Not purchased today but delivered, some caps and banana plugs with missing terminal screws
Added a Keithley DMM7510 to the Lab, should be here Tuesday
Only problem is where to put it, darn thing is almost 17" long, my equipment shelf is only 14" deep. Gonna have to make a new shelf for it I guess.
Bought a milligram weighting scale:
It came in a fancy box, with a 5 g and 10 g reference weight as well (the 5 g reference shows 4.999 g and the 10 g reference shows 9.995 g). Needs 2 AAA batteries. I think it is very good quality for the price, I can recommend it if you need such a scale:
http://cgi.ebay.de/132225160852
I could have just as easily posted this in the TEA thread but will do so here. I was at the local candy store and grabbed a couple of computers, sans hard drives, with Pentium D processors and 4 Gb of ram for 2 for $10. I plan to put a hard drive in one and dip my toes in the pool that is Linux and see what I can learn. Not sure yet what to do with the other. The steal of the day was an HP 3312A function generator for $35. It needed a fuse and, as you can see, has 2 buttons broken. The power button presses fine with a small screwdriver and I can use a fingernail to depress the other. Now I have to do some Google Fu to see if I can find replacement buttons, or maybe someone here has a parts mule that they might be willing to sell me a couple?
Got myself an HP3245A universal source - many thanks to the seller MasterTech!
...also bought a Weller Zero Smog TL Kit. It's really silent, features variable fan speed, and the filtering consists of a pre-filter (pink in the fotos) and a HEPA fine part filter. However, the remote switch is a little peculiar: it only works when it is plugged in before switching on the main switch, and then pressing "1" means off and "0" means on.
I know it's just a joke, but I'm not sure the tax man will smile upon fraudulent invoices or the promise of them.
New big toy I just received: 150 pcs of TO247, 80mR, 1200V JFET. Gotta build a (hopefully) 100kV, optically triggered high speed 50ns Tr/Tf power switch.
Is that something commercially available or already tried out or are you just testing a new concept?
New big toy I just received: 150 pcs of TO247, 80mR, 1200V JFET. Gotta build a (hopefully) 100kV, optically triggered high speed 50ns Tr/Tf power switch.
Is that something commercially available or already tried out or are you just testing a new concept?
https://www.mouser.com/ProductDetail/USCi/UJN1208K/?qs=%2fha2pyFadugrmm1qxKNPlWgQ5o8iucv7kjh9giooOYs%3d
Devices are available, power module design is my own.
Top of the Mouser page says rdson is 80mR. Halfway down it says 230mR.
Edit - seems to be cold and hot values.
Please be
extremely careful with those high voltages.
We want you to remain a healthy participating member of this community for a long time to come.
New big toy I just received: 150 pcs of TO247, 80mR, 1200V JFET. Gotta build a (hopefully) 100kV, optically triggered high speed 50ns Tr/Tf power switch.
Is that something commercially available or already tried out or are you just testing a new concept?
https://www.mouser.com/ProductDetail/USCi/UJN1208K/?qs=%2fha2pyFadugrmm1qxKNPlWgQ5o8iucv7kjh9giooOYs%3d
Devices are available, power module design is my own.
New big toy I just received: 150 pcs of TO247, 80mR, 1200V JFET. Gotta build a (hopefully) 100kV, optically triggered high speed 50ns Tr/Tf power switch.
Is that something commercially available or already tried out or are you just testing a new concept?
Devices are available, power module design is my own.
Yes, I meant the concept of switching HV with a string of semiconductors. Cause I doubt youll be able to equalize all the gate voltages with that HV and steep pulse
essentially a human WDT.
A WHT perhapps?
If you mean someone standing by the main breaker, say so!!
This was standard practice with anything reasonably "hot", but most transmitters, for instance, do have
quite a lot of personnel protection built in.
Thousands of people in Transmitter sites, over decades, worked safely with high voltage equipment by the application of simple safe working rules.
In my own experience, nobody I worked with suffered severe Electric shocks causing injury..
Two people died in aircraft crashes, & two others in falls.
The "Aiieee! The sky is falling!" approach is counterproductive.
Working with high voltages is much less dangerous than the construction industry
I bought a Lecroy LC334a for parts or not working on Ebay for 200$. The oscilloscope doesn't turn on, we'll see if I can fix it. This is my Christmas gift to myself, I was looking for a 4 channels scope since a long time. If someone is selling PP06 probes I would be interested. Now I'm waiting for delivery......
essentially a human WDT.
A WHT perhapps?
If you mean someone standing by the main breaker, say so!!
Certainly. A
Watch
Human
Timer
R is quite effective in preventing accidents and keeping each other in check. You are absolutely correct in saying that, with proper procedure, equipment and techinques, high voltage is very safe.
Do they still use padlocks on breakers and doors?
I bought a Lecroy LC334a for parts or not working on Ebay for 200$. The oscilloscope doesn't turn on, we'll see if I can fix it. This is my Christmas gift to myself, I was looking for a 4 channels scope since a long time. If someone is selling PP06 probes I would be interested. Now I'm waiting for delivery......
I like how much it looks like a microwave in the thumbnail.
...also bought a Weller Zero Smog TL Kit. It's really silent, features variable fan speed, and the filtering consists of a pre-filter (pink in the fotos) and a HEPA fine part filter. However, the remote switch is a little peculiar: it only works when it is plugged in before switching on the main switch, and then pressing "1" means off and "0" means on.
Any change you can find the P/N of the motor being used in the Weller?
I bought a few things at a large local auction here in the UK and took delivery today. It was an auction for a factory closedown and there were lots of Thurlby PSUs on offer. I got a nearly new PL330D dual programmable supply (32V 3A dual with RS-232 and GPIB) really cheaply, also a Keithley 2000 bench meter and a TTi LD300 load.
https://uk.rs-online.com/web/p/electronic-loads/0535632/There must have been over a hundred Thurlby PSUs and there were so many they were being sold in lots of 6 or 9 at low prices. But there were a few programmable ones sold separately and I got lucky. I was tempted to buy 20 or 30 more PSUs and sell them on ebay but I don't want the hassle.
So you can expect to see lots and lots of Thurlby dual PSUs appearing on UK ebay in the coming weeks...