Design process of my CD Pro2 transport which I make.
Total weight should be between 20 kg – 30 kg.
I’m trying to use the biggest weight possible same like high end turntables. I don’t believe in springs and other ridiculous solutions. I’ve got enough, how most of the manufactures of hi end CD players realize vibration dumping, you open $8k CD player and what you see? unmodified CD PRO2 transport on generic springs….
I’m looking for my inspiration in labs, where the vibration dumping ins made (in case of passive) by huge weight of table. Most of the time I’ve seen sand bags, silicon pads, elastomer. Still I don’t believe in springs, even if it can work for someone. I was looking for many different kinds of vibration dumping and magnetic levitation was very interesting in my eyes. In the end it was forbidden on DIY Audio forum as not effective.
Of course they are great ways to eliminate vibrations, such as professional active anti-vibration boards, air cushion etc. but I’m trying to do it at home.
CD Pro2 is generaly used as a top-loading (or you can purchase beautiful trays from Daisy company) transport. As a clamp I’ll use classical metal puck. Magnetic one probably works with same effectivity, but puck is more hifi 🙂 I was having look at data sheet and it shouldn’t be probme, if I don’t exceed 135g.
I was quite undecided in matter of design. I don’t want two box solution, it would be too much. Front panel should be perspex and gonna have fluorescent display and buttons on top. control servo and buttons shall be purchased from Tent labs.
I’ve had few days off, so I made a huge contribution to the design of my new CD Transport. There will be 3 major parts: Transport enclosure with spiked tripod, vibration isolation dumping platform and isolation transformer with power filter in separate enclosure (maybe will contain main switch). I put quite lot of effort to think through all eventualities and non-compromising stable vibration isolation (for home use). As written higher, lab-style vibration dumping is used. The biggest possible weight on silicon pads. There would be possibility to use air pump, but it might be too expensive and complicated etc. Simple solution wanted.
Used materials are alluminium, perspex, granite. All glued and screwed together. Entire weight approximately 20 kg for transport, 5 kg platform. Depends how much of granite I will be able to use. I find a local metal work company, so now my design can be much darer. I didn’t want some ready-made solution for sure.
Manufacturing will be in few major parts. Prototyping on MDF, making of transport enclosure, isolation transformer with filter and isolation platform.
High quality Neutrik connectors are used through. power in, I2S, S/PDIF RCA plug. I’m not sure if I need AES/EBU or Clock-in BNC connector
Front view, taken apart
Bottom view, hope you can see a gap between red base and suspended platform.
Front view, 1:1 ratio in parallel projection.
Front view, 1:1 ratio. Red base and suspended platform enclosure with vibration-dumping material. Squash balls, some sort of rubber, silicon or other form or vibration-absorbing material.
Dumping platform taken apart, tripod with spikes screwed to main transport enclosure.
Detail on the platform. Both parts should be attached freely.
Tripod with spikes from eBay, size of the other parts made to match it.
Transport will be screwed to tripod. Spikes are adjustable to achieve balance. (spirit level inside enclosure)
Unfolded, side cheeks are made of 20 mm thick alu. Silver metallic paint.
The main platform of transport is made off sandwich alu- granite – alu. Glued and screwed from sides.Predicted weight of granite is about 15 kg, I’m not sure abouth thickness yet, so weight can be different in the end.
Rear iso view, sections are divided by alu or copper plates. Attached to blue posts 10 mm x 10 mm
The same from different angle. Main transport will be hard screwed to sandwich. Probably will be covered by another alu black painted plate.
Front perspex and top strip. Logo and button symbols made by LED in enclosure, this will give me crisp symbols. Main goal minimalstic – clean design without any distortion.
One of the few things I havet sorted out yet is style top cover. Power and XO section will be covered.
2. design of top
3. design of top. As I said, I want cleanest design possible. Opening will be probably sorted by push button, same like push button draw.