Beogram 8002 platter

[Valentin Apostolov]

<pre id=”tw-target-text” class=”tw-data-text tw-text-large JgzqYd RES9jf tw-ta” dir=”ltr” tabindex=”-1″ role=”text” data-placeholder=”Превод” data-ved=”2ahUKEwiCsLilhZGVAxW2h_0HHafcNkMQ3ewLegQIDBAY” aria-label=”Преведен текст: Hello, can anyone who has a Beogram 8000 or 8002 please provide the dimensions and weight of the platter (thickness, diameter…), because I have a Beogram 8002 that is missing the top platter. My idea is to make my own platter.”>Hello, can anyone who has a Beogram 8000 or 8002 please provide the dimensions and weight of the platter (thickness, diameter…), because I have a Beogram 8002 that is missing the top platter. My idea is to make my own platter.

[Mark-sf]

The platter diameter is 300mm and the height is 24 mm; however, it was not a solid piece of aluminum as it was cast with the underside hollowed out. I believe the weight was around 1.5kg but was never published. A solid piece would be too heavy at about 4.6kg. This would require you to remove about 16.mm of material except for a 1-2mm outside edge. For this motor design it’s essential for the platter to be light weight as the servo system with its ~200mm rotor would be impaired by the higher inertia of a typical direct drive platter. You would also need to stencil the black ribs. The black rotor that supported the turntable platter was part of the motor. Do you have that?

• This reply was modified 3 weeks, 6 days ago by Mark-sf.
• This reply was modified 3 weeks, 6 days ago by Mark-sf.

[TK]

Platters also come up for sale quite frequently in various marketplaces, ranging from USD $50 to $100.  In the mean time, you might consider milling two solid discs with a diameter of 10cm each.  Place a layer of rubber on the bottom one for a bit of grip.  Place the bottom disc on the spindle with the rubber facing up, next the record, last the top disc as a weight to hold the record in place and level to the bottom disc surface.  You might need to make the top disc a bit heavier to provide additional stability.  I haven’t tried this myself, but I feel like it would work fine, provided it is balanced properly, and can compensate for the 1.5g of downward pressure provided by the tone arm.

 

 

[Mark-sf]

TK wrote:

Platters also come up for sale quite frequently in various marketplaces, ranging from USD $50 to $100.  In the mean time, you might consider milling two solid discs with a diameter of 10cm each.  Place a layer of rubber on the bottom one for a bit of grip.  Place the bottom disc on the spindle with the rubber facing up, next the record, last the top disc as a weight to hold the record in place and level to the bottom disc surface.  You might need to make the top disc a bit heavier to provide additional stability.  I haven’t tried this myself, but I feel like it would work fine, provided it is balanced properly, and can compensate for the 1.5g of downward pressure provided by the tone arm.

This is really not a good idea. First, the record need full support underneath which is 300mm. Secondly, for this motor design the correct weight is very important as there is a tight servo loop and additional weight can cause undesirable rotational inertia. Finally, the MMC1-4 cartridges tracked at 1.0 to 1.2 grams.

 

[Valentin Apostolov]

I need the exact dimensions of the platter, just the thin aluminum disc! Thank you!

[Valentin Apostolov]

Can any owner of this exact model measure the exact thickness and diameter? Thanks!

[Mark-sf]

I gave those to you already.

[Valentin Apostolov]

Hello, where can I find Technical Product Information for Beogram 8000 in pdf format (I’m not talking about the service manual)

[Mark-sf]

The speciations are at the end is the service manual.

[Valentin Apostolov]

No, I just need this, here it is described in detail how each block of the turntable works

[Valentin Apostolov]

Like this, just for example

[Mark-sf]

All of that type of information that is available is in the service manual. The schematic will show how it works, If you do not understand the operation from it then let us know the specific problem you are having.

[Author]

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