Denon dp-80 (and other vintage direct drives) vs modern turntables

How much would you like to bet? Or maybe you’re just thinking of an average sample. I had the single chip, the transistors, and the electrolytic caps replaced in mine, and it was then calibrated. It’s now mounted in slate with a Triplanar. I kept it over an SP10 mk2.

Borrow a “modern” DD TT and do the same measurements with it. iPhone is not a reliable device for super accurate measure of TT speed and centering it on a cup is added guesswork. Unless you’re contemplating spending at least $5K or more on a new TT, the DP80 is most certainly worth the effort. And anyway, what do you think it needs? Seems fine to me. You’ve said these measurements are slightly better than those obtained with your Lenco.

Rockness, how are you measuring speed? Had the platter been spinning for a while before measurements were made, to allow for warm-up? Anyway, the max and min speeds are not bad, except that the variance occurs over only 10 seconds. I think you’ll find similar results or worse for any “good” TT. I just wonder how the measurement was made to get such instantaneous data.

In the owners manual for the DP80, Denon suggested that the bearing “never” would require a regular service, although it’s unlikely they envisioned a 45-50 year lifespan. Although I’ve upgraded the capacitors, transistors, the single IC, and the plinth on my unit, I’ve never fiddled with the bearing. I intend to at some point in time.

It is not wise to replace the ball bearing without also taking into account the material used as thrust pad, because some materials are not compatible in terms of wear factor. 

DP80 is a great turntable if working properly. However at this late date, any sample that has never been serviced, ought to be. Your description that the tape is “stretched” sounds ominous but if it holds speed I’d leave it alone; I have not heard or read that anyone can repair or replace it. There are some transistors that can fail and can be updated with better parts, and of course the electrolytic caps ought to be evaluated. What modern direct drive did you have in mind for comparison? Your question is too broad.