That's a snazzy cleaner, Pat. Don't get too carried away or you may have to wear sunglasses in the lab when everything starts shining.
LMAO! I seriously doubt that will ever become a problem, but it will be nice for bathing boards, cleaning knobs & whatnot, and will also likely find itself buzzing small engine and machine parts as well. I've had my eye on one for a year or more (since starting to watch Louis' videos, and getting stuff with 20 years of crud on it from Apex). Wound up getting some O/T a few weeks ago, so I had some $$ burning a hole in my pocket. Needless to say, it burned its way through...
-Pat
... but it will be nice for bathing boards, cleaning knobs & whatnot, and will also likely find itself buzzing small engine and machine parts as well.
Having to assemble a 1.7mH, 200A inductor assembly made of totally $4750 of toroidal magnetic cores and $1000 of litz wires.
I tried to do 1/16 of the job today, and it is really exhausting, especially the tinning part of litz wires. So I ordered a tin pot, a solder bar and a bottle of liquid flux.
Why is the wire so expensive, pure quantity of copper? Hopefully can post pics when its done.
No. Just typical litz wire, the only thing that makes it expensive is I need 1200ft of them, and by them, I mean 460 strands of AWG36 magnet wires bundled in a nylon sleeve.
There is also cost for insulation. My litz wire doesn't come with additional insulation, so I have to cover them with heat shrink tubing, which is very labor intensive and skill demanding.
Finally, to take high voltage, inductor core must be taped with hand cut Mylar strips and finished sub assemblies (I have 8 sub assemblies to form a large inductor) are held in place with double layer of 1/32'' rubber sheets, then cooling fans are installed.
So at the end of the day, it is nothing but a normal inductor, just this one costs $10k to build, which is not exactly expensive considering this is at the core of an 800kW converter.
Having to assemble a 1.7mH, 200A inductor assembly made of totally $4750 of toroidal magnetic cores and $1000 of litz wires.
I tried to do 1/16 of the job today, and it is really exhausting, especially the tinning part of litz wires. So I ordered a tin pot, a solder bar and a bottle of liquid flux.
Why is the wire so expensive, pure quantity of copper? Hopefully can post pics when its done.
No. Just typical litz wire, the only thing that makes it expensive is I need 1200ft of them, and by them, I mean 460 strands of AWG36 magnet wires bundled in a nylon sleeve.
There is also cost for insulation. My litz wire doesn't come with additional insulation, so I have to cover them with heat shrink tubing, which is very labor intensive and skill demanding.
Finally, to take high voltage, inductor core must be taped with hand cut Mylar strips and finished sub assemblies (I have 8 sub assemblies to form a large inductor) are held in place with double layer of 1/32'' rubber sheets, then cooling fans are installed.
So at the end of the day, it is nothing but a normal inductor, just this one costs $10k to build, which is not exactly expensive considering this is at the core of an 800kW converter.
... but it will be nice for bathing boards, cleaning knobs & whatnot, and will also likely find itself buzzing small engine and machine parts as well.
Yes, getting all the grime out of vintage knobs and other parts with lots of nooks & crannies. I remember some of robrenz amazing restorations. Looking forward to seeing how yours work out.
Picked up a couple of 'some assembly required' units.
First is an HP 6002A power supply. 50V, 10A, 200W with GPIB. No output. $40 plus shipping.
But wait! When I look at the back.......
Those two grey switches on the right. Not sure about the one on the right, but the one on the left sure looks like it's pushed in. No! Seriously?
Second unit is an HP 5065A Rubidium Standard. Top & bottom covers missing. Some companies do this to 'destroy' equipment before they dispose of it. Boo! Hiss! Kill all the lawyers - and bean counters!!
In the world of Rb Standards, these things are the gold standard. A few weeks ago, one sold untested for $1500. I got this one for $123.
Lots of fun coming up!
Ed
In the world of Rb Standards, these things are the gold standard. A few weeks ago, one sold untested for $1500. I got this one for $123.
Lots of fun coming up!
Ed
In the world of Rb Standards, these things are the gold standard. A few weeks ago, one sold untested for $1500. I got this one for $123.
Lots of fun coming up!
Ed
Does the 5065A work? I have top and bottom covers that would likely fit, not sure I'm ready to part with them yet though.
edit - well they looks like they would fit but they don't have the required vent holes, so never mind...
Looking forward to seeing a thread on it Ed.
The top and bottom I have are from a 5340A - same era and it looks like they would fit. If HP put vent holes in though they are probably needed.
A 30'' 30bpp CCFL monitor made by Dell. Got it for 1/3 the retail price it was, and had to drive to the owner's place (8 hrs!) to get it since he won't ship it.
$5 for a second hand HP 20S from a local OP Shop/Thrift Shop . Replacement LR44 batteries from the 2$ shop next door $7.50
A Terasic DE0-Standard FPGA board featuringAlteraIntel FPGA SoC with dual core Cortex-A9 and 110k LE of fabric and a few 3.125G SERDES, though the board doesn't break out any SERDES pins, so effectively this is a board without SERDES.
Got the board for free from Terasic, in return I have to provide them a demo application with all code available under MIT license.
The demo I proposed is a Linux music player that implements interpolating sigma delta DAC completely from scratch using FPGA fabric and ARM NEON instructions.