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Low cost ferrite

Hey As always, I am looking for saving cost (who isn't) I'm doing a new power design, and looking for cheap ferrite. Ru...
2 comments posted 5yrs
posted by klauskvik
2 comments posted 5yrs posted by klauskvik

Re: OT: 3D printer infill for round spacers?

It doesn't really matter since the force is almost always "down" relative to the print. I almost always use the old "re...
1 comments posted 5yrs
posted by dj
1 comments posted 5yrs posted by dj

Which ferrite material for 3-30MHz balun?

Attention, this is a non-political post, for a change :-) Getting back into ham radio after a decades-long hiatus I nee...
42 comments posted 5yrs
posted by news
42 comments posted 5yrs posted by news

OT: Carbon fiber reinforced foam

Could you build a re-inforced box-girder like structure out of rigid polystyrene foam by sandwiching it with carbon fib...
19 comments posted 5yrs
posted by user
19 comments posted 5yrs posted by user

differential signal detector

I probably won't use this one, but it is pleasingly weird. Watch for line wrap on the BAT15 model. Version 4 SHEET 1 17...
15 comments posted 5yrs
posted by jlarkin
15 comments posted 5yrs posted by jlarkin

faster PCB laminate

We normally make boards from FR4, specifically the Isola 370HR or equivalent. It's usually fine but is lossy for fast s...
15 comments posted 5yrs
posted by jlarkin
15 comments posted 5yrs posted by jlarkin

One cycle 50/60Hz RMS Calculation

My question is based on this paper: http://www.eletrica.ufpr.br/edu/artigos/CIL22-012_final_gerson.pdf They claim to ca...
23 comments posted 5yrs
posted by bluelectronx
23 comments posted 5yrs posted by bluelectronx

Rejuvenating SLAs

I've a dozen group 24 AGM batteries pulled from one of my UPSs as "approaching end of life" (easier to pull them while...
11 comments posted 5yrs
posted by blockedofcourse
11 comments posted 5yrs posted by blockedofcourse

Compact assembly workstation

Does any US-based seller make something like this? I need a compact assembly station to fit a tight space, plenty of ver...
26 comments posted 5yrs
posted by user
26 comments posted 5yrs posted by user

Dreadful DIN plug

This DIN plug has 8 or 9 components to assemble: And they show you the assembly procedure (why is it narrated by a teen...
20 comments posted 5yrs
posted by user
20 comments posted 5yrs posted by user

floating capacitance

This SD card tends to catch in the socket on insertion, which is a nuisance. https://www.dropbox.com/s/klqg94qgsqdpj8o/...
13 comments posted 5yrs
posted by jlarkin
13 comments posted 5yrs posted by jlarkin