nando
Been here a while!
The Frying Dutchman
Always look on the bright side of life
Posts: 393
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Post by nando on Sept 14, 2017 21:40:52 GMT
Last year I got my son a Sony audio system I bought quite cheap. Worked fine with some Tannoy M1 speakers.
I decided to look in the amp and started planning a recap. Looking closer one cap was bulging already so a recap was not to soon.
As it isn't a very expensive amp and not very sprecial (to my 9 year old son it is!) I went for good caps but not looking at cost as well. I got a funky mix of caps from Panasonic (FR and EE series), Nichicon (big caps from FW serie and PW), Wurth, Illinois capacitor (CDE).
Now I'm done soldering. A cleanup in the next days and then running the Tannoys again.
Pictures will follow soon.
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nando
Been here a while!
The Frying Dutchman
Always look on the bright side of life
Posts: 393
|
Post by nando on Sept 16, 2017 16:07:45 GMT
This amp sounded nothing really special. The old situation. A three pin capacitor and glued to the pcb. Isn't that a bit overenginering? Was this thing to be send to mars? Three pins... strange. Old glue. With smoke colouring. New big ones. Nichicon FW 10000uF 50V. These are the old capacitors? Some new red Wurth capacitors just soldered in. Choosen for high ripple current and low cost (made in China). Behind are new Panasonic FR's and behind them are new Illinois Capacitor caps. Last owner was smoking... yuk. Wipe on, wipe off.
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Post by PinkFloyd on Sept 17, 2017 20:07:23 GMT
This amp sounded nothing really special. The old situation. A three pin capacitor and glued to the pcb. Isn't that a bit overenginering? Was this thing to be send to mars? Three pins... strange. Old glue. With smoke colouring. New big ones. Nichicon FW 10000uF 50V. These are the old capacitors? Some new red Wurth capacitors just soldered in. Choosen for high ripple current and low cost (made in China). Behind are new Panasonic FR's and behind them are new Illinois Capacitor caps. Last owner was smoking... yuk. Wipe on, wipe off. Is it a feedthrough capacitor Nando? Two capacitors in one enclosure? Two capacitors with a common negative terminal? Or, does the third leg reduce inductance maybe?
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Post by PinkFloyd on Sept 17, 2017 20:28:47 GMT
You don't like smokers? If the last owner had been a "non smoker" then you wouldn't have had the pleasure of cleaning all the tar off the amp! Us smokers keep you guys entertained and busy
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nando
Been here a while!
The Frying Dutchman
Always look on the bright side of life
Posts: 393
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Post by nando on Sept 18, 2017 6:20:04 GMT
I think the third leg and glue was for strengthening the attachment to the pcb. The island it was soldered to wasn't connected to anything. Sigarettesmoke gives me headache. I cleaned the outside when we gave the set to my son but now was a good opportunity to clean most of the inside as well.
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Post by PinkFloyd on Sept 18, 2017 19:47:07 GMT
I think the third leg and glue was for strengthening the attachment to the pcb. The island it was soldered to wasn't connected to anything. Sigarettesmoke gives me headache. I cleaned the outside when we gave the set to my son but now was a good opportunity to clean most of the inside as well. Oh well, if the third pad was blank then it will be fine. The stock Nippon caps are pretty decent, made in Japan but upping the capacitance to 10,000uF should bring about sonic rewards. You've certainly been busy Nando, are you feeling more confident now? The more you do, the more you want to do and with practice comes confidence. Really good to see you preserving / improving equipment rather than throwing it in the bin and buying new gear...... it's a lot more fun, and a lot more satisfying, getting under the bonnet isn't it? Mike.
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nando
Been here a while!
The Frying Dutchman
Always look on the bright side of life
Posts: 393
|
Post by nando on Sept 18, 2017 19:58:37 GMT
I think the third leg and glue was for strengthening the attachment to the pcb. The island it was soldered to wasn't connected to anything. Sigarettesmoke gives me headache. I cleaned the outside when we gave the set to my son but now was a good opportunity to clean most of the inside as well. Oh well, if the third pad was blank then it will be fine. The stock Nippon caps are pretty decent, made in Japan but upping the capacitance to 10,000uF should bring about sonic rewards. You've certainly been busy Nando, are you feeling more confident now? The more you do, the more you want to do and with practice comes confidence. Really good to see you preserving / improving equipment rather than throwing it in the bin and buying new gear...... it's a lot more fun, and a lot more satisfying, getting under the bonnet isn't it? Mike. More fun? Oh, hell yes! There is an initial investment in soldering gear and time to learn some basic skills but then I can preserve decent equipment which otherwise would cost me a lot more than the 50 euro (give or take) for the capacitors. I'm getting more confident indeed, thanks to you, Mike (and stuff not blowing up in my face). I agree. This Sony amp wasn't badly made. But it is mid 80's and therefor more than 30 years old with original capacitors. I think that's not bad but now is a good time to fresh up the machine. I'm now looking at the bellows of the cd player of the Sony set of my son. This is a whole other story. If I'm boring you with my threads about my stuff please say so.
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