PCB mods?

[dimkasta]

I am currently working on the PSU of my SL1200 MK2, and while it is clear how an external transformer with quality rectifier, DC umbilical and a low noise reg can benefit our beloved turntable, we seem to more or less ignore the rest of the PCB.

My first thoughts was to replace the local decoupling caps C1 and C3

I used a 1500 Panasonic FC at 50V for C1 and a 47uF/25V Pansaonic FR for C3

The improvement was not small

Has anyone tried any other mods on the pcb?

I remember a few years back reading some stuff that would tinker with some thingies, but I could not find them again...

[Wakefield Turntables]

Who says we've forgot the PCB? I had mine recapped years ago and the benefits were very marked. No-one else on the techie band wagon has been bothered to explore this area of modification.

[worrasf]

Who says we've forgot the PCB? I had mine recapped years ago and the benefits were very marked. No-one else on the techie band wagon has been bothered to explore this area of modification.

- see my post http://theartofsound.net/forum/showt...pgrade-amp-PSU

Steve

[Andrei]

Who says we've forgot the PCB? I had mine recapped years ago and the benefits were very marked. No-one else on the techie band wagon has been bothered to explore this area of modification.

That reminds me - it is something I should look at. I take it you did not DIY? I'm sure it is not rocket surgery, but my natural clumsiness with a soldering iron may result in a FUBAR unless I get some help.

[dimkasta]

Well replacing each cap is one approach
But they are 38 and it is going to be tedious, and my guess is that not all of them will be that critical, not to mention that we might have to take ESR and/or ESL into consideration as well to make sure we create no problems...

There are only two marked as critical in the service manual. Those are C301 and C302 which are part of the pitch control. I would leave these alone.

I was looking for a more educated opinion on part replacement or modification
I understand it is offered as as a payed service, but I am more of a hands-on DIYer looking to "play" with my toys

[Wakefield Turntables]

I bypassed the pitch shift although tbh if I could remove it altogether from the pcb I would be happier.

[dimkasta]

Got any screenshots?

[Wakefield Turntables]

Nope! And tbh it would mean dismantling the whole 1210 and that's something I aint gonna do.

[dimkasta]

Fair enough

I found this reference

"Regarding the pitch control- you can remove and bypass it- unplug the connection of the pitch control wires/plugs and join the 2 center pins of the socket together."

Do you remember it requiring anything else?

[Wakefield Turntables]

Fair enough

I found this reference



Do you remember it requiring anything else?

Have a look on ths forum and read all the posts you will learn.