result of amateur repairs. I am not tooting my own whistle here; I am far from a professional audio technician. I had more questions about how this amp worked than anyone! I did take my time and used sane methods to troubleshoot. An amp with power reserves like this is like a lightning bolt. It demands respect and we just have to keep that lightning controlled. I knew an amp of this age was going to need a recap anyway, so why pay premium for a working device that would probably need work? At least this way I knew it was done and could I document it. I also did many of the performance and safety enhancements that ML deemed necessary. As for the year it was built...I am not sure. There is no implicit date stamped on the back. There is only a serial number of 1618. I don’t know what the production rate of these monsters was but to me that number seems fairly low, so it could be an older unit. Thanks again.
Wow! That polished surface is awesome! Kudos!
I seem to recall there was a problem with the original caps in early production models with that series anyway, so you're right to be ahead of the game than with a "working" resale.
I had a ML 333 years ago. A real beast. Two things I did that greatly improved performance were a custom stand from Sound Anchors that greatly improved bass and a dedicated 30 amp line that made it sing with ease.
Don't worry about resale . . . enjoy!
@zavato ...I stand corrected. I meant 20+ years. My mind is stuck in the era of the Model 23.
@jafant ...Currently the ML332 sits comfortably in my project studio. It has replaced a Carver amp which will soon earn a much deserved tear down and recap. It is being driven by a Ramsa DA7 automed console via balanced cables and it drives a pair of Event near-field monitors. Not an esoteric compliment of components but they do provide some exceptional sound. The 332 is not really being challenged at all in its current environment but I will be damned if it does not look sexy lying there!
Eventually I may move the 332 to the main living space. I am certain it would outpace the Yamaha equipment there now. Baby steps.
I have always been an audiophile at heart but never in the practical sense. Could I get the gear? Probably, but the rational, responsible side of my brain prohibits me from making such purchases, especially brand new. I have always been the window shopping type, lurking in the shadows for the next good deal :)
Thank you all for your warm comments.
Very Nice. May I ask where you got parts from.(Caps etc).
The main caps are available from Mouser.com
They are about $85.00 each. Part No. 598-3186GJ503M125DPA.
They are not exact replacements for the orginal Phillips caps but they meet or exceed the rating of the originals.
All the other smaller electrolytics were purchased from Mouser or Digikey.
You will not find exact replacements for small signal caps. You have to find suitable replacements with matching or slightly greater voltage, equivalent capacitance and equivalent size.
Mouser and Digikey offer a grid where you can filter down and find the appropriate replacement. As capacitor technology has advanced quite a bit since the late 80’s you will often find equivalent caps in shorter, denser packages. Mouser and Digikey offer top quality Nichion, Panasonic, Illinois and CDublier caps so choose your poison and then bring that glorious M.L. beast back from the grave.