Pheonix Engineering Road Runner

@pbnaudio, what great timing, I was just running it through my mind why something like this has not been available. Will be nice to just look over while system is running and see exactly what it is doing without having to get out the Kab and set up the strobe. Thanks to sgunther for bringing this up.

 Peter, your comments lead me to believe that you have probably installed your tachometer on a few Denon turntables that you have restored. I am wondering whether you find that your tachometer is in agreement with the built in strobe device on Denon dd turntables. Which is to say, when the strobe image is stable, indicating 33.33 RPM, is the tachometer reading the expected value?
thanks.

Lewm

Yes indeed - the Denon DD's are very precise - I use the Tachometers on the DP80 Professional and the DN308 Professional.  The reading is 33.333 with the last number varying a slight bit,  they all lock in at "their" speed, which can be 33.334 or 33.332 and some at 33.333  The Oscillators are not adjustable on most of them - only the DP7000  and a few of the DP6000 have had adjustable oscillators.

Good Listening

Peter

DP80 also allows speed adjustment but I think it disengages the servo.

Lew

All the Denon DD’s I work on have Adjustable speed - however as you mention this disengage the servo control. What Im talking about above is the internal oscillator from which the speed control is derived, only the DP7000 allows for adjusting the clock speed (with a small adjustable capacitor) which for the DP7000 is 300kHz.

Good Listening

Peter