What did you buy today? Post your latest purchase!

[armandine2]

...third lens came today - same model as the first, but this time a definite fault.

... very restricted travel on the focus ring, a few degrees of turn (from infinity to 1 metre).

described  as in good condition, 4 out 5.

...for those keeping score

England 10
Japan 7
France 0

...low score may get better - depending on recovering the cost. It was the most expensive of the three.

 

[paulca]

here is some interesting math about the tritium keychain
https://www.gammaspectacular.com/phpBB3/viewtopic.php?t=889

the skin exposure divided by area is interesting to me. thats a big number

But if you lose a hand due to this, you always have your teeth to make up for it.

The point in reading the above that I went, "Ah... hang on a minute there."

Was here:

If 2.7mS/y is for whole body exposure to background radiation and the odd higher source like a medical x-ray maybe we can assume that the entire area of the skin is exposed to this amount on average, so we can find the average exposure of 1cm of skin as follows:

I am fairly sure it doesn't work that way.

Also the experiment is invalid without measuring the xrays where are NOT absorbed but pass straight through.

If you have a choice to eat a radioactive cookie, ALWAYS pick the gamma cookie, if that has gone, pick the xray cookie.

[RAPo]

Le night with OHMITE

[w.v.s.]

Keithley 2400 broken as does not power on.
So hopefully it is a simple fix.
Will arrive next week 

Benno

Will you share some details on the fix here? Would be interested in reading that!

[beanflying]

Oops I differentialled AGAIN

I really need to get back to my clearance thread but sitting around in boring non Shack/Workshop places with idle hands leads to another Fluke to play with. I already own a better DC only one (895A) but a Fluke 887A AC/DC Null meter will be fun to play with.

[BennoG]

After refitting the power connector it powered on (verry dim display however).
But when powered off for 2 days it wont power on the first few times and than power on normally.
It looks like the internal 12V and 5V power is in hiccup mode (you can hear it restart)
I have a news display on the way and figuring out why the power supply is in hiccup-mode (overload or component age / fail)

Benno

[paulca]

A smoke alarm.
https://youtube.com/-LFgqZ97Afg

[tautech]

From RS
Small antistatic mat.
Antistatic gloves
25x 3W 3535 SMD LED's
HMC1118LP3D RF switches ..... any guesses what for ? 

[McBryce]

A book for the coffee table...

https://www.elektor.de/products/tektronix-epic-oscilloscopes

McBryce.

[tautech]

New local PC store.....one must support it right ?

2m HDMI cable
Logitech wireless mouse and KB set
64GB USB3 pen drive
5 port LAN switch.
300mm LAN cable
512GB SSD drive, USB3.2 and USB-C double ended thing.....I never knew they made them so small these days. 

[armandine2]

.. arrived today my GW Instek demo board - "education", not quite sure how this is going to pan out. 

[RAPo]

I've got the blues:


and a whole slew of other colours:

[gamalot]

Keithley 2510, there is a hole in the dilapidated front panel, but it still works fine.

Its main circuit board is different from the one in @Tin’s post many years ago. I will take some high-definition pictures later.

Some pictures here:

https://www.eevblog.com/forum/repair/teardown-keithley-2510-tec-smu-repair/msg5482231/#msg5482231

also some hi-res pictures here:

https://github.com/gamalot/Keithley-2510-Pictures

[coromonadalix]

2x GH18  rubber protector from Gossen Metrawatt 2x series  meters in Usa

Received some freebies

oh and this kit   Dranetz PMIT