Thank you for your response. It doesn't look that daunting- now that I have it opened up. I am excited about tackling it. I will post pics here of the insides if people are interesred. I think I will also change out the horrible speaker posts. Again, thank you Viridian.
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So I knocked most of these out in a flash. Good quality solder and a sucker tool was my best friend. Two of the caps were difficult to see when on the board but now realize they are non polarized. I didnt take them out as I have no replacements.
I didn't see Nichcon FG, which I used everywhere else, having non polar caps. I need a 33uf 25v and a 22uf 25v. Any suggestion?
Also, some additional insight into this statement would help.
" Should any of those caps be used in the signal path for coupling then they will make a larger difference and they should be replaced with a film cap, or if the film cap in the original value, is too large, use a film cap as a bypass on the electrolytic."
Thank you in advance.
If you haven't download a service manual, here is one:
viridian already give you some excellent advise, I just like to add some of my personal experience working on vintage gears:
Frist step is power up the amp by using a variac or dim bulb tester as viridian suggested, if the amp is working, then go ahead to re-cap. you can use higher voltage rating capacitor but not lower.
Take some picture before you do anything, recap one channel first, test it make sure it is working then recap the other channel.
Thanks of all the advice. I ordered an inexpensive variac as I am going to tackle few more pieces of vintage gear. Too late on the methodical approach. I have already replaced the caps on both sides. Appreciate the manual. I had tracked one of those down before I started. I wont fire the amp up until I get the variac. Thanks again
So finished everthing today and fired it up using the variac. The sound was unbelievable. Even my wife- who isnt that interested, said it sounded great. Could be she was reacting to my ear to ear grin, but it really sounded good. I assume when caps burn in it will improve. Thanks to all.
Now takling an old Nikko tuner!
Thank you viridian. I have both the f-20 and the f-10, as well as a c20 and agree the tuners are great. The Nikko isn't a cap issue- most likely something simple in an open circuit that will not allow it to lock on a station. I am not going to put too much effort into it- I just dont like to trash things that are vintage and well made.
I have several vintage Mitsubishi pieces- 4 amps and accompanying pre's and tuners. In my uneducated opinion, they are really well made and sound fantastic. The amps had funky speaker connectors but I discovered an easy upgrade to banana posts that looks factory. I drive Vandersteen's vertically biamped with 2 da-15's and they sound incredible to me. I am weak on sources. I have older CD players but need to upgrade or consider a streaming device. Any suggestions sub $500-700 used is welcome.