Nude Turntable Project

Dear Aigenga: Congratulations and welcome to the CLUB!

++++ " As far as plinth/no plinth, Lew and I just exchanged posts on Vinyl Asylum and he easily stated that bad plinths cause problems but that good plinths can be a benefit. My opinion is that good plinths sound better than bad plinths but at least in the case of good DD tables no plinth is even better. " +++++

Lewm is a very good friend and I respect him a lot, problem is that on that subject he is only speculating because he never gave/gives the opportunity to hear/test the DD non-plinth/nude alternative so he really can't know and can't affirm nothing about but only speculate against people like us that we know because we have the first hand experiences " before and after " the nude road.

Regards and enjoy the music,
R.

I picked up a TT-101 on eBay a couple of weeks ago. I was very happy to receive it in excellent condition! Going through the process now of figuring out how to build an arm pod etc. Probably going to take a while before it starts spinning records in the system, but it's a project for fun so not in any rush.

I think my first effort for the armpod is to have a relatively simple brass pod(need something pretty heavy, could be steel or bronze too) made that I can attach an extra aluminum armboard from my Galibier to. This would allow some flexibility, make use of things I already have and require a minimum of machining.

Some things I've noticed. The bottom "cage" definitely seems like a weak link. I can totally understand the need for damping it somehow. If I were to build a plinth of any kind I think I would just remove it entirely.

The bearing actually has an area at it's underside that would be easy to create a vibration sink for ala Albert Porter's plinth design for his SP10 Mk3. He uses a threaded brass rod screwed through a lead plate which is supported by his plinth to make contact with the bottom of the bearing in order to damp vibration. An interesting idea. Even without a plinth it seems like an area where some sort of damping may be easily applied.

On page 24 of the service manual it discusses the braking mechanism. It says to spin two heavy records (200g each) on the platter at 33rpm and push the stop button. Then adjust the VR647 on the circuit board to get it to stop fully. This VR647 pot(?) was pretty easily found and looks like it adjust with a small screwdriver. It says to do the same procedure but with one record at 45rpm. Got me thinking that maybe you could use a heavier mat or center weight and still adjust the brake to get it to stop. Anyone ever try adjusting this?

Anyways, first project is the armpod. I'll report back once I get that working. Excited to have a direct drive to play with!

Matt

Welcome to the nuded tt-101 club.

Ct0517 (Chris) has explicit written instructions on how to build a pod like the one you describe. I'm sure he'd be happy to email you a copy.

Ah! Thank you Banquo. That would be helpful.

Henry, You are in Positano? A very attractive women whom I met on a train only two days ago was on her way to JFK airport to catch a flight to.... Positano, Italy. Look for her, very short blond hair cut like a man's, mid-40s, the rest of her definitely does not resemble anything male. Of course, now I remember that there may be a Positano in Australia, given that one of my best friends has a summer home in Sorrento, near Melbourne.

Aigenga, I hate myself for taking the bait, but the fact that an idler drive sounds best in a well-designed plinth does not make it inherently inferior to other drive systems. Other drive systems present different unique issues that also have to be dealt with. Also, what I was trying to say about belt drives, however badly I phrased it, was that many current generation belt drives could be said to follow the no-plinth dictum but in fact they do have very elaborate underpinnings. What has been done away with is the wide open deck surrounding the platter. Losing that deck seems to result in a more open sound, possibly because it reduces direct reflections of sound energy emanating from the stylus/LP interface. (That's completely off the top of my head and possibly complete BS.) I think that's the major benefit of what you guys are doing, getting rid of the open deck. It's what I liked about Nottingham Analog tts. Yet in the last few years, the conventional plinth has reappeared among mainstream (i.e., <$10,000) belt drives. To wit, the VPI Classic, Well Tempered Amadeus, etc.