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Cartridge scraping on record, please Help

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Re: Cartridge scraping on record, please Help

Postby Alec124c41 » 05 Jan 2018 06:11

The stylus should rest on the protractor.
I don't understand the second question.
How is it sounding, now?

Cheers,
Alec
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Re: Cartridge scraping on record, please Help

Postby Sunwire » 05 Jan 2018 06:48

The db systems protractor has two parts. The top part is clear.
The instructions can be found on the db systems web site here (see DBP-10):
http://www.dbsystemsaudio.com/access.html
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Re: Cartridge scraping on record, please Help

Postby Alec124c41 » 05 Jan 2018 16:04

That is a clever design that allows for your choice of offset angle.
However, I am not seeing the usefulness of this feature. All you really need is to have the lines at right angles to each other, and markings for the chosen null points.
Perhaps it is meant as a measurement tool.

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Re: Cartridge scraping on record, please Help

Postby Sunwire » 05 Jan 2018 23:38

I own one of these, but don't have the transparent part.
It was lying around one of the shops where I worked back in the early 80s and was headed for the trash because the transparent part was missing.
After reading the instructions, I think the major advantage of the design is that using the transparent part gives you pretty specific guidance about how far back or forward you need to move the cartridge to get the overhang correct.
Beyond that, I don't see any advantage, but I may be missing something.
I use Conrad Hoffman's arc protractor generator tool.
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Re: Cartridge scraping on record, please Help

Postby i_like_macs » 13 Jan 2018 03:37

Alec124c41 wrote:The stylus should rest on the protractor.
I don't understand the second question.
How is it sounding, now?

Cheers,
Alec


I'm sorry for not replying sooner. I didn't see that new replies were posted on a newly created second page. I was repeatedly refreshing the first page wondering whether there were any new replies.

And thank you very much for answering my first question.

As for how my turntable is sounding, I have nothing to compare it to, but with the new cork mat (and much generous Help from Alec), the cartridge is at least not scraping on the record surface. I'm not primarily a vinyl listener, but resurrected the Systemdek IIX to digitize some records for my mom. What I'm noticing, especially on older records, are many clicks and pops, even after cleaning the records with a discwasher D4+ Record Care System brush and a Hunt EDA Carbon Fiber Record Cleaning Brush. Nevertheless, when digitizing records, I was surprised that the bass extended much deeper than I expected, although transients were not as well defined as in digital recordings. Also, the dynamic range of some records were much wider (i.e., around 60 dB) than expected. Another thing I noticed was rumbling noise, but perhaps this is part and parcel of the vinyl experience.

I know that there are nice record cleaners that use suction to remove dust from records, but unfortunately I don't have the money (or inclination) to purchase one...
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Re: Cartridge scraping on record, please Help

Postby Alec124c41 » 13 Jan 2018 05:39

With the Discwasher brush, use a small spray bottle, such as those that are used for cleaning glasses, to dampen the brush, then rotate the leading edge upward, as the record turns, to lift off the dust. I use 1 part isopropyl alcohol to 4 parts distilled water.
Lay the carbon fiber across the grooves of the rotating record, and slowly slide it off the edge, This avoids the line left by just lifting it.
Have you oiled the platter and motor bearings?

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Alec
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Re: Cartridge scraping on record, please Help

Postby i_like_macs » 13 Jan 2018 06:21

Oh, I see! I must try your spray bottle/rotate brush upward method additionally to sliding my Hunt brush off the record. I have been seeing a line of dust on the record otherwise! So I assume it's OK to have the turntable motor spin the record as I apply brushes. I was a little concerned that the turntable slows down considerably if I apply the Discwasher brush flat (i.e., parallel) to the record surface.

I have never applied oil to any part of the turntable. Is this important, and if so how is this accomplished?

I apologize that I only have questions, but am grateful for those of you like yourself who have answers.
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Re: Cartridge scraping on record, please Help

Postby Alec124c41 » 14 Jan 2018 06:20

We all have questions. That's how we get answers.
The platter bearing and the motor bearing are the moving parts.
Lift off the platter, and take out the sub-platter. If the oil is gunky, it should be cleaned out of the well, and off the shaft. I gather that a heavier oil is better for these, #30 machine oil or #90 gear oil. About 0.8 cc is recommended, if you have the pump bearing (Grooves in the shaft). For turntables with balls and plain shafts, I cover the ball in the well, and put a drop on the shaft.
Check the ball bearing at the bottom for wear.
For the motor, a drop of sewing machine oil on a small screwdriver, touched to the motor shaft under the pulley, will run down into the top motor bearing.
Some turntables slow down a lot, when you are cleaning a record. If necessary, you can Help it with a finger on the label.

Cheers,
Alec
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