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Test Equipment Anonymous (TEA) group therapy thread

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Cerebus:
(Guess) Hall probe to tell you which way the current is flowing?

mansaxel:

--- Quote from: Brumby on July 15, 2022, 02:18:00 pm ---
Typically, except for some of the newer areas of Sydney (where things are underground and I've never investigated what is buried), you will find four wires strung from pole to pole down the street, making access to 3 phase physically straightforward to anyone who wants it.  From any given pole, several homes are fed and you will usually see a similar number of connections to each phase - so phase balancing by household.  It is really easy to identify the neutral. ;D

--- End quote ---
In Sweden, most single-occupancy homes have a buried 3x10+10mm2 cable, fed from a partly buried cabinet.



The cabinet usually feeds on the order of 10 houses and is on a ring mains of perhaps 3x95+69mm2 Al cable from a transformer that's typically around 100-300m away at most.



The 10sqmm cable will, at shorter lengths, allow 25A main fuses giving a total of 17,25kW power counted as single phase loads. It's fused in the buried cabinet, usually 35A, and then in the meter board at the customers ordered capacity.


--- Quote from: Brumby on July 15, 2022, 02:18:00 pm ---Microinverters feel like the appropriate direction, but that's just one of a couple of significant decisions that will require some homework.

--- End quote ---

Microinverters typically are EMC "tested" as single units and not with any significant cabling attached. Any possible practical application will deviate significantly from this easy scenario. As a result, both military signals units and civil aviation authority in Sweden have issued owners of installed microinverter systems with notices forbidding them to operate said devices. Even if you're not close enough to a facility of that kind, and even if you're prepared to ignore hams, imagine what such EMC rampage does to measuring gnat farts with your 3458A!

factory:

--- Quote from: mnementh on July 16, 2022, 05:30:18 pm ---
--- Quote from: med6753 on July 16, 2022, 05:13:41 pm ---
--- Quote from: Specmaster on July 16, 2022, 05:02:42 pm ---
--- Quote from: mnementh on July 16, 2022, 04:59:21 pm ---
--- Quote from: Specmaster on July 16, 2022, 04:27:39 pm ---
--- Quote from: bd139 on July 16, 2022, 04:14:29 pm ---Seen some shit in my time but this ...

   https://www.ebay.co.uk/itm/362782549796

 :palm: :palm: :palm:
--- End quote ---
Holy shit, I'm not surprised at it not working. It's like I said in another post, some people lack brains and what makes it even worse is that more than likely some stupid dipshit will more than likely buy this as well  :palm:
--- End quote ---

Hey, at least you can see everything that's been robbed off it before you waste your time & money... and if I were in dire need of something it actually has, I might pay more than I want to for it to save myself myself the guilt of robbing it off a decent example.  :-//

Just sayin'...

mnem
might, I say... might. If I were really desperate for that part.

--- End quote ---
Yep, you'd have to be really desperate for that part as after seeing the clear abuse it has been subjected to, their is real and dangerous possiblity that that part is going to be equally knackered one way or another  :-DD :-DD

--- End quote ---

WTF is that POS? I might use it for target practice.  :palm:
--- End quote ---

Naaah... not that bad. Timebase knob is in good shape, and it has those trapezoidal switch caps bd139 needs also in nice & black finish. I'd offer the moke 10 quid for it.



This is what I'd find more worrisome. Ships from the US but does not ship to the US. I know exactly where that is; I've been there. I suspect maybe they've had a irate customer come dot a eye for 'em or summat.  :-DD

I've seen this vendor before too; they're regulars in the "TE Junque" trade. :-//

mnem
 :-BROKE

--- End quote ---

That seller & others use separate listings, for different groups of countries they ship too, here it is with US shipping (+$28) https://www.ebay.com/itm/362707415754

Which is probably more than the knobs & transistors are worth.  :-DD

They are probably an E-waste company and like many others they sell some of it one ebay, others items are complete & not trashed. It's probably not worth their time to remove parts & list them separately.

David

mansaxel:

--- Quote from: tautech on July 15, 2022, 11:20:56 pm ---
--- Quote from: Vince on July 15, 2022, 10:55:51 pm ---That said, I think I could still downsize from 40+ to say 30 scopes.... maybe. Just... maybe.

--- End quote ---
Down to just 16 here however another 11 are coming and another 10 to follow that.
Downsizing is certainly possible and generally very beneficial.  :)

--- End quote ---

I feel inadequate at 5 of which 2 are in the repair queue.

OTOH, I've got a 5245L in the queue as well. On that one, my dirty secret is that I mighta zapped the 7V rail by gorilla-probing. Not a proud moment.

Electro-technique pics from today's museum visit:

Sign on a cabinet:



"Schematic included":



In my series of "stickers for laptops", those are probably close to the top in what I'd like to make.

dl6lr:

--- Quote from: factory on July 16, 2022, 08:47:55 pm ---That seller & others use separate listings, for different groups of countries they ship too, here it is with US shipping (+$28) https://www.ebay.com/itm/362707415754

--- End quote ---

I had contact with them as I am interested in 2 items. Shipping is of course expensive to EU ($4.00 in US, abt. $80.00 to EU), they offered combined shipping but did not enlist a personal ebay offer for me. And for some stupid reason ebay does not allow to send an inquiry for combined shipping, after trying to send it ebay refuses with a message the "seller indicated to not offer combined shipping".
Anyone from the US able and willing to forward to me? If yes, PM me.

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