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Cleaning vinyl LP records

I was looking at ultrasonic cleaners, and came upon an unexpected use, reducing surface noise of old LPs: . Look in the...
39 comments posted 8mos
posted by joegwinn
39 comments posted 8mos posted by joegwinn

Funky hybrid regulator

The 6AC10 tube is kind of like 3 12AT7s in the same package, pretty sure everyone has one of those in their junk box.....
9 comments posted 8mos
posted by user
9 comments posted 8mos posted by user

noi siamo noi

ITALIAN MARS EXPEDITION with PNN spaceships that don't lose parts like Columbus' caravels and can reach Mars in 4 days...
50 comments posted 8mos
posted by user2039
50 comments posted 8mos posted by user2039

sottomarini trasformati in astronavi PNN

ITALIAN MARS EXPEDITION PROJECT with spaceships that don't lose parts and can reach Mars in 4 days https://propulsion-r...
4 comments posted 9mos
posted by user2039
4 comments posted 9mos posted by user2039

Dummy Load for Laser Driver Development

Gentlemen (IOW not you, Bill), I've got a bunch of green laser diodes which are specified for 370mA current draw. I've...
6 comments posted 9mos
posted by cd
6 comments posted 9mos posted by cd

cool dc/dc things

https://www.ti.com/product-category/power-management/dcdc-modules/isolated/products.html These things are tiny, cheap,...
12 comments posted 9mos
posted by jl
12 comments posted 9mos posted by jl

Pressure (air) sensor best practices

Any pointers regarding deployment of pressure sensors measuring air pressure? I'm looking at nominally an inch of water...
12 comments posted 9mos
posted by blockedofcourse
12 comments posted 9mos posted by blockedofcourse

GR Experimenters

https://www.worldradiohistory.com/Archive-Company-Publications/General_Radio_Experimenter.htm There was the HP Journal...
12 comments posted 9mos
posted by jl
12 comments posted 9mos posted by jl

Season's Greetings!

Gentlemen, It's 'that' time of year again and we've had some heated debates on this group over the last 12 months, both...
16 comments posted 9mos
posted by cd
16 comments posted 9mos posted by cd

Chinese EUV

https://finance.yahoo.com/news/exclusive-china-built-manhattan-project-141758929.html Lots of ebay stuff, I suspect. Joh...
46 comments posted 9mos
posted by jl
46 comments posted 9mos posted by jl

new power supply architecture

https://www.electronicdesign.com/resources/ideas-for-design/article/55339913/analog-devices-regulation-loop-without-a-r...
34 comments posted 9mos
posted by jl
34 comments posted 9mos posted by jl

Italian Expedition to the Planet Mars

It's now clear that arthritic rocket-powered astronautics lack the physical means to colonize either Mars or the Moon....
4 comments posted 9mos
posted by user2039
4 comments posted 9mos posted by user2039

driverless fun

https://www.sfgate.com/bayarea/article/waymo-temporarily-suspends-service-sf-amid-power-21254917.php John Larkin Highlan...
0 comments posted 9mos
posted by jl
0 comments posted 9mos posted by jl