Technics 1210 internal regulation mods

[CableMaker1]

Thanks Mike. My caps were underneath the rectifier, which is what I thought but wanted to make certian that these were the caps I wanted to remove. I was not able to find it in the service manual designed for USA use. Time to get back to complete soldering the tt for sub regulator use.

[CableMaker1]

Does anyone know these questions:

1: how to wire up the turntable to make use with the power switch while using the regulators?
2: how do you adjust the ph-sr7 for the use of additional regulators? I Had it connected to the tt without the regulators installed which outputs 21 volts. This voltage output matches that of the timestep psu voltage output.
3: in picture tap311 - are there three connectors coming out of input 3 or 4, one going to the tt, and the other two going to the subregulators?

Thanks.

[CableMaker1]

And how did someone get that XLR connector fitted onto the flange where the power cord was connected to? I do not have drill that can handle that size of a bit.

[Reid Malenfant]

And how did someone get that XLR connector fitted onto the flange where the power cord was connected to? I do not have drill that can handle that size of a bit.

If you look for something like a blacksmiths drill bit on ebay you might find your prize.

They are generally equiped with a 1/2" shank to fit the drill, but the bit can be larger.


Failing that drill it out as large as you can & then use a reamer to open it up to the size you require

[CableMaker1]

Use a reamer to open it up to the size you require

That's what she said.

[Reid Malenfant]

[CableMaker1]

I just wanted to thank mike new, Paul hynes, larry durham, sme, audio technica, isonone, and technics for providing the best turntable that one could possibly have.

[Wakefield Turntables]

There appears to be a whole lot of love (sorry couldn't resist the led zep pun) going on here.

[Mike_New]

Does anyone know these questions:

1: how to wire up the turntable to make use with the power switch while using the regulators?
2: how do you adjust the ph-sr7 for the use of additional regulators? I Had it connected to the tt without the regulators installed which outputs 21 volts. This voltage output matches that of the timestep psu voltage output.
3: in picture tap311 - are there three connectors coming out of input 3 or 4, one going to the tt, and the other two going to the subregulators?

Thanks.

Hi Mike,
It would most certainly be possible to connect up the SL power switch to control the PS but this would entail routing the mains voltage through the SL, which is what we are trying to avoid.
On the KAB PS Kevin uses a remote switch-on, which actually provides a very low DC voltage to the power switch. He actually uses the existing mains cable, which plugs into the PS unit for this purpose.

Between the two green terminal blocks at one end of the power regulator is an adjustable potentiometer with a screwdriver slot for adjustment.
Turn this screw until you get 27V Remove the DC+ wire from the PCB before doing this!!!!
There are three wires feeding out from term-4:
a) One goes to the 21V jumper wire where you had the other wire connected
b) The other two feed 21V to the two sub regulators

[Mike_New]

And how did someone get that XLR connector fitted onto the flange where the power cord was connected to? I do not have drill that can handle that size of a bit.

You would be better off making a direct connections to the 21V module and having a connector on the PS end of the cable
Opening up a large hole with a larger drill in a power tool into relatively thin material can be fraught with danger.
I speak from experience!! The drill can grab and cause the workpiece to climb up the drill at an angle and destroy the work. If you are going to do this get someone to hold down the SL1200 firmly.