My thoughts are: Get a Rabco SL8e, which is a better arm. Mount it on
anything that will accept the arm (Thorens TD124 or TD125 or Lenco in a
custom base, or....). I think you're going to run into problems and
frustration with this project. However, if you get it to work, please
post the modification on the internet. Thanks,
David Lennick wrote:
> 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
>> 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!