Leaderboard

Some pics of the motor housing restoration / upgrade, as everything got back from the polisher today (excuse the fingerprints). My previous DIY motor housings have just had a top plate with the motor attached. This one actually clamps the motor against a piece of sorbothane sheeting which resulted in a lot less noise at the platter. Now I need to work on the motor controller

Thanks Alan. I'll give that a read. Interesting that it's from back in the day Here's a rendering of what the amp will look like. It will be about 70 x 150 x 24 mm. We're looking at using USB-C PD so we'll be able to run off of most chargers (at least 20W). Power input will have a boost/buck converter so it could run off of 5/9/15/20V chargers. Still some work ahead, but we think we'll be able to fit a DAC in as well.

That happened entirely too fast!

A new record that Marc sent to me...

In progress Amp design by me, power supply designs and circuit board layout by kerry, support by birgir +/-300 volt power supplies. complementary push pull all bipolar design with cmos style multiplying current mirror.

Here is part of the controller - a battery charger circuit named after Zeus’ favorite projectile. Apparently I can’t center the white box on the side where the circuit notes go, but otherwise looks pretty slick - about the size of a matchbox. Won’t be solar powered, as the LT3652 datasheet might suggest though the stacked TH and SMD connectors are from JST.

^ A beautiful record. A nice album to put my TT rig through its paces as well. It did quite well. I think this is my new reference album. Thanks Marc!

Cool - hope you enjoy it!

So very interesting! The name was barely recognizable to me, but what a fascinating article and person!

hex inverter multiplier https://www.schematicsforfree.com/archive/file/Power Electronics/Power Supplies & Regulators/High Voltage 200V+/Voltage Multipliers.pdf (5) 4049 ICs, quiesent draw something like 250uA plus actual circuit draw. 555 V cheers Alan

Early 80s Japanese in-wall system:

Be aware. Recommended torque for 10PPSG is 0.565Nm to 0.678Nm. See attached Page from Aavid-Board-Level-Heatsinks-Catalog-2018-1507171.pdf for reference. I use this setting ...and I don’t know how to convert Ncm from Nm 😢

They lost credibility with the Titanic movie poster.

Aaron Rose, Photographer In Isolation, Dies at 84 https://www.nytimes.com/2021/03/11/arts/aaron-rose-photographer-dead.html?referringSource=articleShare Mr. Rose made his own cameras and other devices, and Rebecca Hackemann, who was his assistant and archivist from 1999 to 2005, said his studio was a sight to behold. “It was littered with glass and silver globes, optical devices and cameras he had built himself that replaced lenses with pinholes,” she said by email. “It was like walking into a different century.” In his darkroom, he spurned the ready-made chemicals available from Kodak and other manufacturers; its walls were lined with bottles and cans full of mysterious substances.

Lou Ottens, Inventor Of The Cassette Tape, Has Died https://www.rollingstone.com/music/music-news/lou-ottens-inventor-audio-cassette-tape-dead-obit-1139657/ https://www.npr.org/2021/03/10/975598869/lou-ottens-inventor-of-the-cassette-tape-has-died