[ARSCLIST] fwd: Modifying a linear turntable

[David Lennick <dlennick@xxxxxxxxxxxx>]

Anyone have any thoughts on this? Enrico Borsetti is an ARSC member but not 
subscribed to the list.


enrico borsetti wrote:
>  
> I had an idea recently regarding a modification on a turntable I have. I 
> am using for the 26th year my loyal Revox B790 linear tracking turntable 
> but it has only 33 and 45 speeds. I have many 78 rpm records and I want 
> to buy another  B790 since being linear tracking it gives no 
> aural distortion when the arm get close to the label as you know. The 
> speed control unit, which is made by easy to find IC's, should be 
> modified in manner to let the table spin at 78. I have the schematic of 
> the motherboard and arm control unit of the B790. Today the whole work 
> done by these old IC's can be made with a single PIC microcontroller 
> (http://en.wikipedia.org/wiki/PIC_microcontroller).
>  
> Do you know of any Electronic engineer (and record collector at the same 
> time) interested to take part in this 'upgrade' project?
> I think this 'upgrade' project could be of interest to many collectors 
> and our 78-L friends since this 'table pops-up often on ebay and at 
> reasonable prices, I saw it around $200/$300 in working condition. If 
> the upgrade will be produced in a certain quantity the motherboard cost 
> will be around $60 if not even less. So within $350 you can play your 
> 78's but with the quality of a linear tracking table!
>  
> Let me know what you think about it.
>  
> All the best   
> Enrico
> -------------------------------------------------------

Replies will be forwarded.  Thanks!

dl