What's this please? (Component Advice)

[Richard Crowley]

Yes, it certainly looks like a film resistor.
The resistance is the coating on the surface of the ceramic "plug".
The "slots" are probably where they "trimmed" the value with a laser.

You didn't mention WHY you removed it? (Or why you destroyed it?)
You can't tell the value (1K vs 3K3 or any other value) by looking at it.
Didn't you measure it?  Why would you think it is "1K"?
If the document says 3K3, then why would you want to put anything else in there?

[nicknails]

I have 4 Fluke 45's that were all damaged by either high voltage on the input or some sort of weird ground noise from testing a HV DC/DC converter. On a good Fluke 45, this measures 1K-Ohm dead nuts (in circuit). I took it apart because a good one measures 1K, but the diagram shows 3.3K.

I've attached the schematic and the parts list. Offending part is R5.

[Richard Crowley]

I don't see "3.3K" anywhere in the parts list. I see R5 shown as 3.5K
I also see that R5 and RT1 appear to have been hand-altered after the diagram was published.
Perhaps you have the wrong schematic for your make/model/serial number.

[jitter]

I have 4 Fluke 45's that were all damaged by either high voltage on the input or some sort of weird ground noise from testing a HV DC/DC converter. On a good Fluke 45, this measures 1K-Ohm dead nuts (in circuit). I took it apart because a good one measures 1K, but the diagram shows 3.3K.

I've attached the schematic and the parts list. Offending part is R5.

What is the colour code of the resistor in the good Fluke 45?

[nicknails]

I don't see "3.3K" anywhere in the parts list. I see R5 shown as 3.5K
I also see that R5 and RT1 appear to have been hand-altered after the diagram was published.
Perhaps you have the wrong schematic for your make/model/serial number.

Oops. I meant to say 3.5K, not sure why I have 3.3K stuck in my head. Nearest I can tell is that there's only the one schematic.

What is the colour code of the resistor in the good Fluke 45?

The good one is the same on the outside. It has a blue stripe and a green stripe just like the original picture.

[uoficowboy]

I recently got a Kikusui PLZ150W load on Ebay. It's missing one of the plastic nut things on the terminals on the front. Picture attached.

Anybody know where I can get another one? For size, it's compatible with a 4mm banana jack. Not sure about the thread size but I can probably figure it out of needed.

[Yansi]

Get a pair of new ones that will fit. This type of thing is not usually sold in pieces, not these cheapies at all.

[Alexei.Polkhanov]

Find one of these BNC-to-banana adapters and I think that plastic thing that is on it will fit your load. Perhaps you can find one that will fit just by looking at photos on whichever site you buy it from.

[jitter]

They're called "pole terminal". Any electronics store/webshop should have them in different quality grades.

[nadien]

12R cood

[alsetalokin4017]

Get a pair of new ones that will fit. This type of thing is not usually sold in pieces, not these cheapies at all.

This ^.

There are so many different brands, manufacturers, etc. that it is unlikely that you will be able to match the thread from a "random" part to fit your particular banana jack terminal. Unless you know someone who is parting out that same power supply model.... unlikely.

Get a pair of new ones (the entire assembly) that will fit.

[DG41WV]

This fuse like thing was in an Anritsu voltmeter. anyone know what it is ?

[Codemonkey]

Its as the marking on the panel implies, its an elapsed time indicator, not a fuse:

Discussion of something similar here (scroll down)

http://www.forum.radios-tv.co.uk/viewtopic.php?f=20&t=4861

http://www.forum.radios-tv.co.uk/download/file.php?id=9382&sid=edf1198a99128074e6af309fa2528d3d&mode=view

[PA0PBZ]

This fuse like thing was in an Anritsu voltmeter. anyone know what it is ?

Hint: it is labeled exactly as it is right above...

[albert22]

More info on the elapsed timer. Here:

[Godzil]

So I finally took time to take a picture of the weird components in the farnell power supply I get (LS 30-10)

From the component silkscreen, they are Tx like the two transformer, but I found the shape a bit strange, anyone has info on them?

Edit: with picture it's even better





Edit2: By the way, if any one have the documentation/schematics that was given with this power supply, I would be really please if you can share. The only thing I found was that: http://www.ioffer.com/i/farnell-ls30-10-power-supply-schematic-circuit-diagram-522130208 but I don't really want to pay something dubious, and especially because if was given for free with the power supply (I want to check if the low rampup time is due to the capacitors, that are may going to fail, or if it's normal)
(Ho, the big caps there seems to be rubycon one, yummy )

[Richard Crowley]

If they have more than two terminals, then they are almost certainly transformers. And if only two, then they are inductors.
In either case it seems quite unlikely that they have any significant failure mode (at least without a dozen other components also failing).

It looks like a switch-mode power-supply (SMPS).  Slow ramp-up time seems like an early warning of imminent failure.  Unless it was specifically designed that way for whatever purpose in the larger picture.

SMPS are generally quite difficult to repair, even WITH the schematic diagram.  Most of us just replace the entire SMPS with a new one because they are much cheaper to replace than to repair.

[Godzil]

That would be sad, it's a nearly 30year old power supply (in good conditions)

The initial rise time is not that bad, it's more when changing the current limiter or the voltage output that it is a bit slow, it's maybe inherent to this power supply)

[RobertoLG]

hello I need some advice about this diode, I need to find a modern equivalent, It says at the body T 3D 0j, nothing else, I googled it but can't find anything, sorry for the bad pictures they are the best I can take, if somebody can help thanks

[Cubdriver]

What is it from/ what is its purpose?  Rectifier, something else? 

-Pat

[Richard Crowley]

If you can't Google the markings, then you are probably better off replacing it by description/specification.
You should be able to tell from the circuit what the voltage and current ratings should be.

[RobertoLG]

it's a rectifier, from an old stereo Gradiente DS 700, can't find the schematics either

[tautech]

it's a rectifier, from an old stereo Gradiente DS 700, can't find the schematics either

For mains or low voltage?

[RobertoLG]

eh, nevermind SK 308 - 1 amp/ 1000volt one should be enough, thanks anyway

[nali]

Not a component per se -

This was attached to the top of an Intel WG82574 QFN64 package Ethernet chip on a Commell fanless SBC. It seems to be made of a ceramic material and is fixed by double-sided tape. You can see it in-situ here http://www.globalamericaninc.com/commell-le-374.html, it's between the bottom of the mag jack and the main heatsink.

I've never seen this before so I wondered if anybody recognised it? The only guesses I can come up with is either a head shield to protect the chip from heat radiating from the main CPU heatsink (the 82574 itself has a large thermal pad) or maybe some form of EMI absorption? The pad shows no sign of magnetism though.

I'm inclined to think heat shield. We have a couple of hundred of these and I have a 3-4 with Ethernet failure after a couple of year's service - the only mode of failure to date.

Edit: pic attached