Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 14818762 times)

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Offline tautech

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102700 on: September 21, 2021, 11:13:52 pm »
Hey Med, I think I have one of them little probes for your baby Tek lying around and it’s yours for postage if you like.
Will dig it out tomorrow and post a pic.

You’ll have to wait until we get outta lockdown though for our Postshop’s to open again.  :horse:

Finishing a Vodka and dry then it’s off to ded.  :=\

Thanks.  :-+
Pic attached.
Always wondered what these fitted and not until I saw that vid you posted did I know.  :palm:
I don't recall where it came from or if it had the special Tek plug on its lead although I do remember it having a BNC plug that I fitted many years back being a tight arse and not wanting to shell out for another probe.
Now I don't give a shit and just buy what I need.  :)
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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102701 on: September 22, 2021, 12:01:35 am »
Hey Med, I think I have one of them little probes for your baby Tek lying around and it’s yours for postage if you like.
Will dig it out tomorrow and post a pic.

You’ll have to wait until we get outta lockdown though for our Postshop’s to open again.  :horse:

Finishing a Vodka and dry then it’s off to ded.  :=\

Thanks.  :-+
Pic attached.
Always wondered what these fitted and not until I saw that vid you posted did I know.  :palm:
I don't recall where it came from or if it had the special Tek plug on its lead although I do remember it having a BNC plug that I fitted many years back being a tight arse and not wanting to shell out for another probe.
Now I don't give a shit and just buy what I need.  :)

Yep, that's it. OK, when your lock down lifts lemme know how much and I'll send you the cash.  :-+
An old gray beard with an attitude.
 

Offline tautech

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102702 on: September 22, 2021, 12:32:09 am »
Hey Med, I think I have one of them little probes for your baby Tek lying around and it’s yours for postage if you like.
Will dig it out tomorrow and post a pic.

You’ll have to wait until we get outta lockdown though for our Postshop’s to open again.  :horse:

Finishing a Vodka and dry then it’s off to ded.  :=\

Thanks.  :-+
Pic attached.
Always wondered what these fitted and not until I saw that vid you posted did I know.  :palm:
I don't recall where it came from or if it had the special Tek plug on its lead although I do remember it having a BNC plug that I fitted many years back being a tight arse and not wanting to shell out for another probe.
Now I don't give a shit and just buy what I need.  :)

Yep, that's it. OK, when your lock down lifts lemme know how much and I'll send you the cash.  :-+
Sweet, you’re welcome to it.  :)
BTW it’s now much cleaner since spotting your reply.
Oh and I'll see if I can find a probe condom that fits it.

Will do some homework on costs and flick you mail.
« Last Edit: September 22, 2021, 12:38:58 am by tautech »
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Online Kosmic

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102703 on: September 22, 2021, 12:35:00 am »
Oh hell... someone hide all my bank cards and hit me in the head before I do something foolish...

https://www.ebay.co.uk/itm/373727179675





"NVM Fail" = non volatile memory fail. the calibration is probably lost  :(
« Last Edit: September 22, 2021, 12:46:32 am by Kosmic »
 

Offline vk6zgo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102704 on: September 22, 2021, 12:38:12 am »
For those laughing at my Peugeot 107, it has a timing chain & a completely new motor is ~500€ (bare motor but still...)
Pffft. Timing chain is no better intrinsically than a belt. Just ask any Saturn 4Cyl or Ecotec owner. Main problem with timing belt is time... it has to be replaced at certain intervals, where chains usually don't degrade.

Well, that and the fact they now design engines and the vehicle around them such that there are so many flag-hours in changing belt or chain that what should be periodic maintenance feels like being anally raped with a hot poker.

mnem


The first car I ever really delved into was an early 1950s Singer SM1500-----this was amazingly "high tech" for the period, with its overhead camshaft.

It used a timing chain which lasted for ever, combined with a really stupid, ineffective tensioning device.
When that failed as it almost inevitably did, the only obvious effect was to make the Singer sound like an ancient diesel bus!

The OHC didn't seem to offer any significant performance improvement over similar sized pushrod OHV or even side valve engines of the era.

The next time I had anything to do with OHC was with a mid '80s Toyota Corona, where the timing belt broke, & the car coasted to a graceful halt.
My daughter & I picked up a new belt, chucked it in on our driveway, & were on our way!

Then there was the 1988 Aussie Ford Falcon.
The timing belt was "built like a brick dunny", along with the rest of the engine.
The valves were huge, compared to the ones on my previous Holdens, or the Leyland P76.

Shame the peripherals weren't as good!
 
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Offline tautech

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102705 on: September 22, 2021, 12:41:33 am »
Hope woolfy is OK after the Melbourne magnitude 6 shake.  :-//
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Offline tautech

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102706 on: September 22, 2021, 12:45:06 am »
For those laughing at my Peugeot 107, it has a timing chain & a completely new motor is ~500€ (bare motor but still...)
Pffft. Timing chain is no better intrinsically than a belt. Just ask any Saturn 4Cyl or Ecotec owner. Main problem with timing belt is time... it has to be replaced at certain intervals, where chains usually don't degrade.

Well, that and the fact they now design engines and the vehicle around them such that there are so many flag-hours in changing belt or chain that what should be periodic maintenance feels like being anally raped with a hot poker.

mnem


The first car I ever really delved into was an early 1950s Singer SM1500-----this was amazingly "high tech" for the period, with its overhead camshaft.

It used a timing chain which lasted for ever, combined with a really stupid, ineffective tensioning device.
When that failed as it almost inevitably did, the only obvious effect was to make the Singer sound like an ancient diesel bus!

The OHC didn't seem to offer any significant performance improvement over similar sized pushrod OHV or even side valve engines of the era.

The next time I had anything to do with OHC was with a mid '80s Toyota Corona, where the timing belt broke, & the car coasted to a graceful halt.
My daughter & I picked up a new belt, chucked it in on our driveway, & were on our way!

Then there was the 1988 Aussie Ford Falcon.
The timing belt was "built like a brick dunny", along with the rest of the engine.
The valves were huge, compared to the ones on my previous Holdens, or the Leyland P76.

Shame the peripherals weren't as good!
A school buddy had a Gazelle with twin carbs and that went mighty fine back in the 70's. Got one hell of a caning but just soaked it all up.  >:D
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Offline tautech

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102707 on: September 22, 2021, 12:49:02 am »
 :rant: mode = ON
Have spammers nothing better to do than  :horse: my inbox ?  :bullshit:
7 in 24 hrs FFS !
 :rant: = OFF  ::)
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Online Kosmic

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102708 on: September 22, 2021, 12:53:18 am »
Oh hell... someone hide all my bank cards and hit me in the head before I do something foolish...

Current price is about the same as the cost of the Fischer connector (with a minumum order of £250, IIRC).

You just need to install some proper binding post. Not those Fischer rubbish :)

https://www.eevblog.com/forum/repair/repair-of-solartron-7081-sn718/msg3058252/#msg3058252

« Last Edit: September 22, 2021, 12:55:11 am by Kosmic »
 
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Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102709 on: September 22, 2021, 01:17:33 am »
Eutectic alloys like 63/37 have a solidus/liquidus temp that is very nearly the same.

A eutectic has a precise temperature at which it melts completely or sets completely - not nearly the same, exactly the same. It's half of the definition of a eutectic, the other half being that the melting point of a eutectic is lower than the melting points of the alloy's constituents.

A eutectic has a phase diagram like this:



At the eutectic alloy composition there is no temperature point where there is liquid of one element and solid of another.
They use the term eutectic specifically for 63/37. Yet you and I both know that the change in state with this kind of solder is not that exact. You should be able to use the melting point of 63/37 to set the temp on your soldering station; the closest you can get is within a few degrees.

Is it the product QC? Is it the interaction between the alloy and the flux? Is it sunspots...? I'm going to guess a combination of the above and the response curve/PID loop of the iron.

Doesn't matter. These are the terms the people who make the stuff use, and right or wrong, we have to deal with it. :-//

mnem
 :-/O

Quote from: dictionary

eutectic | juːˈtɛktɪk | Chemistry

adjective
relating to or denoting a mixture of substances (in fixed proportions) that melts and freezes at a single temperature that is lower than the melting points of the separate constituents or of any other mixture of them: "the eutectic mixture melts at 183°C" | "silver and copper form a eutectic system".

noun
a eutectic mixture.
• short for eutectic point.
ORIGIN
late 19th century: from Greek eutēktos ‘easily melting’, from eu ‘well, easily’ + tēkein ‘melt’.

Thank you. You've confirmed that we all know what the dictionary meaning of the word is; I never argued that, only that this is the term used in particular for a whole class of solders by the people who make them, whether or not they adhere to that definition exactly.

With that established, do you think we could stop beating me over the head for something someone else did, please...?

mnem
Thanks, luvya, buh-bye...  :P

No, you, not somebody else, said.

Eutectic alloys like 63/37 have a solidus/liquidus temp that is very nearly the same.

Really, do you have to start a spat every bloody time someone quietly corrects you on something you clearly don't properly understand?

If one says that a eutectic has different solidus and liquidus temperatures it is a contradiction in terms - a very part of the definition of a eutectic is that they are the same. It's categorically wrong. In very literal terms "You couldn't be more wrong". So, a correction for everybody's benefit and better understanding was in order.   

I made no song and dance about it, I didn't go out of my way to embarrass you. I just added some accurate, correct information that would hopefully leave everybody better informed and not misled by what you said. If you'd just let it slide we wouldn't be sitting here with me having to point all this out. But for some reason you insist on drawing attention and blustering over what would have been a minor mistake made by someone nobody would necessarily expect to fully understand what is, after all, a specialist material science term; a bit of understandable ignorance that would cause no one to think the less of you.
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 
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Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102710 on: September 22, 2021, 01:18:48 am »
:rant: mode = ON
Have spammers nothing better to do than  :horse: my inbox ?  :bullshit:
7 in 24 hrs FFS !
 :rant: = OFF  ::)

Wish I could say the same, one of my other email accounts gets around 160 a day, I just cleaned it out 2 hours ago and already there are 9 spammers in my spam folder  :rant:
Who let Murphy in?

Brymen-Fluke-HP-Thurlby-Thander-Tek-Extech-Black Star-GW-Avo-Kyoritsu-Amprobe-ITT-Robin-TTi
 

Offline vk6zgo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102711 on: September 22, 2021, 01:23:55 am »
Maybe there is a cure for TEA. I mean, looking too long at THAT thing might very well break any affection for test equipment. This thing is so fecking ugly that I did not dare to post a picture of it.
Steel yourself for something really, really horrible and take a look:

https://www.ebay.de/itm/294250484573

Hurrrlk!

Soviet ТЛ-4М (ТL-4М) voltmeter from the Bay of Pay. It shipped from Latvia and I just got it yesterday.

It's bright orange, and it includes the battery cover. There are brass inserts in the plastic for the battery cover to screw into. Looks like one of the precision wire-wound resistors is toast and the glass meter cover is cracked. I tried the DC voltage up to 300V and it's reasonably accurate. It has 1,000V AC and DC modes but I don't have anything that makes 1000V DC (yet!). It's all hand assembled. Some Deoxit faderlube helped the mode-selection wheel to turn much easier. The switch in the lower left marked - ~ is the DC/AC mode selector switch. That's different. I grew up during the cold war, which makes this meter all the more interesting. Does anyone have any idea what year this was mode? I'll have to cut and paste some Cyrillic characters into a translating site to read what is written on the back.

EDIT:

Thanks, Neomys Sapiens. You meant to gross us out but instead triggered a spell of "What an odd little meter. I simply must have it."

EDIT:

"8512" on the diode. Is that a date code? Also, 84 and 85 markings on some of the resistors. Perhaps that's a year?

EDIT:

I just noticed the wire lacing. How many meters have that as a construction feature? Not too damn many, I'd wager.

Some old Brit & Oz meters, & my venerable General Radio 726A, which, in a weak moment, I donated to a "Radio Museum".
It never went on display, & now the museum has been eviscerated.
Hopefully, all the amazing stuff they did display is in storage, but it is much more likely to have been recycled. :(
 
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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102712 on: September 22, 2021, 01:27:51 am »
@mnem congrats for going all in.  And for your tinkering on those cameras.

in other news, my Nakamichi 680 arrived today. Need to unpack, due to recent events I had not gotten around to it yet.

Thanks for the  :-+. I'm at 6 grams right now, but that's due to missed dinner out roadrunning.

I need to get some pics up on that lens assembly; it really is a interesting mechanism.

Good luck on the Nak. Those belts can be a right blister if they've gone marshmallowy.

Just read your post aboot it needing an overhaul and the VFD going south during testing... Uggh.

Hope you get it sorted.
:-+

mnem
 :phew:
« Last Edit: September 22, 2021, 04:42:09 am by mnementh »
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Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102713 on: September 22, 2021, 01:28:47 am »
The first car I ever really delved into was an early 1950s Singer SM1500-----this was amazingly "high tech" for the period, with its overhead camshaft.

Urgh. My father had one of those. First car I ever rode in. I remember it as horrible and was greatly pleased when he got rid of it and got a Hillman Imp which we had for years. When the Hillman Imp finally went to its grave he got a Simca 1100. Bloody horrible car. Everything that was good about the Imp was bad on the Simca, everything that the Simca ought to have done better than the Imp it didn't. Ten years later there was no sign of the marque in the UK and I'm not bloody surprised.
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 

Offline vk6zgo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102714 on: September 22, 2021, 01:39:36 am »
A typical German flatjoke.

A joke for the dour-------Scots would probably appreciate it.

That is just too pointed.  I have been so good holding back ... until now.

It is not really the joke that is flat (I have Scottish blood), but it is my Fahrrad that is flat...  :-DD

I still have not found the cause of the flat tire in the conversation a couple many of pages back ...

actually we'd say the joke is as flat as the countryside.
Especially if we are in the frisia (North, East, does not matter) where you can see on Monday who will be visiting you for tea on Friday.

Now, that last comment sounds like something an Australian would say. ;D

In a similar way, we refer to really windy places as having "lazy" winds-----they don't bother going round you, but go right through you!
I imagine the winds there would be that type!
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102715 on: September 22, 2021, 01:43:16 am »
Eutectic alloys like 63/37 have a solidus/liquidus temp that is very nearly the same.

A eutectic has a precise temperature at which it melts completely or sets completely - not nearly the same, exactly the same. It's half of the definition of a eutectic, the other half being that the melting point of a eutectic is lower than the melting points of the alloy's constituents.

A eutectic has a phase diagram like this:



At the eutectic alloy composition there is no temperature point where there is liquid of one element and solid of another.
They use the term eutectic specifically for 63/37. Yet you and I both know that the change in state with this kind of solder is not that exact. You should be able to use the melting point of 63/37 to set the temp on your soldering station; the closest you can get is within a few degrees.

Is it the product QC? Is it the interaction between the alloy and the flux? Is it sunspots...? I'm going to guess a combination of the above and the response curve/PID loop of the iron.

Doesn't matter. These are the terms the people who make the stuff use, and right or wrong, we have to deal with it. :-//

mnem
 :-/O

Quote from: dictionary

eutectic | juːˈtɛktɪk | Chemistry

adjective
relating to or denoting a mixture of substances (in fixed proportions) that melts and freezes at a single temperature that is lower than the melting points of the separate constituents or of any other mixture of them: "the eutectic mixture melts at 183°C" | "silver and copper form a eutectic system".

noun
a eutectic mixture.
• short for eutectic point.
ORIGIN
late 19th century: from Greek eutēktos ‘easily melting’, from eu ‘well, easily’ + tēkein ‘melt’.

Thank you. You've confirmed that we all know what the dictionary meaning of the word is; I never argued that, only that this is the term used in particular for a whole class of solders by the people who make them, whether or not they adhere to that definition exactly.

With that established, do you think we could stop beating me over the head for something someone else did, please...?

mnem
Thanks, luvya, buh-bye...  :P

No, you, not somebody else, said.

Eutectic alloys like 63/37 have a solidus/liquidus temp that is very nearly the same.

Really, do you have to start a spat every bloody time someone quietly corrects you on something you clearly don't properly understand?

If one says that a eutectic has different solidus and liquidus temperatures it is a contradiction in terms - a very part of the definition of a eutectic is that they are the same. It's categorically wrong. In very literal terms "You couldn't be more wrong". So, a correction for everybody's benefit and better understanding was in order.   

I made no song and dance about it, I didn't go out of my way to embarrass you. I just added some accurate, correct information that would hopefully leave everybody better informed and not misled by what you said. If you'd just let it slide we wouldn't be sitting here with me having to point all this out. But for some reason you insist on drawing attention and blustering over what would have been a minor mistake made by someone nobody would necessarily expect to fully understand what is, after all, a specialist material science term; a bit of understandable ignorance that would cause no one to think the less of you.

Here we go again.

What I said was that the people who make this stuff call it a eutectic alloy and that's why I called it that, but it doesn't behave that way in practice. That is all I've said in every gawddamn round of this back and forth. I refuse to be drawn any further into another of your pedantic "schoolings".

I'm wrong. There, you have it.

Now, can we please have some positive interaction? It seems like the only time you ever bother to talk to me any more it's something in a negative tone, or to correct me.

It really gets old. ::)

mnem
 :-/O
« Last Edit: September 22, 2021, 02:03:02 am by mnementh »
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Offline Neomys Sapiens

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102716 on: September 22, 2021, 02:27:39 am »
Maybe there is a cure for TEA. I mean, looking too long at THAT thing might very well break any affection for test equipment. This thing is so fecking ugly that I did not dare to post a picture of it.
Steel yourself for something really, really horrible and take a look:

https://www.ebay.de/itm/294250484573

Hurrrlk!

Soviet ТЛ-4М (ТL-4М) voltmeter from the Bay of Pay. It shipped from Latvia and I just got it yesterday.

It's bright orange, and it includes the battery cover. There are brass inserts in the plastic for the battery cover to screw into. Looks like one of the precision wire-wound resistors is toast and the glass meter cover is cracked. I tried the DC voltage up to 300V and it's reasonably accurate. It has 1,000V AC and DC modes but I don't have anything that makes 1000V DC (yet!). It's all hand assembled. Some Deoxit faderlube helped the mode-selection wheel to turn much easier. The switch in the lower left marked - ~ is the DC/AC mode selector switch. That's different. I grew up during the cold war, which makes this meter all the more interesting. Does anyone have any idea what year this was mode? I'll have to cut and paste some Cyrillic characters into a translating site to read what is written on the back.

EDIT:

Thanks, Neomys Sapiens. You meant to gross us out but instead triggered a spell of "What an odd little meter. I simply must have it."

EDIT:

"8512" on the diode. Is that a date code? Also, 84 and 85 markings on some of the resistors. Perhaps that's a year?

EDIT:

I just noticed the wire lacing. How many meters have that as a construction feature? Not too damn many, I'd wager.
As some of you like that beast so much, there is another one in grey, which makes it slightly more bearable. Fortunately with the price set to deter, so that I will not be the perpetrator of proliferation of them.  ;D
https://www.ebay.de/itm/334154027761
 

Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102717 on: September 22, 2021, 02:42:22 am »
Now, can we please have some positive interaction? It seems like the only time you ever bother to talk to me any more it's something in a negative tone, or to correct me.

You know that's not true.

Quote
It really gets old. ::)

mnem
 :-/O

I'll tell you what gets old, not being able to quietly correct a factual error in something you've written before first thinking "Is this worth it? Is the information important enough that it's worth risking sort of reply that Mnem might think somehow insults his understanding and cause him to take three pages to explain how he isn't wrong and I'm picking on him?". I didn't blink before correcting Vince about the silver solder thing earlier because I didn't expect any comeback for having the temerity to offer an alternative, and as far as I know, correct interpretation to him. I think hard every time I ought to reply to you and say "Erm no, it's like this", or "Not quite" or "I think you're misunderstanding this". I certainly genuinely wouldn't dare just say "That's wrong" to you for anything less than something categorically wrong and easily proven because I know that even that you'll quibble over. Think about that for a minute. No, really, think about that. I don't have to do mental weighing like that before risking disagreeing with anyone else on the whole forum, even people who are famously fractious, even the people everybody regards as gobshites.
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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102718 on: September 22, 2021, 02:49:35 am »
 ::)
An old gray beard with an attitude.
 
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Offline Neomys Sapiens

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102719 on: September 22, 2021, 02:54:48 am »
Oh no....... ohhhhh...... noooooooooo.... I did it AGAIN !  :scared:

Remember just a few days ago I talked about this horrible Gould 1604 scope that drove me nuts when I fixed it a year ago ? How I said it was a horrible experience that brought many grey hair, and how I promised myself I would never, ever buy a Gould scope again ?.....


Some time ago, I had a Gould scope in my stash:

https://www.eevblog.com/forum/testgear/show-your-strangest-crappiest-piece-of-te/msg1807304/#msg1807304

I don't have it anymore, but there might exist one more where it came from, might have been scrapped in the meantime, don't know. In case you're interested, I'll have a look tomorrow if it's still there and silently take it away for you (no one will ever miss it).
Since this Gould scope topic appeared here, I'm suffering from bouts of guilt. As a young practicioner with a less developed taste in instruments, I made a company, which had contracted me as support for an industrial project, buy such a thing. I left soon after and they were stuck with it . :-[
 

Offline wolfy007

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102720 on: September 22, 2021, 03:12:01 am »
Oh hell... someone hide all my bank cards and hit me in the head before I do something foolish...

https://www.ebay.co.uk/itm/373727179675






"NVM Fail" = non volatile memory fail. the calibration is probably lost  :(

Id buy it if he shipped to Oz....    bloody addictions....  :palm:
 

Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102721 on: September 22, 2021, 03:15:03 am »
Oh hell... someone hide all my bank cards and hit me in the head before I do something foolish...

https://www.ebay.co.uk/itm/373727179675






"NVM Fail" = non volatile memory fail. the calibration is probably lost  :(

Id buy it if he shipped to Oz....    bloody addictions....  :palm:

I take it we can assume from the fact that you're posting that you survived your little "knee trembler" earlier.
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 
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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102722 on: September 22, 2021, 04:09:46 am »
Now, can we please have some positive interaction? It seems like the only time you ever bother to talk to me any more it's something in a negative tone, or to correct me.

You know that's not true.

Quote
It really gets old. ::)

mnem
 :-/O

I'll tell you what gets old, not being able to quietly correct a factual error in something you've written before first thinking "Is this worth it? Is the information important enough that it's worth risking sort of reply that Mnem might think somehow insults his understanding and cause him to take three pages to explain how he isn't wrong and I'm picking on him?". I didn't blink before correcting Vince about the silver solder thing earlier because I didn't expect any comeback for having the temerity to offer an alternative, and as far as I know, correct interpretation to him. I think hard every time I ought to reply to you and say "Erm no, it's like this", or "Not quite" or "I think you're misunderstanding this". I certainly genuinely wouldn't dare just say "That's wrong" to you for anything less than something categorically wrong and easily proven because I know that even that you'll quibble over. Think about that for a minute. No, really, think about that. I don't have to do mental weighing like that before risking disagreeing with anyone else on the whole forum, even people who are famously fractious, even the people everybody regards as gobshites.

Okay... so we're going to do this. Fine. ::)

You do this every time, C. You quote folk out of context (I'm not the only one), as if the one point you are drilling in on is the only one, and you hammer them over and over with that one point until they get sick of it.

All this time, you conveniently ignore the posts where I try with painstaking care to clarify what I meant, and continue to drill on the one point, as if it were only fucking thing that matters.

Here:

Eutectic alloys like 63/37 have a solidus/liquidus temp that is very nearly the same.

A eutectic has a precise temperature at which it melts completely or sets completely - not nearly the same, exactly the same. It's half of the definition of a eutectic, the other half being that the melting point of a eutectic is lower than the melting points of the alloy's constituents.

A eutectic has a phase diagram like this:



At the eutectic alloy composition there is no temperature point where there is liquid of one element and solid of another.
They use the term eutectic specifically for 63/37. Yet you and I both know that the change in state with this kind of solder is not that exact. You should be able to use the melting point of 63/37 to set the temp on your soldering station; the closest you can get is within a few degrees.

Is it the product QC? Is it the interaction between the alloy and the flux? Is it sunspots...? I'm going to guess a combination of the above and the response curve/PID loop of the iron.

Doesn't matter. These are the terms the people who make the stuff use, and right or wrong, we have to deal with it. :-//

mnem
 :-/O

Quote from: dictionary

eutectic | juːˈtɛktɪk | Chemistry

adjective
relating to or denoting a mixture of substances (in fixed proportions) that melts and freezes at a single temperature that is lower than the melting points of the separate constituents or of any other mixture of them: "the eutectic mixture melts at 183°C" | "silver and copper form a eutectic system".

noun
a eutectic mixture.
• short for eutectic point.
ORIGIN
late 19th century: from Greek eutēktos ‘easily melting’, from eu ‘well, easily’ + tēkein ‘melt’.

Now, the normal response to that would be to actually converse aboot the point raised therein. Do you do that...? No. You just keep hammering on the only thing you care aboot, that I said something that was factually incorrect.

So let me say this again... the people who make the solder referred to 63/37 as a eutectic alloy. They actually referred to a list of several of them in the course I took so long ago... but the only ones I've used were 63/37 and another made for low-temp soldering to stainless steel.

I used that term because they did, no other reason. I then went on to describe the actual behavior of 63/37 solder thusly:

Quote from: mnementh
Eutectic alloys like 63/37 have a solidus/liquidus temp that is very nearly the same. This can be a bit of a pain if you're trying to solder large masses, as achieving proper wetting can be difficult where the mass of the work is sucking the heat away very fast and it develops lumps where the solder solidifies while still wetting/flowing.

At no time did I ever  disagree with you or the definition of the word eutectic. In fact, I agreed with you that is how it SHOULD behave, as you can see in the post I quoted above.

Now... as to how to correct this horrifically wrong statement... let me see...


Supposedly eutectic solder alloys like 63/37 have a solidus/liquidus temp that is very nearly the same. This can be a bit of a pain if you're trying to solder large masses, as achieving proper wetting can be difficult where the mass of the work is sucking the heat away very fast and it develops lumps where the solder solidifies while still wetting/flowing.



So-called eutectic alloys like 63/37 have a solidus/liquidus temp that is very nearly the same. This can be a bit of a pain if you're trying to solder large masses, as achieving proper wetting can be difficult where the mass of the work is sucking the heat away very fast and it develops lumps where the solder solidifies while still wetting/flowing.



Alloys like 63/37 have a solidus/liquidus temp that is very nearly the same. They call them eutectic, but in practice the solder still melts at a very narrow range of temperatures. This can be a bit of a pain if you're trying to solder large masses, as achieving proper wetting can be difficult where the mass of the work is sucking the heat away very fast and it develops lumps where the solder solidifies while still wetting/flowing.


Which one do you like best...?

And finally... I stand behind this statement:

Now, can we please have some positive interaction? It seems like the only time you ever bother to talk to me any more it's something in a negative tone, or to correct me.

You push my buttons, C. You push them in the same way my grand-dad did. That's why I have short temper with you; but that does not mean my gripes aren't legitimate.

It's not just the times when you come down on me; it's the fact you almost never have anything actually positive to say to me. The best you can manage is what would be called "good-natured ribbing"... and if there were a balance, then it would actually be taken as such. But there isn't. That is pretty much the top of the scale.

Statistically speaking, there has to be some time when I have better than that coming. Fuck, even crusty ol' med manages to find something from time to time, and he's a confirmed antisocialist.

mnem
*just tired*


alt-codes work here:  alt-0128 = €  alt-156 = £  alt-0216 = Ø  alt-225 = ß  alt-230 = µ  alt-234 = Ω  alt-236 = ∞  alt-248 = °
 

Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102723 on: September 22, 2021, 04:16:21 am »
How did I get to deserve a mention in your little tirade?  :-//

Do me and all of us a favor. Log off, step away from the keyboard, and go to bed.  ::)
An old gray beard with an attitude.
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #102724 on: September 22, 2021, 04:24:06 am »
alt-codes work here:  alt-0128 = €  alt-156 = £  alt-0216 = Ø  alt-225 = ß  alt-230 = µ  alt-234 = Ω  alt-236 = ∞  alt-248 = °
 
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