Author Topic: Test Equipment Anonymous (TEA) group therapy thread (Read 18812735 times)

mnementh · « **Reply #86925 on:** March 31, 2021, 04:34:08 am »

This is the page to muster all our 3478As...

mnem
...now izz zee time on Schprokketts venn ve dawnnnce!!!

Brumby · « **Reply #86926 on:** March 31, 2021, 05:06:42 am »

Here's mine!

(I really must attend to that power button)

capt bullshot · « **Reply #86927 on:** March 31, 2021, 05:23:33 am »

Quote from: mnementh on March 31, 2021, 04:34:08 am

This is the page to muster all our 3478As...

I'm waiting for page 34401 ...

Zoli · « **Reply #86928 on:** March 31, 2021, 05:35:24 am »

Quote from: mnementh on March 30, 2021, 06:28:41 pm

Quote from: Zoli on March 30, 2021, 06:15:58 am
Congratulation, you've done a dam(pun intended) good job; now you have a good Mac video card, which I would recommend to use it only when needed. And for future references: the reflowing can be re-done a few times, if needed

Yeah, I'm studying the airflow through this thing right now; I have a couple ideas for ensuring it gets nice cold outside air in hopes of preventing future relapse. If this thing does wind up as my *NIX workstation, it may very well be on a high duty cycle, as I am old and pretty slow anymore.

The critical temperature is 60^oC, IIRC; that's the temperature when the underfill became jelly, and all the pressure from the heatsink will get transfered to the bumps - which, being softish material will compress a little bit. Cool down, the underfill became solid again, and will try to extend the bumps a bit. Repeat and rinse, until you have a dead videocard.
Conclusion: those videocards can have a long and happy life, if kept under to 50^oC.
The original articles which I was thinking to be on the semiaccurate, in fact were on theinquirer, and not available anymore. Original links:
http://www.theinquirer.net/inquirer/news/1004378/why-nvidia-chips-defective
http://www.theinquirer.net/inquirer/news/1013947/nvidia-should-defective-chips
http://www.theinquirer.net/inquirer/news/1036374/nv-should

AVGresponding · « **Reply #86929 on:** March 31, 2021, 05:36:21 am »

Quote from: capt bullshot on March 31, 2021, 05:23:33 am

Quote from: mnementh on March 31, 2021, 04:34:08 am

This is the page to muster all our 3478As...

I'm waiting for page 34401 ...

A long wait, but not as long as for my HP 66311B...

AVGresponding · « **Reply #86930 on:** March 31, 2021, 05:43:35 am »

Quote from: THDplusN_bad on March 30, 2021, 08:43:51 pm

[Blimey! Those conductors surely look impressive. What on earth are you working on - peak currents in the kiloAmps range?!

Cheers,

THDplusN_bad

Nah, that 4c 150mm² is rated for a bit over 300A/phase. The incomers are fused at 500A/phase, though at 300mm² are good for a bit more. I've seen incomers that size fused for 1250A/phase, but you're relying on the installation manager to do their job properly at that, re working load/load balancing, since the rated CC is 538A (had to cheat and look that up lol).

bd139 · « **Reply #86931 on:** March 31, 2021, 06:28:11 am »

Drop mine in quickly...

BU508A · « **Reply #86932 on:** March 31, 2021, 07:03:44 am »

Those 3478A are all nice and dandy, but where is the backlight?

bd139 · « **Reply #86933 on:** March 31, 2021, 07:06:37 am »

In the ceiling

They look much better and are easier to read than in photographs. The polariser tends to make them look lower contrast than they are.

Robert763 · « **Reply #86934 on:** March 31, 2021, 07:07:06 am »

Quote from: mnementh on March 31, 2021, 04:34:08 am

This is the page to muster all our 3478As...

mnem
...now izz zee time on Schprokketts venn ve dawnnnce!!!

Damm, had to sneak back couple of pages and add a photo of my 3476B

BU508A · « **Reply #86935 on:** March 31, 2021, 07:07:36 am »

How .... ingenious!

Edit:
I'm tempted to buy a 3478A just for the sake of modding it with a backlight.

https://www.eevblog.com/forum/projects/hp-3457a-lcd-backlight-mod-(also-for-3478a)/

wolfy007 · « **Reply #86936 on:** March 31, 2021, 07:28:17 am »

One of mine just after repair.

bd139 · « **Reply #86937 on:** March 31, 2021, 07:32:10 am »

Quote from: BU508A on March 31, 2021, 07:07:36 am

How .... ingenious!

Edit:
I'm tempted to buy a 3478A just for the sake of modding it with a backlight.

https://www.eevblog.com/forum/projects/hp-3457a-lcd-backlight-mod-(also-for-3478a)/

That looks like hassle to me

BU508A · « **Reply #86938 on:** March 31, 2021, 07:47:50 am »

The definition of "having fun" might be slightly different ...

beanflying · « **Reply #86939 on:** March 31, 2021, 08:23:48 am »

15 tips is 'aspirational' at this stage for my JBC. Beer was consumed during the making of this model so it was a win win so far

Must cook food or fall over .......

Ice-Tea · « **Reply #86940 on:** March 31, 2021, 09:03:12 am »

Just fried my Rigol DM3058E.

End of message. Carry on.

beanflying · « **Reply #86941 on:** March 31, 2021, 09:07:59 am »

Quote from: Ice-Tea on March 31, 2021, 09:03:12 am

Just fried my Rigol DM3058E.

End of message. Carry on.

Found you a 34401A you can buy to replace it

eBay auction: #143981804612 same seller seems to have a rough Solartron too.

Other than that

Ice-Tea · « **Reply #86942 on:** March 31, 2021, 09:12:32 am »

Lol, yeah, probably pulling the listing later today.

Specmaster · « **Reply #86943 on:** March 31, 2021, 09:22:05 am »

Quote from: mnementh on March 31, 2021, 04:34:08 am

This is the page to muster all our 3478As...

mnem
...now izz zee time on Schprokketts venn ve dawnnnce!!!

Shittt I'll have to wait right round to page 4503 now then... I think I'll take a kip in the meantime. $:=\$

tggzzz · « **Reply #86944 on:** March 31, 2021, 09:24:28 am »

Quote from: beanflying on March 31, 2021, 09:07:59 am

Quote from: Ice-Tea on March 31, 2021, 09:03:12 am
Just fried my Rigol DM3058E.

End of message. Carry on.

Found you a 34401A you can buy to replace it eBay auction: #143981804612 same seller seems to have a rough Solartron too.

He'll just have to stock up on 34410a and 7150 - there are plenty at Ramco next week

More interestingly, what did he do to fry it?

PA0PBZ · « **Reply #86945 on:** March 31, 2021, 09:26:21 am »

Still in time I hope

tggzzz · « **Reply #86946 on:** March 31, 2021, 09:27:09 am »

Quote from: Specmaster on March 31, 2021, 09:22:05 am

Shittt I'll have to wait right round to page 4503 now then... I think I'll take a kip in the meantime. $:=\$

Next page I'll post a picture of my first 100MHz scope.

Ice-Tea · « **Reply #86947 on:** March 31, 2021, 09:30:16 am »

Quote from: tggzzz on March 31, 2021, 09:24:28 am

Quote from: beanflying on March 31, 2021, 09:07:59 am
Quote from: Ice-Tea on March 31, 2021, 09:03:12 am
Just fried my Rigol DM3058E.

End of message. Carry on.

Found you a 34401A you can buy to replace it eBay auction: #143981804612 same seller seems to have a rough Solartron too.

He'll just have to stock up on 34410a and 7150 - there are plenty at Ramco next week

Already bookmarked

Quote

More interestingly, what did he do to fry it?

As it would seem, if you have a HV source and it's still set to 2kV when you turn it on, it should not be connected to a DM3058E. Who knew.

Robert763 · « **Reply #86948 on:** March 31, 2021, 09:40:26 am »

Quote from: Ice-Tea on March 31, 2021, 09:12:32 am

Lol, yeah, probably pulling the listing later today.

The advantage of proper DMMs like Fluke and HP - is they are a lot harder to fry. I remember our RS rep doing a demo with a 8020 back in about 1981. He intentionally connected it across thee mains while set to resistance

but it's a Fluke so

We bought one, hell I bought one and that was a LOT of money for me back then.

Ice-Tea · « **Reply #86949 on:** March 31, 2021, 09:43:45 am »

Yep. That's one of the reasons I sell 10 yo Agilents, Flukes, Keithleys, whatever for the price of modern Rigols or Sigilents.


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Author Topic: Test Equipment Anonymous (TEA) group therapy thread (Read 18812735 times)

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