TECHNICS SP-1OMK2A WITH SH 10E PSU?

[sikander747]

I have Technics SP 10 Mk2A turntable that I am using with Technics   SH 10E power supply unit which was for SP 10Mk2 and not the SP 10mk2A . The STRANGE! thing is that my turntable is working very well with the this older 10E power supply meant for the SP 10Mk2 please  the letter A in the model number is the newer version of the SP 10 Mk2 . Iam a little concerned as the back of my  SP 10 Mk2A says to use it with only SH 10E"A"  power supply the A in the model number being for the SP10mK2A.  Will some nice soul advise me?!! THANKS!

[JaS]

As far as I'm aware the voltages and pin outs on the mkIIa power supply are the same as the original mkII, although some changes where made to the circuitry. I don't believe you should have any problems unless you are drawing too much current - for example the 'p' model  (sh-10ep)  requires 1.08A on the 5V (logic) line, the original mkII only 0.38A, while the 32V (motor) and 140V (strobe) lines have the same ratings. This is probably down to the rather different logic circuits of the pro model. If you check the plate on the motor unit and the power supply and you should be able to check they have the same ratings. If not maybe it would be worth sticking an ammeter on the lines to see what typical current draw is and cross reference this to the plate on the power supply to see if its within tolerance? My guess is that they will be fine, and that the logic circuit may already of been causing trouble if the power supply voltages where being dragged down by the load. Regards, JaS

[sikander747]

Dear JaS,  Thanks for your kind reply and advice!  I was able to find out the current outputs on the  5V, 32.5 and 140V outputs from both the SH-10EA and the old SH-10E PSU units.   On the 10EA unit the current draw on the 5 volts line is: 0.015 on the 10 E its: 0.028A, the 32.5 line the current rating is: 0.025A on the 10E: 0.22A and  the 140 volt line: 10EA: 0.007A , the 10E: 0.005. So the 5V logic line uses less current uses less current to run in the newer SP-10mk2A then the regular SP 10 Mk2!  BUT!!! then newer higher torgue motor in the SP 10Mk2 A  draws slightly more current then the regular model on the 32.5 V and 140 V output lines.  Thats why my SP-10Mk2 A is working well because the voltages are the same! as you mentioned only the current draw is less is the very important! 5V which powers the many ICs in the SP 10Mk2A the old 10E power supply can actually supply a little more current on the 5V line then the newer 10 EA power supply which can supply only 0.015 A versus 0.028 on the 10E power supply of the regular sp 10Mk2.   You are right if the older power supply will work well if I dont runt the turntable day and night! like at a radio station  but for normal home use!  THANKS! Ali

[JaS]

Great - you can enjoy the music now without worrying about your setup going up in smoke!
For completeness, and in case anyone else needs the information, I've tabled the rated specs taken from SP10 mkII motor units below.

Regards,
JaS



Motor Unit ---------PSU ---------- 5V ----------- 32.5V ----- 140V

Sp10 mkII ------- SH10-E ------- 0.028A ------ 0.22A ----- 0.005A

SP10 mkIIa ------ SH-10EA ----- 0.015A ------ 0.25A ----- 0.007A

SP10 mIIp ------- SH-10EP ------1.08A -------- 0.22A ----- 0.005A

[PhilShea]

hanks for the info. I wasn't aware that the unit also used 140VDC. I'll refer to the "p" manual for pinout and I'll probably resort to using a combination of adjustable off-the-shelf modular supplies.

[mikkelbreiler2]

I have Technics SP 10 Mk2A turntable that I am using with Technics   SH 10E power supply unit which was for SP 10Mk2 and not the SP 10mk2A . The STRANGE! thing is that my turntable is working very well with the this older 10E power supply meant for the SP 10Mk2 please  the letter A in the model number is the newer version of the SP 10 Mk2 . Iam a little concerned as the back of my  SP 10 Mk2A says to use it with only SH 10E"A"  power supply the A in the model number being for the SP10mK2A.  Will some nice soul advise me?!! THANKS!

Just to mention that when a PSU says it must be used with A Certain Gizmo it means that the PSU is designed and meant for use with A Certain Gizmo, which makes perfect sense as revision A may not have been on their mind at all.

A manufacturer does not want to make something people can use in different ways and still honor the warranty, when they use combinations that will not work well, especially against guidance not to do so - and common sense.

Some uses may work out well, while other uses will shorten the life of the devices or one of them.

I am pretty sure that had Technics anticipated there would be more revisions, minor or major there would still be a firm indication of which gear the power supplies are used with as far as the corporate warranty is concerned.

-Mikkel