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Test Equipment Anonymous (TEA) group therapy thread

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bd139:

--- Quote from: tggzzz on May 28, 2018, 05:47:26 pm ---
--- Quote from: bd139 on May 28, 2018, 04:52:01 pm ---I just bought a roll of 450x AVX 10uF 16V ones for £8 for general use as an example of possible pricing but that’s a little too close to the 15V rail for comfort.

--- End quote ---

Definitely. I've twice had a 15V tant on a 13V rail go short circuit (a strange 13V rail in a 485). That's easy to spot, since the associated 81.6ohm resistor visibly changes value.

--- End quote ---

I assume the 81.6 ohm violently turns to several Gohms? :)

I bought the 16v ones to run in on 3.3 and 5v rails for the sake of overkill


--- Quote from: GerryBags on May 28, 2018, 05:51:29 pm ---
--- Quote from: tggzzz on May 28, 2018, 05:47:26 pm ---
--- Quote from: bd139 on May 28, 2018, 04:52:01 pm ---I just bought a roll of 450x AVX 10uF 16V ones for £8 for general use as an example of possible pricing but that’s a little too close to the 15V rail for comfort.

--- End quote ---

Definitely. I've twice had a 15V tant on a 13V rail go short circuit (a strange 13V rail in a 485). That's easy to spot, since the associated 81.6ohm resistor visibly changes value.

--- End quote ---

Do you think 5V headroom enough? I just ordered some 20V AVX tants for the 15V rail on my 2465B's A5.

--- End quote ---

I’d be happy with that.

Got to say that the new AVX SMD line tants are quite robust. You can’t blow them up. At best they get hot and fall off the board. TH ones don’t fall off so I’m not sure what the outcome is there.

bd139:
Penis fingers strikes again. Thou shall remember MCP1700 is an LDO and thus the input voltage is max 6v. Also thou shall make sure the output switch is off on your power supply before you power it up in case the last voltage you had set it to was 32V.  Cue SOT23 bouncing off the ceiling.  :palm:

Specmaster:
So that textured finish on your ceiling is less of a design feature and more of accidental one caused by the various electronic components over the years that you've tried to propel skywards. Shouldn't think SWMBO or your power supply are feeling particularly happy  about that :palm:

tggzzz:

--- Quote from: GerryBags on May 28, 2018, 05:51:29 pm ---
--- Quote from: tggzzz on May 28, 2018, 05:47:26 pm ---
--- Quote from: bd139 on May 28, 2018, 04:52:01 pm ---I just bought a roll of 450x AVX 10uF 16V ones for £8 for general use as an example of possible pricing but that’s a little too close to the 15V rail for comfort.

--- End quote ---

Definitely. I've twice had a 15V tant on a 13V rail go short circuit (a strange 13V rail in a 485). That's easy to spot, since the associated 81.6ohm resistor visibly changes value.

--- End quote ---

Do you think 5V headroom enough? I just ordered some 20V AVX tants for the 15V rail on my 2465B's A5.

--- End quote ---

Don't know. What does the parts list specify?

One attitude is that if they blow, they blow - and can be replaced, unlike the contents of the NVRAM :)

bd139:
If it's old Tek, probably 16V :)

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