the recording sounds like it's from another world or not of this earth or it's as old as the Holy Bible, TURN YOUR HEADPHONES DOWN A BIT because there's some crackling, nothing funny, I don't know what caused it, the head works fine, I burned a few, maybe 15 fuses, the transducers didn't burn out [fortunately for me...]
Constructive comments are very welcome, [the dollar is falling, that worries me a bit...]
https://www.youtube.com/watch?v=q1ANU-cUu34
Re: Professional vinyl record lathe step by step
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Re: Professional vinyl record lathe step by step
Definitely some surface noise. What was the separation like? I don't know much about how DMM heads work so not sure I could offer any advice. I recall reading a theory that they utilised a 60khz carrier frequency to assist with cutting, though I think this was not the case but rather the head assembly was designed in such a way that the stylus had a natural vibration at 60khz when cutting, which in turn helped with cutting nice silent grooves. A bit beyond my knowledge though.
Re: Professional vinyl record lathe step by step
I made this recording to check the possibility of recording a 3-inch copper record in antiphase on the axis at 19 rpm and whether the voice would be understandable. As you can hear, the groove tracking is very good [30 microns], vertical modulation is stereo [no difference heard at all]. It is possible, so the experiment was a success.https://www.youtube.com/watch?v=McsOVNdNI5w
Re: Professional vinyl record lathe step by step
Conclusion.
In the brass head we used the design solution of the cutting head
Danish DSS and JVC clone included in the patent, it is wrong by design and it is not worth bothering with it. Heads constructed in this way do not work properly. We copied this Danish solution and we believe that it is bad from the ground up and we believe that they are not worth a pound of hair.
The correct design solution is the WESTREX USA head and its later German clones sx...etc.
Even a very simple design solution using small tweeters based on the principle of operation of WESTREX USA heads are at least ten orders of magnitude better than the bad ones I mentioned above.
In the brass head we used the design solution of the cutting head
Danish DSS and JVC clone included in the patent, it is wrong by design and it is not worth bothering with it. Heads constructed in this way do not work properly. We copied this Danish solution and we believe that it is bad from the ground up and we believe that they are not worth a pound of hair.
The correct design solution is the WESTREX USA head and its later German clones sx...etc.
Even a very simple design solution using small tweeters based on the principle of operation of WESTREX USA heads are at least ten orders of magnitude better than the bad ones I mentioned above.
You do not have the required permissions to view the files attached to this post.
Re: Professional vinyl record lathe step by step
https://www.youtube.com/watch?v=-9vGIbm9SlQ
Here is an example of a recording with a head made of computer speakers, it is difficult to determine the power of the speakers 1 to 2 Watts 8 Ohms, recording by pressing a groove with a stylus in the CD on a very primitive and light amateur device ... You can compare, not everything that looks like a pig and squeals like a pig is a real pig ....
Here is an example of a recording with a head made of computer speakers, it is difficult to determine the power of the speakers 1 to 2 Watts 8 Ohms, recording by pressing a groove with a stylus in the CD on a very primitive and light amateur device ... You can compare, not everything that looks like a pig and squeals like a pig is a real pig ....
Re: Professional vinyl record lathe step by step
SAL74B [SALOMON] input amplifier for a German system with low output level feedback heads. Personally, I think that the FB [red hrame ]amplifier developed by the Swiss company FS has better parameters than the original SAL 74B. We copied both and the Swiss FB amplifier made on the AMERICAN SMM2019BNZ symmetrical voltage amplifier has better dynamics, better symmetrical balance, lower noise, lower distortion. So the Swiss one is really worth recommending and is really good. Someone posted a diagram of this Swiss one. There is an error in the diagram. If anyone wants, I will indicate what needs to be added to make it work properly. [I answer emails directly here.swisse https://www.lathetrolls.com/download/file.php?id=13317&mode=view
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Re: Professional vinyl record lathe step by step
I didn't know where all this noise in my recordings came from, this signal comes from the power amplifier that I feed into the cutting heads, now I've connected the speakers. A lot of noise is introduced by the camera and microphones.https://www.youtube.com/watch?v=puSiewB1UIU
Re: Professional vinyl record lathe step by step
My PC monitor broke so I took out the plastic frame and cut it to a round size [quickly] it's smooth on one side, I don't know what material it is, plastic etc..., the blade cuts nicely. I recorded it with sapphire... something like thathttps://www.youtube.com/watch?v=97Wv8hYyDxg
Re: Professional vinyl record lathe step by step
Such a small sapphire embossing on a CDr [quite well and the voice is well understandable]/
Low recording level around -20dB, you can hear noise and the vacuum pump. I only turn off the vacuum pump from the 9th minute, you can't hear the air flowing in the recording. All in all, for amateur recordings, recordings on CDR are quite good.
But soon there will be a 14 [12] inch copper plate, electroplated, we'll see how it turns out. The plans include variable pitch and depth, maybe in 2-3 months the machine will be fully functional. I think it was worth doing, even for fun, but it's worth it, I suspect that King Edison would be very jealous of such sound quality... [even this analog recording on CDR]. https://www.youtube.com/watch?v=3Gmb0ffPk9o
Low recording level around -20dB, you can hear noise and the vacuum pump. I only turn off the vacuum pump from the 9th minute, you can't hear the air flowing in the recording. All in all, for amateur recordings, recordings on CDR are quite good.
But soon there will be a 14 [12] inch copper plate, electroplated, we'll see how it turns out. The plans include variable pitch and depth, maybe in 2-3 months the machine will be fully functional. I think it was worth doing, even for fun, but it's worth it, I suspect that King Edison would be very jealous of such sound quality... [even this analog recording on CDR].
https://www.youtube.com/watch?v=3Gmb0ffPk9o