Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 17688371 times)

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Offline Brumby

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24975 on: February 10, 2019, 01:35:24 pm »
A new Y2K problem dawning ?!  >:D

Ah memories. I spent that night at work in case Y2K blew up in our face. It came in with a whimper.  :-//

I wasn't at work - but I was on call.  Nothing to report.

Edit:
Oh we're there!!
 

Offline Kosmic

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24976 on: February 10, 2019, 01:59:05 pm »
Sad news, my trusty Weller WTCPS is dead. The thermistor In the handle is open and the price of replacement part is just ridiculously high.

I should probably stick to Weller but I'm curious about the T12 soldering irons. Will probably order a cheap one from china. KSGER is supposed to be good right ?
« Last Edit: February 10, 2019, 04:31:27 pm by Kosmic »
 

Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24977 on: February 10, 2019, 01:59:56 pm »
Ah memories. I spent that night at work in case Y2K blew up in our face. It came in with a whimper.  :-//
To be fair, a lot of people put in a lot of work to get there.

I did a lot of that work too.
An old gray beard with an attitude.
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24978 on: February 10, 2019, 02:06:46 pm »
Ok back home now. Hamfest sightings:

1. Tek 2445 + 2465. Both working but 2465 was dinked badly.
2. Tek 7633. Working (ish).  Looked like power supply was on the way out. 
3. Lots of HP power meters. Junk as no sensors.
4. Tek 475A + DM44 - fully working nice condition but already have one. I did consider this for a bit.
5. Big old Heathkit bench supply. Felt sorry for this but skipped it.
6. Heathkit AC voltmeter. Already had enough of one of those. Price was reasonable.
7. Boxes of shite. Literally junk. Rusty knackered and corroded shit.
8. Lots of rip off traders. 5x BC547's in a bag for £1. Get to fuck. They are 5p if that transistors.
9. Some Tek 1502 TDRs but I don't need one.
10. Rancid toilets. Decided to wait until I got home to lay a cable.

Next one Kempton. Fortunately only up the road from me.
 

Offline factory

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24979 on: February 10, 2019, 02:41:49 pm »
To complete the story, let me tell you about another item a member here "shared" with me recently....

It was an eBay auction for an old Tex 502A dual beam CRO located in Sydney (about an hour's drive each way for me).  It had crud all through it, the 5AR4 rectifiers had been removed and the upper focus control had the shaft broken off.

My 502A had a similar problem with the intensity balance control, someone had broken the plastic shaft on it too, it's currently got a ex-HP one bodged in as I don't have anything else suitable that would fit.
Other casualties so far have been the neon regulator tube & a couple of other tubes which had cracked with corrosion, also the 2N2043 in the trigger circuit decided it wanted to fall to bits (the gold plate on the legs & the sleeving were the only things keeping the rust together). Still need to get round to sorting that & buy some of the silver solder for using with the tag strips.

David
 

Offline Kosmic

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24980 on: February 10, 2019, 02:53:13 pm »
So one thing that has always puzzled me...Tek scopes tend to have nice UI. My 2465B is a perfect example of that. Everything is logically laid out and easy to find without looking once you get a bit of practice using it. HP RF gear is largely the same way. Why on earth do Tek spectrum analyzers and things (at least the old ones) have such busy and frankly bad UI?

It's not that bad. I have a 2794 (and at some point a 492), and it's easy to use. Nevertheless, I think in the 80s and 90s HP was far more advanced on the software front. They started putting better MCU in their equipment and removing mechanical switch button and trim. HP screens were the best and a lot of functionalities were moved to the screen UI.

Look like on the Tek side they were more conservative (in the 80s and 90s) still building equipment how they used to do. It's crazy the number of trimmer you need to adjust to calibrate a 2794  :)
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24981 on: February 10, 2019, 03:00:13 pm »
Wow. 1,000 pages already
Who let Murphy in?

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

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24982 on: February 10, 2019, 03:03:05 pm »
Ok back home now. Hamfest sightings:

1. Tek 2445 + 2465. Both working but 2465 was dinked badly.
2. Tek 7633. Working (ish).  Looked like power supply was on the way out. 
3. Lots of HP power meters. Junk as no sensors.
4. Tek 475A + DM44 - fully working nice condition but already have one. I did consider this for a bit.
5. Big old Heathkit bench supply. Felt sorry for this but skipped it.
6. Heathkit AC voltmeter. Already had enough of one of those. Price was reasonable.
7. Boxes of shite. Literally junk. Rusty knackered and corroded shit.
8. Lots of rip off traders. 5x BC547's in a bag for £1. Get to fuck. They are 5p if that transistors.
9. Some Tek 1502 TDRs but I don't need one.
10. Rancid toilets. Decided to wait until I got home to lay a cable.

Next one Kempton. Fortunately only up the road from me.
So it was a crap event then, which one was that so I make sure not to visit it in the future

Edit;
Just caught up with the other postings, it was Harwell, then.
« Last Edit: February 10, 2019, 03:07:35 pm by Specmaster »
Who let Murphy in?

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

Offline Cubdriver

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24983 on: February 10, 2019, 03:05:12 pm »
A new Y2K problem dawning ?!  >:D

TEA1k?

-Pat
If it jams, force it.  If it breaks, you needed a new one anyway...
 

Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24984 on: February 10, 2019, 04:54:27 pm »
To complete the story, let me tell you about another item a member here "shared" with me recently....

It was an eBay auction for an old Tex 502A dual beam CRO located in Sydney (about an hour's drive each way for me).  It had crud all through it, the 5AR4 rectifiers had been removed and the upper focus control had the shaft broken off.

My 502A had a similar problem with the intensity balance control, someone had broken the plastic shaft on it too, it's currently got a ex-HP one bodged in as I don't have anything else suitable that would fit.
Other casualties so far have been the neon regulator tube & a couple of other tubes which had cracked with corrosion, also the 2N2043 in the trigger circuit decided it wanted to fall to bits (the gold plate on the legs & the sleeving were the only things keeping the rust together). Still need to get round to sorting that & buy some of the silver solder for using with the tag strips.

David

While the silver solder is required for the ceramic strips you CAN....in SMALL amounts...use regular lead/tin solder for quick fixes. Just don't go crazy with it and be careful.
An old gray beard with an attitude.
 

Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24985 on: February 10, 2019, 05:04:22 pm »
More DMM calibrations. The excellent, the good, and the downright ugly.


First, the excellent. Vintage 1997 Series “1” Fluke 87. The Fluke retorted....”You know I never need calibration. Why do you bother?”




Next, the good. It's older sibling Fluke 8021B. It just needed a minor tweak.




Finally, the downright ugly. Chinese Mastech MS8040. Before I completely condemn this DMM as potential junk I need to say that I don't have a service manual so I'm winging it. There are 2 unmarked multi-turn pots on the board. One clearly adjusts the DCV. The other does nothing that I can figure out. I've gone to the Mastech website to see if service manuals are available and the answer is no. I originally purchased this DMM from Amazon and was sourced from Circuit Specialists so I'm going to e-mail them and see if a service manual, or perhaps just a schematic, is available.

Anyway, I had to adjust for best compromise between 190mV, 1.9V, and 19V. It's not bad but compared to the 40 year Flukes they blow this Mastech away in accuracy. But it does have useful features the Flukes don't such as capacitance and temperature. So it does have some value.   

An old gray beard with an attitude.
 
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Offline neo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24986 on: February 10, 2019, 05:36:22 pm »
Wish i had something productive to share, instead i stayed up too late (night shift) and did this.







My server rack not only full but loaded with nixies and red leds. No LCDS here!
A hopeless addict (and slave) to TEA and a firm believer that high frequency is little more than modern hoodoo.
 
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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24987 on: February 10, 2019, 05:40:18 pm »
Hey, don't sell yourself short. I consider that "productive" too.  :-+
An old gray beard with an attitude.
 
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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24988 on: February 10, 2019, 05:45:28 pm »
Oh and speaking of cats. I like both cats and dogs but generally prefer cats. Have had several of both over the years. But not here. Landlord sez no pets.  :--

Pretty soon bd139 will chime in saying how much he hates cats.  :-DD

I've lived with both... and both have their place, and it mostly depends on the type of affection you need from your pet; which of course, depends greatly on where you are in your own life. A dog's love is generally pretty much unconditional; they'll love a bad master as much as a good one, and if you get them at the right age there's not a damned thing they can do about it. It's the fawning "I love you, I love you! Kick me, beat me, I love you!" kind of love that if anything can be downright disturbing at times, if you as a person have any kind of sense of spirit about you.

But there are times when we, weak and fallible creatures that we are, NEED that kind of love. It's a big, cold, lonesome universe out there... and having at least one living thing in it, no matter how weird the relationship may be, that gives a damn if you live or die is an important thing. Sometimes it is the most important thing... to have some reason to get up in the morning, shake off the scales of Hypnos, and put feet on the floor can be the only reason we have to get on with our lives after some horrible loss.

I had two such dogs as a small child; one a massive Alsatian bitch who took me as one of her own pups when I was still barely a wiggler, and raised me as much as my mother and grandmother did. She was preternaturally smart; we all swore that she tried to speak to us. I survive to this day growing up on the family farm only because of her due to several "Timmy fell down a well" type incidents where she was there and saved me directly Lassie-wise or got help from grown-ups.

And then again, when it was just me and my mother against the cold cruel universe, we happened into a Doberman-Husky mutt... that we at first thought to crop tail & ears like a proper Alsatian, but didn't have the heart (or the funds for the vet bill) and in retrospect would have been like lipstick on a pig. That animal was with us through some of the best and worst times of our life together after the grandparents died... she lived much too long, and when she passed peacefully in her sleep she was almost blind, barely able to get around due to arthritis, incontinent half the time and we had been debating for several months over whether to put her down... but any time any either of us paid her the least bit of attention she was so blissfully happy... we couldn't bring ourselves to take that joy away from her.

If you are a moderately grown-up person with any kind of spiritual apprehension, that is the hardest part when the end time comes; the hard, critical self-inventory we must take of ourselves when deciding whether or not it is time to put a pet down. To know in your heart it is not a matter of ending the inconvenience, but really only ending their suffering, is the hardest part of that relationship. And for many people, one of the few moments of real spiritual growth in an entire lifetime.

When a cat loves you... it's much more conditional. A cat has a sense of self; it is an independent creature and if you treat it poorly, it will leave. Some people will say cats can't love people; I know for a fact this isn't true. My teenage "littermate" was one such cat; when I had to leave him with my mother to go off to college, it literally pined away for me and died of self-neglect over the course of a few months. I was a horrible master at the time; I know in retrospect even the sound of my voice would probably have saved him; but I couldn't be arsed to call home but once or twice a month then.  :palm:

*Sigh*

The deciding factor for most of us comes down to what we are willing to trade off vs what kind of love we need from a pet. I've long felt that the only kind of love worth having is conditional... that which is measured, considered and if you treat the other poorly it will go away. For the most part, once a dog imprints on a human it cant imagine leaving; it has to be left behind to sever the relationship;  If a cat doesn't like you, it will leave and take its affection with it. Its affection is is earned; a product of mutual respect and a generally true understanding of each other.

As an adult, I generally preferred the affection of a cat for that reason; it feels less "Stockholm Syndrome" and more valid. The problem then is the "living with" part of living with a cat or a dog... and in general, dogs are much easier to live with. They're neater, they're (usually) less mischievous and too lazy to jump up on the countertop for a tidbit, and they're easy to house-train. My crazy cat taught himself to go potty in the toilet after watching us people do it; we just had to learn to leave the lid up for him. But normal people with normal cats have to learn to live with a litterbox, which is a pretty big lifestyle caveat and a lot to put up with for the affection a cat gives. And you'll not likely be awakened by your dogs chasing each other around her house and stepping on your tongue at 2AM, as I know from experience is not only possible, but probable with cats.  :-DD

I have a similarly measured and considered kind of love with my wife; I know she is an independent woman, and if I fuck up our life too badly, she is more than capable of packing herself and our kids up and leaving. It means I actually have to put some work into our relationship; which is why almost 20 years after we met I'm still ass over tail in love with her.

And knowing what a horrible, forgetful, taking-them-for-granted pet owner I am, I think it's probably better that the only animals I have in my life right now are of the 2-legged variety. And legally my dependents. ;)

mnem
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Online Wolfgang

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24989 on: February 10, 2019, 06:01:20 pm »
Wish i had something productive to share, instead i stayed up too late (night shift) and did this.

My server rack not only full but loaded with nixies and red leds. No LCDS here!


... TEA is like Hotel California. You can check out anytime, but you can never leave.
I suppose your photos are directly from the masters chambers, am I right ?!  ^-^
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24990 on: February 10, 2019, 06:12:55 pm »
Yep, I think you pretty much nailed the cat thingy there. I used to have a neighbour who had about 3 kittens over the years and when they grew into adults, they were pretty much left their own devices and then after a while we would notice that they hadn't been spotted around for awhile. Then one day I had to go and see the doctor who has the surgery in the next street and while sitting in the waiting room waiting my turn, I spotted one of the cats sitting at outside the front door of a house and the door opened and in walked the cat. A clear example of just what you was saying about the love being conditional. I have had 5 cats, 2 of which are still with me now, 2 of the others lived for 18 years and the first one for 16 years. Absolutely no way they was going to leave me, the first cat was gone for over a week and we had given up on seeing him again, then one night there the usual banging at the door (he used to bang the door with his front feet  :)) and opened the door and he shot in. He was thin and we think he must of got shut in a shed or something, after that he was like a shadow, were we went, he went, trotting along right behind us. One the next 2 used to get shut in a neighbours garage overnight and in the morning she'd be back knocking on the door (learnt to knock from the first cat).

The current pair likewise, are not going anywhere, the biggest one is like a dog, if we go and work in the garden, or the garage she's right there with us, when we come in, so does she, I love em.  :-+
Who let Murphy in?

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

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24991 on: February 10, 2019, 07:08:29 pm »

Still need to get round to sorting that & buy some of the silver solder for using with the tag strips.

David

While the silver solder is required for the ceramic strips you CAN....in SMALL amounts...use regular lead/tin solder for quick fixes. Just don't go crazy with it and be careful.

I still intend to buy a small roll while it's still available, something like this one from RS (62Sn/36Pb, 2%Ag);
https://uk.rs-online.com/web/p/solders/1047606/

David
 

Offline VK5RC

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24992 on: February 10, 2019, 08:26:08 pm »
It sounds pretty extravagant, but I have converted to using 2% silver for most of my smaller joints-smd and pcb , not where larger amounts are required. It flows beautifully, and the 'gossip' is that whiskers are rare.
Also I don't use that much solder.
Rob
Whoah! Watch where that landed we might need it later.
 

Offline nixiefreqq

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24993 on: February 10, 2019, 08:44:31 pm »
Wish i had something productive to share, instead i stayed up too late (night shift) and did this.

My server rack not only full but loaded with nixies and red leds. No LCDS here!


that's quite a score.  it totally answers the question about wwnd?

just a heads up about a very common problem in the 141t.   some day you might hear an arc.  and then the display will be dead.

don't panic.  there is a ribbon cable that carries 6kv and two lower voltage leads to the crt.  it gets old and crusty and arcs.

fixed a couple of units by making new ribbons with plastic lamination sheets found at office depot and 30 awg enameled wire. it solved the arcing problem.

when the arc happens it takes out diode cr26 on the a5 pulse board.  iirc you can replace it without even having to pull the board. (i should still have original replacements in a box downstairs if you need any)

the 141t/8555a combination is a sweet instrument.  they are getting really really old and cranky, but you should have no problem keeping it going.


freqq


free range primate
 
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Online tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24994 on: February 10, 2019, 09:24:28 pm »
4. Tek 475A + DM44 - fully working nice condition but already have one. I did consider this for a bit.
9. Some Tek 1502 TDRs but I don't need one.

Since they sold for the asking price, clearly they were too cheap :)

I got a Tek 184 time mark generator and a Tek 191 constant amplitude signal generator. Was tempted by some Sullivan resistance boxes, but I have some already.
« Last Edit: February 10, 2019, 09:30:44 pm by tggzzz »
There are lies, damned lies, statistics - and ADC/DAC specs.
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24995 on: February 10, 2019, 09:48:33 pm »
I think you must have got in earlier than me :)
 

Online tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24996 on: February 10, 2019, 09:52:00 pm »
I think you must have got in earlier than me :)

I paid for that privilege; twas good to jump the queue :)
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
Having fun doing more, with less
 

Online tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24997 on: February 10, 2019, 09:53:05 pm »
Ding

Post 25000, page 501.
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
Having fun doing more, with less
 

Online xrunner

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24998 on: February 10, 2019, 10:33:38 pm »
Ding

Post 25000, page 501.

Wow - I just had to quote it.  8)
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Offline beanflying

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #24999 on: February 10, 2019, 10:50:50 pm »
Oh and speaking of cats. I like both cats and dogs but generally prefer cats. Have had several of both over the years. But not here. Landlord sez no pets.  :--

Pretty soon bd139 will chime in saying how much he hates cats.  :-DD

I've lived with both... and both have their place, and it mostly depends on the type of affection you need from your pet; which of course, depends greatly on where you are in your own life. A dog's love is generally pretty much unconditional; they'll love a bad master as much as a good one, and if you get them at the right age there's not a damned thing they can do about it. It's the fawning "I love you, I love you! Kick me, beat me, I love you!" kind of love that if anything can be downright disturbing at times, if you as a person have any kind of sense of spirit about you.
..........

And knowing what a horrible, forgetful, taking-them-for-granted pet owner I am, I think it's probably better that the only animals I have in my life right now are of the 2-legged variety. And legally my dependents. ;)

mnem
*PokeTime*

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Coffee, Food, R/C and electronics nerd in no particular order. Also CNC wannabe, 3D printer and Laser Cutter Junkie and just don't mention my TEA addiction....
 
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