Two Tonearm Turntable: Need Suggestions

Haven't pursued the 78 option primarily because of time constraints.

Basically, all I need to do is to feed the controller from a 15 volt battery source and I'd be up and running. The regulator chip can take about 35 volts, so if you had two 12 V batteries in series (for 24 VDC), you'd be happenin'.

The bigger issue I have is whether I consider this type of rig appropriate for 78's. There's only one way to find out, isn't there?

Variable speed - via trim pots ... this was one of the main criteria we had for our controller design. I know too many people who are pitch sensitive and want to be able to correct for mis-mastered recordings.

Jim Hagerman has just submitted a prototype to me of a 3 speed controller. I need to start beta testing it. I consider Jim to be one of the unsung heros of audio.

The intended arrangement is for me to distribute the controller - assembled, tested, and supported by Jim. We're probably 6-8 months from anything final.

Cheers,
Thom @ Galibier
http://www.galibierdesign.com/prd_quattro_alu.html

Hi all,

Every time I give this topic some thought, I come to the same conclusion as Flyingred has.

The heck with my 'tables for playing 78's. Sure I can do it. It's a simple matter of having two batteries in series so that I can nudge the voltage past its current top speed of about 65rpm (infinitely adjustable).

I view a 78 based system as a completely different animal - requiring so many different components, with a completely different RIAA curve (phono stage) being just one of them.

If I were doing a 78 based system, it would be with an old turntable, a proper phono stage with multiple RIAA curves for all of the equalizations they used, and ... it would be MONO !!

Cheers,
Thom @ Galibier