Hello
I am investigating using an external DC power supply with my SL1200G turntable, 2021 model. I have a Paul Hynes 12v 10amp power supply but not sure how to connect it to the TT.
would be very grateful for any advice.
I am investigating using an external DC power supply with my SL1200G turntable, 2021 model. I have a Paul Hynes 12v 10amp power supply but not sure how to connect it to the TT.
would be very grateful for any advice.
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I've never upgraded the power supply on a Technics SL1200 series TT, but will give your thread a nudge.
Doesn't the TT require a 21 V DC supply? What model of Paul Hynes PS do you have?
Doesn't the TT require a 21 V DC supply? What model of Paul Hynes PS do you have?
thanks for your reply, I am not sure of the voltage required I am trying to establish this - I have a dual output SR7, it outputs 19 and 12v.
This thread on upgrading the PS of an SL-1200 indicates 21 V DC after regulation:
https://www.diyaudio.com/community/threads/technics-sl-1200-dc-power-supply.238618/
I should think it unlikely that the SL1200G would require less voltage, but have drawn a blank on confirming its requirenents.
https://www.diyaudio.com/community/threads/technics-sl-1200-dc-power-supply.238618/
I should think it unlikely that the SL1200G would require less voltage, but have drawn a blank on confirming its requirenents.
thanks, you could well be right, I contacted Paul Hynes and he said he could help if any adjustment to the SR7 was required. However he could not ascertain what the voltage is.
this is a link to an Italian company's instruction manual, they make an internal replacement PSU for the 1200G but there is no mention of voltage!
https://cdn.shopify.com/s/files/1/0152/7532/7552/files/Istruzioni_EPS_G_edition_compresse.pdf?122
this is a link to an Italian company's instruction manual, they make an internal replacement PSU for the 1200G but there is no mention of voltage!
https://cdn.shopify.com/s/files/1/0152/7532/7552/files/Istruzioni_EPS_G_edition_compresse.pdf?122
@mot just wondering if you made progress on this?
According to the SL-1200GR service manual, the SMPS board inside the chassis outputs two voltages (24V and 5V).
My understanding is that the SL-1200G SMPS and the SL-1200GR SMPS are identical, although this would be easy to verify from the GR service manual and cross checking it with your 1200G (sorry I can't find a G service manual).
The commercial version previously referenced is here: https://precisionsoundlab.com/produ...ar-power-supply-for-technics-sl-1200-gae-g-gr - and it is presented as a replacement for both the G & GR. It seems have a toroidal transformer in an external chassis, and the rectification and regulation to 24v and 5v on the custom PCB.
Some screen grabs from the 1200GR service manual are also attached.
Have been looking at a similar PSU upgrade for the G or GR. For a diy approach, I would look at two super regulators in the chassis (as close to the load as possible, which unless mistaken is considered best practice) fed by an external chassis holding transformers and rectifiers, and perhaps some pre-smoothing caps, connected by an umbilical.
EDIT: looking again at the manual, it could be that the SMPS just puts out 24V and the 5V comes from the main PCB. Would need to measure at P2101 to verify.
According to the SL-1200GR service manual, the SMPS board inside the chassis outputs two voltages (24V and 5V).
My understanding is that the SL-1200G SMPS and the SL-1200GR SMPS are identical, although this would be easy to verify from the GR service manual and cross checking it with your 1200G (sorry I can't find a G service manual).
The commercial version previously referenced is here: https://precisionsoundlab.com/produ...ar-power-supply-for-technics-sl-1200-gae-g-gr - and it is presented as a replacement for both the G & GR. It seems have a toroidal transformer in an external chassis, and the rectification and regulation to 24v and 5v on the custom PCB.
Some screen grabs from the 1200GR service manual are also attached.
Have been looking at a similar PSU upgrade for the G or GR. For a diy approach, I would look at two super regulators in the chassis (as close to the load as possible, which unless mistaken is considered best practice) fed by an external chassis holding transformers and rectifiers, and perhaps some pre-smoothing caps, connected by an umbilical.
EDIT: looking again at the manual, it could be that the SMPS just puts out 24V and the 5V comes from the main PCB. Would need to measure at P2101 to verify.
Attachments
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