Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 1522790 times)

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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10700 on: May 16, 2018, 03:41:40 am »
Some insight into how it's done:



 

Offline GerryBags

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10701 on: May 16, 2018, 04:55:59 am »
VintageTek on YouTube is great. The second clip, above, is gold for anyone tackling the early Tek scopes, and it shows why the silver solder was needed on those ceramic turret strips, along with the right way to solder to them.

It's a shame that there is nothing similar to distinguish the modern Tek gear from its competition. A tube of Tek branded lead-free SMD solder paste gaffer-taped to the inside of the case wouldn't really cut it.  :D
 

Online bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10702 on: May 16, 2018, 07:38:22 am »



They're congregating...or perhaps colluding. Did you recently schlepp some of the units I see there?

Indeed I did.  You obviously recognize the pile just to the left of center as my recent score.


That I do. Thought I might've been seeing things, heh heh.

It's funny when packing the instrument to ship it winds up being more challenging than bringing it back to life was...

Haha, yep. Hmmm, if only we could set up a compound, like back in the '60's, where TEA members could live. Imagine the hackerspace we'd end up with. :o
I TEA.
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10703 on: May 16, 2018, 08:45:28 am »
Heads everyone, TTi TGP110's are back in stock again and they have 18 in cream and 19 in grey.

I'm not really sure why I would want a pulse generator; any of the pulses I would want would be more conveniently generated by a pattern generator.

Having said that, I recently picked a Tek 115 up for £5, and that does one thing a pattern generator won't: have (independently) variable rise and fall times. Mind you, neither does that TTI.

The Tek 115 is remarkably versatile, being able to generate double pulse and, with an external signal triggered bursts. The TTI doesn't look like it does that either.

Example, with equal rise/fall times:


Ob porn: the front panel showing rise and fall time controls, and one interior shot showing old-school wiring looks and, if you look closely on the left, 863pF, 908pF and 9.85nF capacitors.
Oh, that is quite delicious... has much of the same "precision analog built for the space program" feel as my old 454... also would be a good module (if collected together with a dozen of its brothers) for analog computing or synthesizer stacks.

Actually, it is a module. If you look at the lower left front panel you will see the single screw securing it in its slide-in housing. Took me a while to figure out that I didn't need to remove panels to get at the innards, doh.

Much more detailed porn here: https://www.flickr.com/photos/anachrocomputer/albums/72157690644170820

Keep an eye out for the two hidden tunnel diodes and the roll of solder. And the gold, of course.

Nice photography.  :-+ That thing is the same age as me.   :o

I knew about needing silver-bearing solder for working with their ceramic terminal strips; it's a testament to their foresight, and the fact they felt it was important enough to do the job right to include some of "the right stuff" as a consumable along with this product. Back then, they designed their stuff to last indefinitely as long as one was prepared to maintain it; there was a time when automobiles, telephones, and even desklamps were also designed and manufactured with this mindset.

Funny how in this world of disposable utensils, plates, tools and even people, no matter how amazing the tech in our everyday lives becomes, we still harken back to those same generations when we need to evoke a feeling of quality.

It isn't just nostalgia; we took pride in a job well-done and a thing well-made, and we lived in our communities rather than each of us building ourselves a little island in the middle of a moat.


mnem
Just imagine modern-day Americans pulling together against a common enemy the way we did in WWII; our society simply isn't capable of that kind of unity.
« Last Edit: May 16, 2018, 08:47:20 am by mnementh »
 

Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10704 on: May 16, 2018, 10:40:41 am »
Heads everyone, TTi TGP110's are back in stock again and they have 18 in cream and 19 in grey.

I'm not really sure why I would want a pulse generator; any of the pulses I would want would be more conveniently generated by a pattern generator.

Having said that, I recently picked a Tek 115 up for £5, and that does one thing a pattern generator won't: have (independently) variable rise and fall times. Mind you, neither does that TTI.

The Tek 115 is remarkably versatile, being able to generate double pulse and, with an external signal triggered bursts. The TTI doesn't look like it does that either.

Example, with equal rise/fall times:


Ob porn: the front panel showing rise and fall time controls, and one interior shot showing old-school wiring looks and, if you look closely on the left, 863pF, 908pF and 9.85nF capacitors.
Oh, that is quite delicious... has much of the same "precision analog built for the space program" feel as my old 454... also would be a good module (if collected together with a dozen of its brothers) for analog computing or synthesizer stacks.

Actually, it is a module. If you look at the lower left front panel you will see the single screw securing it in its slide-in housing. Took me a while to figure out that I didn't need to remove panels to get at the innards, doh.

Much more detailed porn here: https://www.flickr.com/photos/anachrocomputer/albums/72157690644170820

Keep an eye out for the two hidden tunnel diodes and the roll of solder. And the gold, of course.

Nice photography.  :-+ That thing is the same age as me.   :o

I knew about needing silver-bearing solder for working with their ceramic terminal strips; it's a testament to their foresight, and the fact they felt it was important enough to do the job right to include some of "the right stuff" as a consumable along with this product. Back then, they designed their stuff to last indefinitely as long as one was prepared to maintain it; there was a time when automobiles, telephones, and even desklamps were also designed and manufactured with this mindset.

Funny how in this world of disposable utensils, plates, tools and even people, no matter how amazing the tech in our everyday lives becomes, we still harken back to those same generations when we need to evoke a feeling of quality.

It isn't just nostalgia; we took pride in a job well-done and a thing well-made, and we lived in our communities rather than each of us building ourselves a little island in the middle of a moat.

But there was also an awful lot of sheer crap back then, which really is best forgotten. Ted Sturgeon was spot on when he proclaimed "90% of everything is crap".

I'm sure 10% of what we do today isn't crap.
There are lies, damned lies, statistics - and ADC/DAC specs.
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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10705 on: May 16, 2018, 11:38:58 am »
Some insight into how it's done:







"...Because of the high component density offered by the use of these boards, it is possible to build more sophisticated instruments with greater versatility and reliability."

What are there, maybe a dozen actives on it?

*Thinking to a modern SnapDragon CPU with billions of transistors in the board space one of those transistors occupies, operating at thousands of times the speed*

That's the development of one person's lifetime, boys and girls. Actually, I'm surprised we haven't crossed the Singularity threshold already.


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« Last Edit: May 16, 2018, 11:42:35 am by mnementh »
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10706 on: May 16, 2018, 11:49:40 am »
Nice photography.  :-+ That thing is the same age as me.   :o

I knew about needing silver-bearing solder for working with their ceramic terminal strips; it's a testament to their foresight, and the fact they felt it was important enough to do the job right to include some of "the right stuff" as a consumable along with this product. Back then, they designed their stuff to last indefinitely as long as one was prepared to maintain it; there was a time when automobiles, telephones, and even desklamps were also designed and manufactured with this mindset.

Funny how in this world of disposable utensils, plates, tools and even people, no matter how amazing the tech in our everyday lives becomes, we still harken back to those same generations when we need to evoke a feeling of quality.

It isn't just nostalgia; we took pride in a job well-done and a thing well-made, and we lived in our communities rather than each of us building ourselves a little island in the middle of a moat.

But there was also an awful lot of sheer crap back then, which really is best forgotten. Ted Sturgeon was spot on when he proclaimed "90% of everything is crap".

I'm sure 10% of what we do today isn't crap.

I disagree; I think we'd be lucky if 10% of 10% of what we produce nowadays isn't crap. DAMNED lucky. It is pretty much incontrovertible fact that crap is America's biggest export; with a close second being "Collateral Damage".


mnem
"It's all crap. Pick a level and dive in." ~ My Grand-dad
 

Online bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10707 on: May 16, 2018, 12:00:45 pm »
...I recently picked a Tek 115 up for £5, and that does one thing a pattern generator won't: have (independently) variable rise and fall times. Mind you, neither does that TTI.

...

Ob porn: the front panel showing rise and fall time controls, and one interior shot showing old-school wiring looks and, if you look closely on the left, 863pF, 908pF and 9.85nF capacitors.

Thanks for the peek inside. Very cool. Added to the POI index.

Speaking of the index, it's getting a bit long for comfortable browsing, so I made a few categories and re-organized the list.
I TEA.
 

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10708 on: May 16, 2018, 12:08:42 pm »
Funny how in this world of disposable utensils, plates, tools and even people, no matter how amazing the tech in our everyday lives becomes, we still harken back to those same generations when we need to evoke a feeling of quality.

It isn't just nostalgia; we took pride in a job well-done and a thing well-made, and we lived in our communities rather than each of us building ourselves a little island in the middle of a moat.

Yep, even some mundane things, like cling wrap (a.k.a., Saran Wrap) used to be better. Alas, there are tradeoffs when trying to minimize pollution.

I TEA.
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10709 on: May 16, 2018, 12:29:39 pm »
Yeah, except that wasn't the reason; that's just the reason their PR weenies schlepp to make them look like good guys. They produce more Saran plastic than ever; it is commonly used in high-pressure industrial and food-production applications of all sorts. They couldn't care less about pollution, just like every other corporate entity on the planet.

They stopped selling it to consumers because PVC film costs a fraction as much to produce, and that's really the only reason; they found the hard way that folks won't pay more than a buck or three for a roll of plastic wrap, no matter how good you make it.


mnem
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Offline Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10710 on: May 16, 2018, 01:03:38 pm »
I'm not buying into all this pessimism. They used to make heaps of highly lethal crap compared to what's sold today. Things we would take one look at today and scoff at how it's a blatantly bad idea. We just romanticise and get fooled by survivorship bias. A lot of things are a lot cheaper than ever and also many times more reliable.
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10711 on: May 16, 2018, 04:23:00 pm »
Inclined to agree. The stuff we have now is orders of magnitude cheaper, reliable to the point that repairs are actually comparatively rare and stupidly powerful yet consuming much less power.

I look at a decent SMD board and get the same fuzzy feeling.

The thing I like about the old Tek stuff is the no compromises engineering, the style and the documentation that comes with it. It’s “quality” as in the difficult to define variety mentioned in Persig’s book on the subject. It feels good using and playing with it. Perhaps because there’s less software.

Good point on survivorship bias. I’ve seen piles of broken stuff in my years which is definitely skip worthy and that includes as lot of nice tek kit which had failed.
« Last Edit: May 16, 2018, 04:24:47 pm by bd139 »
 

Offline ChrisLX200

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10712 on: May 16, 2018, 07:31:05 pm »
Philips Research auction - some interesting stuff up for grabs: https://www2.ppauctions.com/auction.php?id=232
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10713 on: May 16, 2018, 07:47:19 pm »
Thanks for posting that - much appreciated  :-+

Edit: ooh lots of toys in there!
« Last Edit: May 16, 2018, 07:49:33 pm by bd139 »
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10714 on: May 16, 2018, 07:54:22 pm »
Just watching this. Another RIFA on camera:

https://youtu.be/y_L1-VQBcvM?t=450
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10715 on: May 16, 2018, 08:37:02 pm »
Just watching this. Another RIFA on camera:

https://youtu.be/y_L1-VQBcvM?t=450
Yes I saw this one a few months ago, I like watching Simon's videos.
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Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10716 on: May 16, 2018, 08:41:57 pm »
Philips Research auction - some interesting stuff up for grabs: https://www2.ppauctions.com/auction.php?id=232
This is interesting, not too far away either, thanks for posting this info on here, some good stuff.
Who let Murphy in?
 

Online beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10717 on: May 16, 2018, 10:24:44 pm »
'Off Topic'

Is it wrong to play with your blue balls while alone in the shed with the lights off  :-DD

'On Topic'

It's been over a month since I brought my last Anchor now what don't I need  >:D

AWOL for a while longer due to 'stuff'
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Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10718 on: May 16, 2018, 10:35:30 pm »
Well beanflying, get rid of "stuff" then, there's loads of boat anchors out there in Aus waiting to be saved, and if your playing with blue balls, leave them alone for a while, you've overdone it a bit and need to let the bruising settle down.  :-DD
Who let Murphy in?
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10719 on: May 17, 2018, 12:01:26 am »
I'm not buying into all this pessimism. They used to make heaps of highly lethal crap compared to what's sold today. Things we would take one look at today and scoff at how it's a blatantly bad idea. We just romanticise and get fooled by survivorship bias. A lot of things are a lot cheaper than ever and also many times more reliable.

My cynicism has nothing to do with survivorship bias; it has everything to do with the sickening manner in which the corporate mindset has infiltrated our everyday lives. We used to understand on a visceral level the monster that corporations are; an artificial construct designed to do one thing: accumulate money unto itself with no regard for the consequences. The very nature of the Articles of Incorporation makes this inevitable; they are designed to insulate those at the helm from any personal liability for the decisions they make.

We understood this, and we were ever-vigilant, but we tolerated corporations as a "necessary evil" because of their role as an employment engine in our economy. The way things are now, they have by their very nature become an unemployment engine; mindlessly seeking the cheapest labor cost at all cost, whether those doing the work are competent or not, and expecting one person to do 3 people's job at pretty much every level below senior management. They are now no longer "necessary"; only the evil remains.

You're wrong about "how much cleaner" our production process are. I've worked in some of the US plastic manufacturing plants that still exist; in fact, I'm surrounded by them here in Houston. They're not any cleaner; we just don't hear about the accidents because they own the media and the general public doesn't know the true level to which they are poisoning the planet with every product we take for granted because they own the people who are supposed to be protecting us from their toxic waste. It is much cheaper to pay the token fines that they lobby (read: legally bribe public officials) to lower numbers year after year than it is to clean up their manufacturing processes. They only want rules so they can break them.

So no, I'm sorry; it is not my imagination. The corporate model is that of a virus; it consumes its environment with no regard to the consequence, seeking only profit and refusing to pay the cost of what it profits from, even though that is ultimately us and our children. If we don't abolish them, they will be the end of us.

The real terror is this; we in America have been here before. 100 years ago almost to the day we faced this very same existential crisis; the players were even mostly the same few dozen families. It wasn't until they'd squeezed every drop of profit from the populace, plunging us into the Great Depression, that they lost their stranglehold on our government... no money to steal from the common folk means no money to bribe government with.

The big difference now though is numbers; there are exponentially more of us here now than were then and our once-great reserve of natural resources has been plundered to a fraction of what we still had back then. When the next Great Depression hits us it will be tenfold, a hundredfold as horrifying as what my grandparents lived through. And it's not a matter of IF; it's a matter of WHEN.

So yeah; in the midst of all this, it's really not a surprise that manufacturers have abandoned "Quality For its own sake". It is not in their best interest; in fact, it would hurt turnover, which is bad for their profit margin.

And that, of course, is all that REALLY matters.


mnem
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10720 on: May 17, 2018, 12:30:39 am »
As a director of a rather successful SME who’s entire existence is mugging corporations, I agree  :-DD
 

Offline Mr. Scram

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10721 on: May 17, 2018, 12:40:26 am »
Again, I'm not buying it. Corporations do what they've always done. They are and were in the money making business. We simply don't remember the hardships the labour force had to endure back then and our current problems obviously always seem the worst. Your current problems are always the worst problems. Factories were outright lethal places just 100 years ago. That's much better now. Something like building bridges or ships used to cost a certain number of deaths per meter or yard and this was completely acceptable. What also helps is that people are on average more educated now. Even though people still try their best and have moderate amounts of success, it's simply harder to take advantage of more educated people. The fact that educated nations tend to be safe and happy reflects this.

I never said production is cleaner nowadays, I don't know where you got that from and I'm not very interested in the argument either, though I will note there are much more substantial checks and balances in force. Products are demonstrably cheaper, more available and more reliable than they used to be too. No rant is going to change that reality. There's junk being made, but there was horrid junk being made back then. As I said before, stuff that modern people take one look at and know it's a bad idea. There's a lot less of that going on today.

If there are any tangible numbers to discuss I'd be more than happy to do so, but stories about how those are all manipulated by our lizard overlords are going to be taken with an appropriately sized saltmine. It seems you've seen the game played for a number of years and got jaded. It happens to the best of us, but the issue is with the observer and not the observed. Doomsday prophets have existed in all eras.
 

Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10722 on: May 17, 2018, 12:43:02 am »
Philips Research auction - some interesting stuff up for grabs: https://www2.ppauctions.com/auction.php?id=232

Oh crap. That's close enough that running up there to collect stuff isn't too hard and there's loads of interesting things.

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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10723 on: May 17, 2018, 12:43:13 am »
Philips Research auction - some interesting stuff up for grabs: https://www2.ppauctions.com/auction.php?id=232
This is interesting, not too far away either, thanks for posting this info on here, some good stuff.

Am I the only one who is amused by the large quantity of potted plants listed here?

I want to buy them all and ship them to BD139's place of work... I understand they have a shortage of O2 generators/physical security problems...  :-DD

I wouldn't mind snagging that N generator though... or any of the number of nice & big sounding (but no pictures) Kaymar workbenches.


mnem
moo.
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10724 on: May 17, 2018, 12:47:37 am »
'Off Topic'

Is it wrong to play with your blue balls while alone in the shed with the lights off  :-DD

'On Topic'

It's been over a month since I brought my last Anchor now what don't I need  >:D

AWOL for a while longer due to 'stuff'

To quote my wife... "That is so very, very wrong... but it feels SO right... "  >:D

As for your boat anchor drought... I suggest saving your pesos for that auction. Looks quite promising; if only they weren't all closing within the same hour more than 3 weeks from now, even I might get in on the action.  |O


mnem
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