SL 1900 and antiskating? - diyAudio
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Old 12th January 2007, 11:06 AM   #1
TroelsM is offline TroelsM  Denmark
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Default SL 1900 and antiskating?

Hi.

I have to admit that I know close to nothing on how to setup a SL1900.

It plays records OK, but when i try to do light scratch it "jumps" one or two grooves back or forth.

I know its not intended for DJ'ing, but i suspect that it's a anti-skating problem.

How do I check if anti-skating is adjusted correctly, or even working?

I tried to place a mirror on the plate an placed the pickup on the mirror. The PU were quickly pulled towards the center. Is it supposed to do that?

I'm using a Ortofon nightclub PU. It's not the best for DJ'ing, but it should be OK.

The SL1900 is pretty beat up, but seems to be working. All hints on repair-guides or FAQ's would be appreciated.

Regards TroelsM
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Old 12th January 2007, 11:15 AM   #2
Netlist is offline Netlist  Belgium
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Here are some manuals, hope this helps:
http://www.vinylengine.com/library_m..._model=SL-1900

/Hugo
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Old 12th January 2007, 11:17 AM   #3
TroelsM is offline TroelsM  Denmark
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Thanks a lot.

Tried to "google" the manual, but came up without anything.

Any hints on the antiskating issue? I general?


Regards TroelsM
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Old 12th January 2007, 11:27 AM   #4
Netlist is offline Netlist  Belgium
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Technics recommends to set the anti-skating knob at the same value as the stylus pressure. Meaning that at 0 gram stylus pressure and anti-skating knob at 0, the arm should remain steady in any position you put it and not swing to the inner part of the platter.

/Hugo
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Old 12th January 2007, 11:49 AM   #5
TroelsM is offline TroelsM  Denmark
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Hi Netlist.

Thanks for the fast answer.

I get a pretty fast movement towards the center regardless of the antiskate-setting. Maybe the dial is broken. I'll try to take it apart.

Regards TroelsM
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Old 12th January 2007, 12:29 PM   #6
Netlist is offline Netlist  Belgium
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I never serviced the 1900 but from the drawing it seems that the anti-skating principle is similar to that of the SL1210.
A spring, griping a pin attached to the arm base regulates the anti-skating force. Dismantle the table to the point where you can see the spring in action. (Remove the bottom plate)
If this spring seems like doing its job, your tone arm is definitely broken. I doubt you will find a new replacement.

/Hugo
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Old 12th January 2007, 12:40 PM   #7
TroelsM is offline TroelsM  Denmark
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Hi.

I'll try to locate the spring and see if it's connected and in working order. If not I'll have to make an new antiskating-thingy.

That's the nice thing about mechanics... With enough tools you can repair most things :-)

Regards TroelsM
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Old 12th January 2007, 12:48 PM   #8
Netlist is offline Netlist  Belgium
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Quote:
Originally posted by TroelsM
If not I'll have to make an new antiskating-thingy.
No, the anti-skating thingy will most likely be in good working order. It will be the arm that needs to be remade.

-=Hugo=-
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Old 12th January 2007, 12:55 PM   #9
TroelsM is offline TroelsM  Denmark
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I know :-)

The arm seems to be fine. It moves freely and there's apparently no slack in the bearings.

I'll post again, if I find anything funny ones I get inside the SL1900.

Regards TroelsM
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