PRO-JECT SPEED BOX Mk2

[Irakli]

Hi All,

Could any body tell me what is the output voltage fequency for
PRO-JECT SPEED BOX Mk2 ?
Here is the link
http://www.musicdirect.com/products/detail.asp?sku=ASUMSPEEDBOX

I have Thorens TD-166 with 17V AC motor (60Hz), and I want to try speedbox on it.

Thanks a lot.

 

[earsandeyes]

The box it self states 16V AC. I have not measured it. But it is in line withe standard RPM9 motor requirement.

I did notice that the PSU for the speedbox has approx 1.5 times the rating of the original supplied by the RPM9.

E&E

 

[Irakli]

Thanks, E&E

What I am interested in is the output frequency. is it 60Hz ?

 

[earsandeyes]

In our end of the world based on 50Hz, I assume 50 Hz when switched at 33 rpm and the right multiple when switched to 45 rpm. You don't have to switch the pully anymore, just push a button.
I also assume the US (60Hz) world has it's own version of the box. I have not yet opened it whether there are switchable or interchangeble parts.

E&E

 

[EC8010]

I have Thorens TD-166 with 17V AC motor (60Hz), and I want to try speedbox on it.

I didn't know there was a 17V version of the TD166. Are you sure the leading "1" isn't missing from 117V?

 

[Irakli]

Motor itself is AC 16V, 140ma (not 17V, my mistake) 🙂

 

[EC8010]

Fair enough. 16VRMS = 56Vpk-pk. Well within the capability of a cheap and cheerful chip amp. Time to make yourself a DIY turntable power supply, I feel.

 

[KJ42]

Hi All,

Could any body tell me what is the output voltage fequency for
PRO-JECT SPEED BOX Mk2 ?
Here is the link
http://www.musicdirect.com/products/detail.asp?sku=ASUMSPEEDBOX

I have Thorens TD-166 with 17V AC motor (60Hz), and I want to try speedbox on it.

Thanks a lot.

Hi,

I'm using the MK 1 SpeedBox on my Thorens 166 (both for 50 Hz), works like a charm. Though the phasing capacitor in my Thorens (not original cap) has the wrong size, so i doesn't work on 45 rpm output from the SpeedBox.

If you can't get at SpeedBox with 60Hz output for 33 1/3 rpm, you might consider changing the pulley on the motor in the Thorens. After-market pulleys made of aluminium or steel are available.

Best regards
KJ

 

[Irakli]

Thanks all for tips.
I've got my Speedbox MkII today from musicdirect.com.

First thing I measured an output frequency. So here it goes:
it is 45Hz on 33 setting and 60Hz on 45 setting (speedbox has a button switch for 33/45).
Works perfectly with my Thorens 166 (using 45 setting to play 33 records). There is no way to play 45 records with this setup. Oh well, I dont have any anyway 🙂

 

[tiefbassuebertr]

are there images from the PCB and a schematic ?
Thank you very much.
Maybe similar to this motor control unit:
Homebrew Motor Control Linn LP12 - Circuit Description wanted for Sine Wave Osc.