PRO-JECT SPEED BOX Mk2 - diyAudio
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Old 6th April 2007, 07:49 PM   #1
Irakli is offline Irakli  United States
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Default PRO-JECT SPEED BOX Mk2

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/...u=ASUMSPEEDBOX

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

Thanks a lot.
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Old 7th April 2007, 06:53 AM   #2
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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.

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Old 7th April 2007, 08:09 AM   #3
Irakli is offline Irakli  United States
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Thanks, E&E

What I am interested in is the output frequency. is it 60Hz ?
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Old 7th April 2007, 09:55 AM   #4
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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.

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Old 7th April 2007, 10:10 AM   #5
EC8010 is offline EC8010  United Kingdom
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Default Re: PRO-JECT SPEED BOX Mk2

Quote:
Originally posted by Irakli
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?
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Old 9th April 2007, 05:50 AM   #6
Irakli is offline Irakli  United States
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Motor itself is AC 16V, 140ma (not 17V, my mistake)
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Old 9th April 2007, 04:23 PM   #7
EC8010 is offline EC8010  United Kingdom
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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.
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Old 11th April 2007, 05:36 PM   #8
KJ42 is offline KJ42  Norway
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Default Re: PRO-JECT SPEED BOX Mk2

Quote:
Originally posted by 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/...u=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
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Old 13th April 2007, 09:56 PM   #9
Irakli is offline Irakli  United States
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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
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