What did you buy today? Post your latest purchase!

[jonovid]

1500 watt inverter 12v to 240v

[iJoseph2]

Some banana plugs and cable for speaker wires

Some XT60 connectors for battery packs

Meanwell PSU for external hard disk


https://www.aliexpress.com/item/1005004267177494.html

https://www.aliexpress.com/item/1005003058991433.html

https://www.ebay.co.uk/itm/284407596332

https://www.aliexpress.com/item/32995703291.html

[PlainName]

That capacitor must have terrible ESR!

[iJoseph2]

That capacitor must have terrible ESR!

Which one?

[PlainName]

The one that says 240V in, 5V out.

[Vincent]

...isn't that the power supply's label? 

Unless that was sarcasm LOL.

[PlainName]

Yes, a bit of tongue in cheek.   

[iJoseph2]

Yes, a bit of tongue in cheek.   

doh! you had me there 

[gamalot]

FLUKE 884X-SHORT LEAD from element14

Ordered on March 26, shipped on April 22, delivered on May 10, , in a HUGE box. 

I bought this six years ago at element14 for AU$40 and now I want to buy another one, I have seen clones on Aliexpress for as low as AU$20, but I think I don't mind spending AU$20 more at Fluke Brand and free express. So I went to element14 to place an order and I was stunned by the price!

[beanflying]

For shorts and such these look good No idea if he is here or not but I like the options https://www.ebay.com.au/usr/krasimir.k?_trksid=p2047675.m3561.l2559

[Dave]

For shorts and such these look good

They may look nice, but they're not good.

These will not actually behave as a proper 0 ohm short, because the current from the force terminals will affect the voltage between the sense terminals. Might not matter on a low-end meter, but it will definitely be visible on a 7.5 or 8.5 digit meter.
Take a look at how Fluke have done it.

[beanflying]

And just where was there any discussion about 8 1/2 digits  Maybe 2-3% IF THAT of the active member base have a meter in that class or plans to get one so for the other 97% GOOD is what they are!

As to 'low end meter' 5 or 6 1/2 is only that if you are a pretentious twit.

[daqq]

And just where was there any discussion about 8 1/2 digits  Maybe 2-3% IF THAT of the active member base have a meter in that class or plans to get one so for the other 97% GOOD is what they are!

As to 'low end meter' 5 or 6 1/2 is only that if you are a pretentious twit.

The point is that the design is objectively wrong and it's actually simpler to make it right.

[beanflying]

And just where was there any discussion about 8 1/2 digits  Maybe 2-3% IF THAT of the active member base have a meter in that class or plans to get one so for the other 97% GOOD is what they are!

As to 'low end meter' 5 or 6 1/2 is only that if you are a pretentious twit.

The point is that the design is objectively wrong and it's actually simpler to make it right.

If you are trying to make some sort of point on thermal issues caused by heavier traces then look at the 4mm Bananas and almost certainly mismatched materials and try again  When you get into the weeds of 8 1/2 digits and under PPM so be it but then far more likely you would be not using bananas at all.

Not the place for a Metrology discussion but some reading here on what is better practice for shorts https://au.flukecal.com/literature/electrical-calibration/watch-out-those-thermoelectric-voltages-cal-lab-journal-reprint

[armandine2]

light but not all laughs - SJ200 Gaussmeter

[Ed.Kloonk]

Gaussmetering is very serious business.

[jonpaul]

Bonjour à tous

Au Marche au Puces (Flea market) Porte de Vanve Paris...three  Italien  Moka posts,
a 1 and two, 3 cup..total  €10
one like new,  two need gaskets and through cleaning...


Also,  a vintage 1950s French police cap,
great condition, fits, the violet trim of a police radio spécialiste. €5

Bon week-end

Jon

[Dave]

And just where was there any discussion about 8 1/2 digits  Maybe 2-3% IF THAT of the active member base have a meter in that class or plans to get one so for the other 97% GOOD is what they are!

Coincidentally, that minority that obsesses over expensive multimeters and metrology is the exact target audience for a 4-wire short. The vendor is also marketing the product as such (attachment below).

Did some ballpark math based on the picture provided by the vendor. I estimate the short behaves as roughly 260μΩ when measured in 4W mode. This means it affects the least significant digit on a 6.5 digit meter with the lowest range of 100Ω, but more digits on more sensitive meters. My previous statement stands.

As to 'low end meter' 5 or 6 1/2 is only that if you are a pretentious twit.

You shilled a poorly designed product, get over it.

[beanflying]

And just where was there any discussion about 8 1/2 digits  Maybe 2-3% IF THAT of the active member base have a meter in that class or plans to get one so for the other 97% GOOD is what they are!

Coincidentally, that minority that obsesses over expensive multimeters and metrology is the exact target audience for a 4-wire short. The vendor is also marketing the product as such (attachment below).

Did some ballpark math based on the picture provided by the vendor. I estimate the short behaves as roughly 260μΩ when measured in 4W mode. This means it affects the least significant digit on a 6.5 digit meter with the lowest range of 100Ω, but more digits on more sensitive meters. My previous statement stands.

As to 'low end meter' 5 or 6 1/2 is only that if you are a pretentious twit.

You shilled a poorly designed product, get over it.

Your 'estimate' is almost certainly wrong and is based on your conclusion then worked backwards to 'prove' your LSD attempted point. Last time there was a THREAD on this I remember it was in the 10's of nV with this sort of layout well below the LSD on a 6 1/2 digit meter.

These are NOT aimed at the 8 1/2 digit crowd and by that show me anyone who is serious that is going to use Bananas in that situation for a start? Anyone with an 8 1/2 digit meter I would hope knows what is needed rather than attempting to underline in RED a portion of an evilbay listing. Try reading the Fluke link above as to what they consider a better practice. You might even learn something.

As to 'shilled' seriously  I offered a link to a 'good' alternate I have no idea who the manufacturer is and I have nothing to gain financially. Seriously get over your windbaggery!

[alm]

These are NOT aimed at the 8 1/2 digit crowd and by that show me anyone who is serious that is going to use Bananas in that situation for a start?

Well, probably most people owning a Keithley 2002

[beanflying]

These are NOT aimed at the 8 1/2 digit crowd and by that show me anyone who is serious that is going to use Bananas in that situation for a start?

Well, probably most people owning a Keithley 2002

Some rustic options here

https://www.eevblog.com/forum/testgear/diy-34401a-calibration/

[gamalot]

I bought some banana plugs to make my own 4 wire shorts, copying Fluke's layout is easy, the only problem is that they use 2.5mm PCB, I plan to use two PCBs stacked.

[RAPo]

On the local craigslist I bought an "Isolating amplifier switch" from ELWE  model M35.
It seems to be an apparatus that can present 3 signals on one scope channel.

[rdl]

Crucial 1TB SSD, CT1000BX500SSD1 on sale for $65, which is just about the only reason I could come up with for buying it.

https://www.amazon.com/Crucial-BX500-NAND-2-5-Inch-Internal/dp/B07YD579WM/

[jonpaul]

Bonjour a tous:

Weekend at flea market and street sale in Paris...

ensemble: lot was EU25!
Lamps: Osram prof. flash lamp and 1600W Xenon for cinéma projection
Swiss army knife  Arrow T25 cable stapler
Samsung DVD ext USB,
Four vintage dynamic microphones, 1950s..1960s...Beyer, Philips, Italian Geloso, unknown (any recognition?)
3 use DIN or Tuchel connectors, one 4 pin Amphenol 91. a few with cases/box/stand

Your thoughts appreciated!

Jon

PS: unknown USBC thing (what is?)