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Stax SRM-1/Mk2 Re-cap - Page 4

post #46 of 50

I also think : ) but the hole are very little.

post #47 of 50

Reviving the old thread...

I just got my hand with an A series SRM1Mk2 and want to follow the mod steps underline here.

Question...what's the re-cap done to the sound quality, does it improve vs the stock one ?

Is it worth it ?

 

Thanks.

post #48 of 50
Quote:
Originally Posted by AnakBaru View Post
 

Reviving the old thread...

I just got my hand with an A series SRM1Mk2 and want to follow the mod steps underline here.

Question...what's the re-cap done to the sound quality, does it improve vs the stock one ?

Is it worth it ?

 

Thanks.

 

http://www.head-fi.org/t/228896/shelf-life-of-a-capacitor

post #49 of 50

Hi all, long-time lurker here.

 

I picked up an old SRM-1/Mk2 Pro off yahoo Japan based on the positive sentiment surrounding this model and this detailed refurb thread, so imagine my surprise when I cracked it open and the circuit layout was different!

 

I only just registered this account, so I can't attach images yet. The photo isn't very resolved, unfortunately.

https://bbbo9w.bn1.livefilestore.com/y2m24u9n__PjIaarRTksIsSiNAVyA6EqyPp2Ij3YEgdcl5gppaBNGOOtGtrhJ43xKf2dlFIMoiwDWpTDQA6SgvFYb0RXPrs4q8F3nyAE0zj2moQe4eEDEWPIJTNa-dKYrtR/image.jpg?psid=1

 

 

Different heatsinks, pot positions, and one less power supply cap, from what I see. It's serial number is A5200 with one pro bias and one normal bias output, if that helps. Would any of the local STAX experts happen to know of this layout? I'm particularly worried about the bias and offset pots, since I don't know whether they've been mislabeled on this board type.

 

That said, the amp is happily driving my SR-404 despite it's ancient internals. There was a LOT of dust in there.

 

Thanks for any advice.

post #50 of 50

That's the first version of the SRM-1 Mk2  and it's a bit different to the most common model.  Not sure which pot is which on this but it's easy to check underneath the PCB.  The pots have three pins so look for the one which has two of the pins connected together by a trace.  That's the offset pot so the other one must be the balance. 

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