Test Equipment Anonymous (TEA) group therapy thread

[capt bullshot]

Playing with the Keithley 238:

What's missing on the photo?

Front panel inputs. 

Yes, it's kind of annoying having rear triax connectors only.

Anyway, wrong answer.

BU508A: There's a proper decimal point between 0 and 9, so wrong answer too.


Hint: There's a resistor, an Ampere setting and a Volts reading ...

[Ice-Tea]

Mnem would say a coat of Tektronix blue?

[capt bullshot]

Mnem would say a coat of Tektronix blue?

NIce plan, but wrong answer.

Hint: It's the TEA forum, and there's some more fetish available other than Tek blue ...

[Robert763]

Any one have any idea what kind of HV plug type needed for the big white HV terminal ? Is that proprietary ?

The leads for your tester are probably these, hopefully you will be able to find something to fit.


David

Fairly common for HV kit. It's a standard 4mm plug screwed into the end of a plastic rod. Ideally turn one up on a lathe. A 4mm Plug soldered onto a bit of large coax center conductor and dielectric makes a good alternative. might need a bit of heatshrink to make up he diameter. Even better if you can get a bit of plastic tube that is a good fit and glue a plug into the end of that.
 

David, thanks. 

That white plug, looks like a mutant banana to me, as it has non standard long body. 

[BU508A]

Okay, you've set the CC to 10nA, you are measuring nearly 1V, therefore this is a 100GOhm resistor.
Looking at the cables I'd say they should be better proper PTFE insulated cables.
And you should have something like this:

[capt bullshot]

Okay, you've set the CC to 10nA, you are measuring nearly 1V, therefore this is a 100GOhm resistor.

Mhhh ...

You're clearly in need of the thing that is missing on the photo ...

[VK5RC]

Playing with the Keithley 238:

What's missing on the photo?

Front panel inputs. 

Yes, it's kind of annoying having rear triax connectors only.

Anyway, wrong answer.

BU508A: There's a proper decimal point between 0 and 9, so wrong answer too.


Hint: There's a resistor, an Ampere setting and a Volts reading ...

The cabling doesn't seem to be intact, it goes off screen, also at nA don't you have to be much more careful of shielded cables, ptfe pref, also the resistor and cable sitting on the top of a ? metal earth shield of the smu, shouldn't the DUT be shielded separately and be up at the potential of the source, ie proper triax set up?
(Takes off pedants hat)
Rob
(sore after a 7m long tumble off my mountain bike down a 30degree slope and 5 sutures to my lower lip - where the f****g bike hit me)

[capt bullshot]

The cabling doesn't seem to be intact, it goes off screen, also at nA don't you have to be much more careful of shielded cables, ptfe pref, also the resistor and cable sitting on the top of a ? metal earth shield of the smu, shouldn't the DUT be shielded separately and be up at the potential of the source, ie proper triax set up?
(Takes off pedants hat)

Yes, it's a bodge, but the reading is correct and stable. So wrong answer too.

Rob
(sore after a 7m long tumble off my mountain bike down a 30degree slope and 5 sutures to my lower lip - where the f****g bike hit me)

Please don't kill yourself mountain biking. I've got a colleague here who broke some bone in his wrist that turned now into a permanent damage.

[tonyalbus]

Playing with the Keithley 238:

What's missing on the photo?

Front panel inputs. 

Yes, it's kind of annoying having rear triax connectors only.

Anyway, wrong answer.

BU508A: There's a proper decimal point between 0 and 9, so wrong answer too.


Hint: There's a resistor, an Ampere setting and a Volts reading ...

a propper operator 

[bd139]

Rob
(sore after a 7m long tumble off my mountain bike down a 30degree slope and 5 sutures to my lower lip - where the f****g bike hit me)

Please don't kill yourself mountain biking. I've got a colleague here who broke some bone in his wrist that turned now into a permanent damage.

This. My immediate counterpart smashed the crap out of himself a month before I broke my arm (which is now healed) and isn't any better as such yet 

Fortunately he's a miserable bastard like myself so there isn't a lot of difference 

Edit: no sign of tinySA dispatch yet despite arrival and tracking ID for Thursday. Wonder how good our drop shippers are this week...

[capt bullshot]

a propper operator 

That's quite near ...

[BU508A]

Okay, you've set the CC to 10nA, you are measuring nearly 1V, therefore this is a 100GOhm resistor.

Mhhh ...

You're clearly in need of the thing that is missing on the photo ...

Okok, it is 100MOhm     

[capt bullshot]

Well chosen.

Edit: see the small picture for the proper operator ...

[med6753]

I'll just leave this here before retiring for the evening and sleeping guilt free. 

NOTE..... I strongly suggest that if you have a weak constitution you close your browser immediately and call your shrink.  This could scar you for life. You have been warned.

"Sacrificed so that ours may live"   

OMG you did not make a 'scope tube clock' out of you 465, did you? 

Nope, I do have my limits and I would not resort to that kind of carnage.  This 465 did work at one time or I should say several times between failures. For some reason it just couldn't keep running and would puke it's PSU. I fix and shortly after puke again. Also had vertical attenuator issues. So it became a parts mule. It's biggest sacrifice was the CRT to fix a 465B with a CRT that had focus issues. I also sold the Trigger IC's to a fellow blog member. The DM44 was sold to someone on the Tek Facebook group. Almost like an organ donor program. 

[Robert763]

Realised that I had several hand held meters out so I did a photo op

[VK5RC]

Rob
(sore after a 7m long tumble off my mountain bike down a 30degree slope and 5 sutures to my lower lip - where the f****g bike hit me)

Please don't kill yourself mountain biking. I've got a colleague here who broke some bone in his wrist that turned now into a permanent damage.

This. My immediate counterpart smashed the crap out of himself a month before I broke my arm (which is now healed) and isn't any better as such yet 

Fortunately he's a miserable bastard like myself so there isn't a lot of difference 

Edit: no sign of tinySA dispatch yet despite arrival and tracking ID for Thursday. Wonder how good our drop shippers are this week...

I have been riding a lot - since 16yo, moving to mountain biking from road, the cars (well their drivers) on the road is really what scare me now, you don't walk away if a car hits you.
Bugger re the arm bd!

[med6753]

I guess I scared him off. Asks for help. Offer it. Crickets. 

I don't bite, I really am a nice guy. 

https://www.eevblog.com/forum/testgear/need-vertical-position-fiber-glass-shaft-for-465/

[mnementh]

Any one have any idea what kind of HV plug type needed for the big white HV terminal ? Is that proprietary ?

The leads for your tester are probably these, hopefully you will be able to find something to fit.   

David

David, thanks.     That white plug, looks like a mutant banana to me, as it has non standard long body. 

STILL looks like a job for 3DP to me. 

mnem

[FransW]

Robert763:

Industrial archeology?

[McBryce]

I'm not sure I'd trust 3D printed parts for HV. ABS is a sponge and PLA is full of air pockets. What the breakdown voltage? Creepage distance etc? No idea, then I wouldn't put it between me and a kV source. The original parts look like they are Nylon.

McBryce.

[BravoV]

Any one have any idea what kind of HV plug type needed for the big white HV terminal ? Is that proprietary ?

The leads for your tester are probably these, hopefully you will be able to find something to fit.   

David

David, thanks.     That white plug, looks like a mutant banana to me, as it has non standard long body. 

STILL looks like a job for 3DP to me. 

mnem

You sound exactly like the voice in my head, the one with horn & fork. 

While the other voice says ... Don't you dare even stare at that 3DP rabbit hole !!!   

[BravoV]

I'm not sure I'd trust 3D printed parts for HV. ABS is a sponge and PLA is full of air pockets. What the breakdown voltage? Creepage distance etc? No idea, then I wouldn't put it between me and a kV source. The original parts look like they are Nylon.

McBryce.

Yeah, this is what I'm wondering about as this thing generates 5kV AC.

[Robert763]

Robert763:

Industrial archeology?

The most used are the Fluke 8060As

[mnementh]

I'm not sure I'd trust 3D printed parts for HV. ABS is a sponge and PLA is full of air pockets. What the breakdown voltage? Creepage distance etc? No idea, then I wouldn't put it between me and a kV source. The original parts look like they are Nylon.

McBryce.

WTFE.     If you're handling that bit while its live, you DESERVE what you get. 

EDIT: The Probulator end... yeah, I agree. I wouldn't print that; except maybe a hand-grip to go around a nylon, FR4 or glass tube which would be the actual probe.

EDIT-EDIT: Dang... woudja lookit that scary-ass HV cable with just a alligator on the end...? That's like... TURBO Suicide Cord; for when the usual AC Line Suicide cord isn't fast enough...  

mnem
 

[mnementh]

Any one have any idea what kind of HV plug type needed for the big white HV terminal ? Is that proprietary ?

The leads for your tester are probably these, hopefully you will be able to find something to fit.   

David

David, thanks.     That white plug, looks like a mutant banana to me, as it has non standard long body. 

STILL looks like a job for 3DP to me. 

mnem

You sound exactly like the voice in my head, the one with horn & fork. 

While the other voice says ... Don't you dare even stare at that 3DP rabbit hole !!!   

Also... welcome to Probulator Club. 

mnem