Test Equipment Anonymous (TEA) group therapy thread

[ch_scr]

No decent fans for sale in the shops then?

I'd rather have one for free, from scrap. This one was good enough without the metal foil extension in the past. I'm rather surprised how well the upgrade works. Fan was once part of a microwave...

[mnementh]

Guess Tautech can continue polishing that bullet. Diverticulitis.
If this worsens I'll need to go to the emergency room.
Bloody Hell.
This is not the way I want to lose weight

[ a quick google later ]

I fully agree. Not the way to diminish.

Exact same here. Time for a high-fiber diet. With a side of fiber.

mnem
And now I have another physical plant failure mode to worry aboot... 

[Saskia]

Ok, ER. Diagnosis confirmed. Waiting for CT to grade it and decide on treatment. Doc wants to cut out 1m of intestines, I am hesitant.

[mansaxel]

I fully agree. Not the way to diminish.

Exact same here. Time for a high-fiber diet. With a side of fiber.

Dosenbrot or Schwarzbrot will do that. Saskia is lucky to live in a civilised country with coarse bread products. Finland would be even better; they're the ruling world champions in sourdough rye bread. USA and UK don't even qualify; they're the equivalent of reserves to the junior soccer team at a baseball college...

[BU508A]

  

Get well soon, Saskia. Keep my fingers crossed.

[mansaxel]

Ok, ER. Diagnosis confirmed. Waiting for CT to grade it and decide on treatment. Doc wants to cut out 1m of intestines, I am hesitant.

If you offer to do the excision with 50 grams of... they might reconsider?

[Saskia]

I might consider the old Seppuku method, but it is so final.
Currently I am on nada diet.
Meaning water and green tea. No calories ...on a side note I now have lost 12.5 kg since early May

[mnementh]

My mother used to say "It's not that getting older is such a blast; it's that the alternative is just absurd." She was long passed before I truly understood all of her meaning... *sigh*

Best wishes, Saskia. 

mnem
 

[med6753]

This is absolutely bizarre. I connected up the supply and it would climb to about 3VDC, refuse to go any higher, and the current would jump up to over 1.5A and the supply would go into constant current mode. My thought was the supply was defective. So I connected the little hp 6215A (30V max, 500ma). Same thing. The supply would climb to about 2VDC then the current would peg at 500ma. Checked my connections. Are correct. Did a resistance test with the 87. 1932 ohms!  That's no short. But apparently whatever it is DOES short out at a minimum amount of voltage applied. Went over the scope checking for hot spots or smoke. Found none.

I kept trying to raise the voltage and suddenly was able to get up to about 30VDC before it would short out again. Then while raising the voltage heard a little snap and now I can achieve 100V. Current 350ma which seems a little high. I'm going to let it sit as shown for maybe an hour or so and see what happens. Tomorrow I'll probably attempt to power up the entire supply with this external 100V.

This is fucking weird. 

 

[mnementh]

Yeah... almost positive the short is on the other side of one or more semis which is/are not turning on until the power rises enough. That snap was probably one such device or a resistor dying in that high-current path. Or, possibly a diode or tant cracking open like a walnut.

mnem
 

[med6753]

Yeah... almost positive the short is on the other side of one or more semis which is/are not turning on until the power rises enough. That snap was probably one such device or a resistor dying in that high-current path. Or, possibly a diode or tant cracking open like a walnut.

mnem
 

Yea, agree with all that. But that I can deal with. I just want to get this POS a stable power up and show at least SOME progress. 

Edit....still stable at 100V, 350ma. 

[tautech]

Yeah... almost positive the short is on the other side of one or more semis which is/are not turning on until the power rises enough. That snap was probably one such device or a resistor dying in that high-current path. Or, possibly a diode or tant cracking open like a walnut.

mnem
 

Yea, agree with all that. But that I can deal with. I just want to get this POS a stable power up and show at least SOME progress. 

Edit....still stable at 100V, 350ma. 

That's just 35W of however much this old beast draws. Sounds believable.

[xrunner]

Ha - everything has a USB power port now even that 100V supply. 

[mnementh]

Yeah... almost positive the short is on the other side of one or more semis which is/are not turning on until the power rises enough. That snap was probably one such device or a resistor dying in that high-current path. Or, possibly a diode or tant cracking open like a walnut.

mnem
 

Yea, agree with all that. But that I can deal with. I just want to get this POS a stable power up and show at least SOME progress. 

Edit....still stable at 100V, 350ma. 

Just be glad it's too old to have RIFAs. 

mnem
   Okay... who tooted...?

[mnementh]

Ha - everything has a USB power port now even that 100V supply. 

Yeah, I noticed that. Imagining the fireworks if there were some catastrophic internal short... and you know it's just the sort of thing gonna happen when the GF has her brand-new iPwn plugged into it to charge... 

mnem

[wolfy007]

Yeah... almost positive the short is on the other side of one or more semis which is/are not turning on until the power rises enough. That snap was probably one such device or a resistor dying in that high-current path. Or, possibly a diode or tant cracking open like a walnut.

mnem
 

Yea, agree with all that. But that I can deal with. I just want to get this POS a stable power up and show at least SOME progress. 

Edit....still stable at 100V, 350ma. 

Is it possibly some loose structure in the CRT itself maybe causing a short of sorts???

[Brumby]

Yeah... almost positive the short is on the other side of one or more semis which is/are not turning on until the power rises enough. That snap was probably one such device or a resistor dying in that high-current path. Or, possibly a diode or tant cracking open like a walnut.

mnem
 

Yea, agree with all that. But that I can deal with. I just want to get this POS a stable power up and show at least SOME progress. 

Edit....still stable at 100V, 350ma. 

Is it possibly some loose structure in the CRT itself maybe causing a short of sorts???

Do you have a screw loose?

[Robert763]

This is absolutely bizarre. I connected up the supply and it would climb to about 3VDC, refuse to go any higher, and the current would jump up to over 1.5A and the supply would go into constant current mode. My thought was the supply was defective. So I connected the little hp 6215A (30V max, 500ma). Same thing. The supply would climb to about 2VDC then the current would peg at 500ma. Checked my connections. Are correct. Did a resistance test with the 87. 1932 ohms!  That's no short. But apparently whatever it is DOES short out at a minimum amount of voltage applied. Went over the scope checking for hot spots or smoke. Found none.

I kept trying to raise the voltage and suddenly was able to get up to about 30VDC before it would short out again. Then while raising the voltage heard a little snap and now I can achieve 100V. Current 350ma which seems a little high. I'm going to let it sit as shown for maybe an hour or so and see what happens. Tomorrow I'll probably attempt to power up the entire supply with this external 100V.

This is fucking weird. 

I refer you to my earlier comment.
I now suggest that the transistor that was being turned on is now open circuit but the root cause component failure that turned it on hard is still passing excessive current.
With hindsight a lower voltage an "look" with  thermal imager, IR thrmometer or even just a finger on transistors would have been preferred.

[tggzzz]

Yeah... almost positive the short is on the other side of one or more semis which is/are not turning on until the power rises enough. That snap was probably one such device or a resistor dying in that high-current path. Or, possibly a diode or tant cracking open like a walnut.

mnem
 

Yea, agree with all that. But that I can deal with. I just want to get this POS a stable power up and show at least SOME progress. 

Edit....still stable at 100V, 350ma. 

Is it possibly some loose structure in the CRT itself maybe causing a short of sorts???

Do you have a screw loose?

All regulars here do, by definition. I'm sure you realise that, but non-native English speakers might not.

[capt bullshot]

Ok, ER. Diagnosis confirmed. Waiting for CT to grade it and decide on treatment. Doc wants to cut out 1m of intestines, I am hesitant.

Ouch. I'd hesitate too, and ask another doctor.

[Brumby]

Do you have a screw loose?

All regulars here do, by definition. I'm sure you realise that, but non-native English speakers might not.

 

[Specmaster]

Ok, ER. Diagnosis confirmed. Waiting for CT to grade it and decide on treatment. Doc wants to cut out 1m of intestines, I am hesitant.

Ouch. I'd hesitate too, and ask another doctor.

Ouch, that seems to me to be a drastic measure that may be a step too far, once removed, it can't be replaced. I agree, I'd get a second opinion on that before accepting the diagonoses.

[Specmaster]

This is absolutely bizarre. I connected up the supply and it would climb to about 3VDC, refuse to go any higher, and the current would jump up to over 1.5A and the supply would go into constant current mode. My thought was the supply was defective. So I connected the little hp 6215A (30V max, 500ma). Same thing. The supply would climb to about 2VDC then the current would peg at 500ma. Checked my connections. Are correct. Did a resistance test with the 87. 1932 ohms!  That's no short. But apparently whatever it is DOES short out at a minimum amount of voltage applied. Went over the scope checking for hot spots or smoke. Found none.

I kept trying to raise the voltage and suddenly was able to get up to about 30VDC before it would short out again. Then while raising the voltage heard a little snap and now I can achieve 100V. Current 350ma which seems a little high. I'm going to let it sit as shown for maybe an hour or so and see what happens. Tomorrow I'll probably attempt to power up the entire supply with this external 100V.

This is fucking weird. 

I refer you to my earlier comment.
I now suggest that the transistor that was being turned is now open circuit  but the root cause component failure is tht turned it on hard is still passing excessive current.
With hindsight a lower voltage an "look" with  thermal imager, IR thrmometer or even just a finger on transistors would have been preferred.

I agree with Robert here, even a cheap $10 to $20 Infra Red Thermometer will when the red laser dot is directed onto the parts will be sufficient to detect something that is warming up to a temperature that is above the background temp. Keep the voltage low and the damage will not get out of hand. If the fault does not show itself when the power supply is connected, I'd personally be very tempted to wiggle about the wiring looms in case there is a fault in those, maybe a sharp piece of metal digging into them at some obscure location that might be aggravated by gravity or temperature?

[Saskia]

Actually cutting out the sigma colon is the only way to get rid of this condition. However l just barely survived the last big surgery I had. I do not want to chance it, the bet is too high.

[tggzzz]

Actually cutting out the sigma colon is the only way to get rid of this condition. However l just barely survived the last big surgery I had. I do not want to chance it, the bet is too high.

My mother had diverticulitis for decades, without surgery and without major lifestyle changes. Obviously I can't compare that with your condition, and am not sure what actions she took, but it may indicate there can be a cause for optimism.

My very limited understanding is that it is caused by food particles getting caught in depressions in the gut. If so, then fibrogel (i.e. fibre) might be a way to scour the particles out of the depressions.

That information is worth what you paid for it, of course. I'd certainly want an opinion from someone specialising in the condition, not an ER generalist.