Refurbished MAC200

Bertje · Post by **Bertje** » Sat May 24, 2008 12:04 pm

For member martinkruit, I'm refurbishing his MAC200 amp. I did also all his other amps (I think..

), some nice pics from exchanging caps.

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nico boom · Post by **nico boom** » Sat May 24, 2008 9:39 pm

Welkom hier!
The Dutch invasion has started for sure..

MINI COOP · Post by **MINI COOP** » Sun May 25, 2008 11:09 pm

ah, nice job.

I will change the caps from my mac200 to. that for practice, the real job will be the MS1000

Post by **stipud** » Mon May 26, 2008 6:37 am

Dag Bertje,

Thanks for the pics!

Do you replace your sil-pads with every cap change?

martinkruit · Post by **martinkruit** » Tue May 27, 2008 3:25 am

What the F**** are sil-pads???

Bertje, not al my PG amps (YET

)

nico boom · Post by **nico boom** » Tue May 27, 2008 6:07 am

stipud wrote:
Do you replace your sil-pads with every cap change?

I do on every amp for sure....
Last time I ordered 100 silpads, and 20 caps at once; Didier keeps bringing amps my way for cleaning and capchange...

[last time 3x MS275, 1xMAC200, and an original MS2250]

p.s Martin; silpads are the thin silicon plates between the fets and the heatsink, for electrical isolation, and heat-transfer.
They age, and when the board has to be taken out of the heatsink, they are better replaced!
[rechtsboven op de foto]
Nico.

martinkruit · Post by **martinkruit** » Tue May 27, 2008 8:25 am

OK bedankt

Bertje · Post by **Bertje** » Tue Jun 03, 2008 10:31 am

The silpads I only exchange when they are in bad condition. When they are looking OK, why changing? Isolation and heatconduction don't change that much I think.
Rob.

nico boom · Post by **nico boom** » Tue Jun 03, 2008 10:46 am

Rob; WHY NOT change them?
They are cheap, and how many times do you take out your board?
Most of the times when you remove the board, the silpads leave a print on the heatsink, which indicates they leave some of their material on the sink; re-using them would be a bad idea IMO.