• Aluminium - Linn, Thorens etc


• Akryl - ClearAudio, Pro-Ject m.fl.


• Glas - Rega m.fl.


• Keramik - Rega


• MDF - Project


• Ingen tallrik alls, bara kontaktpunkter - Transcriptor

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Tror att flera av de äldre spelarna använde zink i sina talrikar, bland andra Thorens.

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Det är kul att man verkligen talar i nattmössan när man inte tycker som vissa... Abonnemang på sanningen är en ynnest förbehållen despoter...

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Universal RSR for practically all turntables

The design and names 'Universal Record Stabilizing Ring' and 'The Universal RSR' are Copyright 2003-2007 by Rudolf A. Bruil.

Mechanics, Mass and Music

The ring puts the record down at its periphery. The center weight or clamp placed over the spindle does the same at the position of the label. The result is that the engraved part of the record lays as flat as possible on the mat/platter. Shifting of the record is less possible.

By placing a weight over the spindle, many have already experienced an improvement. Those who own a peripheral ring have heard that an even better contact has its effect on the signal.

Because of the improved contact between record and mat, there is mass added to the record. The mass and effectiveness depend on the weight of the platter and the weight of the peripheral ring. In all events the resonance frequency of the record itself is lowered (Fs). But it will also be decreased in level (dB).
The heavier the ring and center weight, the lower the frequency and the decrease in level.
This means that the resonance frequency is positioned farther away from the audio band and it has a different influence on the signal, even though 20 Hertz is accepted as the low frequency of the audio band.

By using a ring and center weight, the generation of vibrations by the cartridge riding in the groove is decreased as well. Vibrations occur in all materials, but in this case especially in records beause of the "softness" of the vinyl. The softness of the vinyl varies from label to label and from era to era.

It is probable that in a record made of diamond (if that was possible), vibrations will not occur or if they would occur, they will be positioned outside the audio band far above 20.000 Hz. and at a very low level. Stiffer and heavier materials generate less vibrations and resonances.
The use of a peripheral ring on 78 RPM shellac records is not necessary and not advised.

The acoustic properties of the peripheral ring and the center weight will not only alter the fundamental frequency of the record, but will also have an effect on the audio band itself, its level and the frequency characteristic.

A ring of heavy metal will change the frequeny characteristic. It works like a filter and the filter ation starts with the low frequencies and is translated in the sound of the mid and the high frequency bands.
We found that a light metal ring will accentuate the mid and high frequencies.
A light metal ring will not lower the fundamental frequency of the record sufficiently.
Furthermore a light metal ring will emphasize the high frequency content of the sound. Although sound does travel at a convenient speed in acrylic, this material will behave in a different way.

The URSR is a sandwich construction using different materials: stainless steel, acrylic, and a certain type of glue. These all have different properties:
fundamental frequency, frequency charateristic, speed of propagation at different levels and frequencies. The proportions of these materials are significant.

There are variations in the combination of these materials possible.
For example by increasing the acrylic mass. This will not only alter the fundamental frequency of the ring, but also the frequency characteristic because of the dampening effect of acrylic in the ring. There is a difference in the propagation of sound in arylic, at a different frequency, compared to stainless steel. By using too much acrylic, the sound was less detailed in the midband. That was our experience.
It is necessary to find a balanced proportion of stainless steel and acrylic to arrive at the desired frequency characteristic and the wide frequency band. If in the end the ring would be nickle plated, the sound will differ also from a non plated ring.

We found out that a peripheral ring should have a certain weight in order to improve the contact between reord and mat. It should however not be too heavy.
It should lower the fundamental frequency of the record.
The ring itself should have a specific fundamental frequency.
It also should have an even (harmonious) frequency characteristic.
Only than it can do justice to the music engraved in the vinyl.

It is obvious that the creation of the Universal Record Stabilizing Ring was the result of experiments, later combined with reasoning.
It is indicated that the "right" platter of a turntable would not be just plain acrylic, but is that one which is a combination of acrylic and stainless steel or acrylic and aluminum, but in the "correct" proportions. That would need more emperical research.

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Ujujuj nu kommer vi in på riktigt bra saker en större diameter med vikten koncentrerad till periferin har gynnsamma egenskaper men att det bara är 300mm tallrikar är att de är enklare att tillverka. Tänk att få ha en tallrik på 40mm och 10-20kg med all massa på ytterkanten det hade varit optimalt en som kan detta bättre är esl.

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Min stereo: Hemmabygge, hemmabygge, hemmabygge, hemmabygge, köpe cdspelare, hemmabygge.

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