Technics SL-1200 DC Power Supply

[peppennino]

A 0,01uF would be OK?

 

[peppennino]

Completed. Perfectly silent! Better soundstage and medium timbers

 

[peppennino]

I used a 10nF cap to ground the cabinet.

 

[noviygera]

Holly moly, nice work!
why is the power switch only for the strobe and not the complete tt circuit?

 

[Eric]

Great work! Now sit back with a bottle of wine and enjoy!

 

[noviygera]

Is there a problem wiring the power switch to the secondary of the transformer so that it operates like the original?

 

[peppennino]

In my photo of 230v wiring there's an error: white goes in series with black.

 

[peppennino]

Great work! Now sit back with a bottle of wine and enjoy!

Thanks, Eric!

 

[peppennino]

Holly moly, nice work!
why is the power switch only for the strobe and not the complete tt circuit?

Because I switch on and off the tt with the switch of the the psu unit

 

[AddiDub]

Is there a problem wiring the power switch to the secondary of the transformer so that it operates like the original?

Hi, i don't think it is a problem. I did it this way (original power switch to switch the secondarys of the Meanwell SMPS). That means SMPS is always on (it goes to 0.5W standby mode). Works flawless since 18 months.

The datasheet says lifetime of this smps depends on temperature of the electrolytic caps. If we guesstimate a maximum PSU temperature of 50°C the smps might survive 10 - 30 years when plugged in 24/7/365.

 

[peppennino]

Hi All!
Here's another mod on an earlier 1210 (1989, the first was a 2004 one) that has a different main board, so it probably would interest you...

The changes are the same but original snubber caps are placed under the board and the first cap and diode bridge differ from later version.

Cheers

 

[peppennino]

Snubber caps.

 

[peppennino]

Completed

 

[peppennino]

Original transformer wired for 230V, the umbilical plug and the pcb in the Galaxy cabinet.

 

[peppennino]

Completed, still in my garage...

 

[mkane77g]

This is on my to do list

 

[6L6]

Peppennino- that is wonderful!! Well done! Fantastic choice of mat and feet.

mkane - Yes. This is an incredible mod. Makes an enormous positive change.

 

[peppennino]

Many thanks Jim, it is a very nice misic machine!
First music test.

Cheers
Vincenzo

 

[mkane77g]

Peppennino- that is wonderful!! Well done! Fantastic choice of mat and feet.

mkane - Yes. This is an incredible mod. Makes an enormous positive change.

After I get the Aleph J running

 

[niekos]

I used a 10nF cap to ground the cabinet.

Looking good! Where did you find the PCB?