Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 1530075 times)

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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15750 on: September 02, 2018, 02:01:21 am »
Wut? Huh?  :-//

This might be a little more interesting if you had a better picture of Brandi.  >:D >:D :-DD :-DD
An old gray beard with an attitude.
 

Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15751 on: September 02, 2018, 04:17:27 am »
Wut? Huh?  :-//

This might be a little more interesting if you had a better picture of Brandi.  >:D >:D :-DD :-DD



The character we've 'adopted' as Brandi is really Red Sophia, a parody of Red Sonja.
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 

Offline neo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15752 on: September 02, 2018, 05:03:07 am »
She's probably not just collecting them, but has a real use for them as well (Marmalade?). I have hundreds of preserving jars. I also use them (this year's peaches are numerous, but hardly bigger than their stones - not worth the effort of preserving them).

She had a reason for the first couple dozen. Past those not really and even with those she doesn't can much anything anymore, no time and no garden.
A hopeless addict (and slave) to TEA and a firm believer that high frequency is little more than modern hoodoo.
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15753 on: September 02, 2018, 05:48:00 am »
 

Offline factory

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15754 on: September 02, 2018, 05:58:47 am »
An update on the faulty HP 5248M counter.

Last weekend I decided to sort out the seized latch preventing the removal of the plug-in, this went OK but it was very fiddly to put all the display parts back together, many of the decimal & symbol neons have parted company from their rusty legs in the process, so I will have to repeat this at some point to replace them.



Also I confirmed the tunnel diode on the A17 high speed counter board was open circuit, that area was oscillating at high speed even with the A21 function board removed. A salvaged & tested 1N3718 was fitted today, and finally it stopped counting.



It now seems to be behaving the same as Cubdriver's 5248M, i.e. it only counts with the crystal oscillator output on the back connected to the external oscillator input, also some ranges and functions are still faulty.
So I still need to work on the A17, A21 boards and the first two display boards.



David

PS The two darker nixie's are not faulty, just a different brand/type (NEC).
« Last Edit: September 02, 2018, 08:10:06 am by factory »
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15755 on: September 02, 2018, 06:42:05 am »
Whoah... now that is some hardcore "tired iron" resurrection.  Reminds me of my shovelhead & softtail chopper projects as a youth... hours and hours of grunge and "fiddly bits".  :clap:

mnem
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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15756 on: September 02, 2018, 06:45:29 am »
Wut? Huh?  :-//

This might be a little more interesting if you had a better picture of Brandi.  >:D >:D :-DD :-DD


The character we've 'adopted' as Brandi is really Red Sophia, a parody of Red Sonja.

OMG, I was married to English redhead once.  :palm: They are batshit crazy.  :scared: :scared:
An old gray beard with an attitude.
 

Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15757 on: September 02, 2018, 07:11:29 am »
Snap. Still am. Can confirm
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15758 on: September 02, 2018, 07:23:30 am »
I saw one in the Chelmsford branch of Iceland today, and she was giving her husband both barrels in public, so yep, they are batshit crazy alright, poor bloke, like a rabbit caught in the headlights, never knew what hit him  :palm:
Who let Murphy in?
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15759 on: September 02, 2018, 07:34:54 am »
Wut? Huh?  :-//

This might be a little more interesting if you had a better picture of Brandi.  >:D >:D :-DD :-DD


The character we've 'adopted' as Brandi is really Red Sophia, a parody of Red Sonja.

OMG, I was married to English redhead once.  :palm: They are batshit crazy.  :scared: :scared:
Nuthin' compares to redheads with green eyes, which virtually all are some significant portion of Gaelic/Scottish lowland descent. Every one I've ever known were at the same time stunning physical presences and brilliantly volatile, bordering on bipolar personalities.

I have a thing for inconvenient females. ;)

mnem
"If the fire in my belly matched the fire in your eyes, my dear... the whole world would be consumed in the aftermath of our union." ~ unpublished works
 

Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15760 on: September 02, 2018, 07:38:02 am »
Yep, she was 2nd generation English. Her grandparents came from somewhere in England and had a dairy farm in Maine. She spoke with that heavy New England accent just like the Kennedy's. Cute little thing but freaking nuts.  :o
An old gray beard with an attitude.
 

Offline URI

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15761 on: September 02, 2018, 08:37:20 am »
..back ontopic..   :popcorn:

Inspected my "new" HP 4260A LCR meter.

First I discovered that the digital LCR-counter didn't go down to 0000 mechanically, lowest was ~0006.
So that was probably the reason why my small value caps (68nF/1nF) measured with a significant error.

To fix (aka calibrate) that the service manual said, I should loosen two screws. Incorrect. Version mismatch?
I loosened 17 screws in the end, took off all knobs and removed the front plate to be able to loose three more screws to get the counter gear separated from the potentiometer (R3) gear.   :palm:

The manual said that at 0000-position the potentiometer R3 should have 5Ohms. In fact it had 22Ohms at 0000-position, but when counting up the LCR-counter it first went down over a minimum of 2.5Ohm to then go up to 5kOhm..
This potentiometer (5kOhm type) is so delicate you have to use an appropriate (=analog) meter otherwise even a 2 1/2 digit resolution of a DMM will drive you crazy.    :-/O  :scared:
To complete this calibration I had to work on another two grub screws in the hub of the gear-wheel sitting on the shaft of potentiometer R3.
Now at 0000-postion R3 has ~5Ohms on my analog meter.   :box:

After fixing that I poked around a bit, pulled all card boards out and put them back in...
Everything looked good -besides being relatively old.

Now, after putting the 4260A back together, the 1µF foil cap measures 0,97µF and the 68nF foil cap measures 68,5nF, both with D<<0,001.
Electrolytic caps with higher D-Factor of 0.2 - 0.4 all read to low, for example one of my new 820µF caps reads ~640µF with D ~0.35.
The 470µF electrolytic cap that measured ~70µF now measures ~386µF.    :-//

But not too bad until now.   :-+
Will inspect further.

Toddles off to bed..
A life without TEA is possible but pointless.
 

Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15762 on: September 02, 2018, 09:27:14 am »
Good progress!  :-+ Keep us updated.
An old gray beard with an attitude.
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15763 on: September 02, 2018, 09:41:06 am »
(SNIP)

Now, after putting the 4260A back together, the 1µF foil cap measures 0,97µF and the 68nF foil cap measures 68,5nF, both with D<<0,001.
Electrolytic caps with higher D-Factor of 0.2 - 0.4 all read to low, for example one of my new 820µF caps reads ~640µF with D ~0.35.
The 470µF electrolytic cap that measured ~70µF now measures ~386µF.    :-//

But not too bad until now.   :-+
Will inspect further.

Toddles off to bed..
That's to be expected, I suspect; at the time that instrument was made, brute-force filter capacitors were still primarily tested at pretty low frequencies appropriate to linear power conditioning. Even DC-DC converters operated at much lower frequencies than they do now. Modern caps now have much lower ESR; pretty much anything larger than 220uF will show 0.0xx or 0.00x ohms; I'd think that's GOTTA affect the accuracy of the capacitance reading the capacitance ratings over the decades. That unit operates at a fixed 1KHz; now they test at 1KHz/10KHz/100KHz to get a slope of Capacitance vs ESR.

*Checks fleaBay*

My DE-5000 was scanned at Osaka INTL Airport Yesterday... I might have stateside tracking by Tuesday!  :-+

mnem
SQWEEEE!!!
« Last Edit: September 03, 2018, 01:17:44 am by mnementh »
 

Offline Ero-Shan

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15764 on: September 02, 2018, 06:46:00 pm »
An update on the faulty HP 5248M counter.

Great job so far! Lots of work, but with a counter like this, very rewarding! I'd rather look at engineering pieces of art as this is one of than at paintings like the 'Mona Lisa'.

It truly deserves to be restored!  :-+
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15765 on: September 03, 2018, 01:00:39 am »


How Software Development (And Hardware Development in the Modern Corporate Environment) Works

I just binged and caught up on XKCD; this one REALLY struck a chord.  :palm:

mnem
« Last Edit: September 03, 2018, 01:22:58 am by mnementh »
 

Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15766 on: September 03, 2018, 01:22:14 am »
That XKCD is basically my life so far.

I did a stupid thing last week and took another renewal at the same outfit so I’m back on the wagon again as of Thursday  :--
 

Offline xmo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15767 on: September 03, 2018, 01:23:51 am »
Well, guys - thanks for reminding me that I still carry the scars of a red-head encounter.

Kind of like an RF burn - deep and painful and a takes long time to recover....
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15768 on: September 03, 2018, 01:27:40 am »
That XKCD is basically my life so far.

I did a stupid thing last week and took another renewal at the same outfit so I’m back on the wagon again as of Thursday  :--
And of course, I found and posted the one on "Computer Voting" just as you were posting...  :-DD [F5]...[F5]... [F5]...

mnem
Murphy's a bitch, and she has puppies.
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15769 on: September 03, 2018, 01:32:20 am »
That XKCD is basically my life so far.

I did a stupid thing last week and took another renewal at the same outfit so I’m back on the wagon again as of Thursday  :--
What happened to your product venture then?
Who let Murphy in?
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15770 on: September 03, 2018, 01:34:01 am »
Well, guys - thanks for reminding me that I still carry the scars of a red-head encounter.

Kind of like an RF burn - deep and painful and a takes long time to recover....
Good lord... encounters like that aren't scars (although they do often come with actual scars :-DD ); they're proof that you've LIVED.

Don't try to bury the experience; wear it as a badge of honor.   :-+

mnem
*Veteran of a Thousand Psychic Wars Failed Love Affairs*
« Last Edit: September 03, 2018, 01:37:39 am by mnementh »
 

Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15771 on: September 03, 2018, 01:35:43 am »
Well, guys - thanks for reminding me that I still carry the scars of a red-head encounter.

Kind of like an RF burn - deep and painful and a takes long time to recover....

Amen Brother.  :-+ They will rip your heart out and stomp on it with no regrets.  :scared:
An old gray beard with an attitude.
 

Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15772 on: September 03, 2018, 01:36:53 am »
That XKCD is basically my life so far.

I did a stupid thing last week and took another renewal at the same outfit so I’m back on the wagon again as of Thursday  :--
What happened to your product venture then?

Yes indeed; do tell. Enquiring dwagons want to know.  };=)~~~~<

mnem
:popcorn:
 

Online bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15773 on: September 03, 2018, 03:04:36 am »
Delivered and handed over ages ago. Works pretty well so far I understand. I have had to answer a few emails about it every week and sorted. Easy money. It’s a risk profiling engine that understands relationships between people over time as well as their history and association basically. Nearly all current profiling engines fall short on laundering and mispurposed products which this one doesn’t. Massive problem that screws us all. Dude who pulls that £8k loan and hits a casino then defaults immediately is the sort of thing this stops.

Edit: Facebook has been mentioned as a possible data source...
« Last Edit: September 03, 2018, 03:12:33 am by bd139 »
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15774 on: September 03, 2018, 03:17:23 am »


Delivered and handed over ages ago. Works pretty well so far I understand. I have had to answer a few emails about it every week and sorted. Easy money. It’s a risk profiling engine that understands relationships between people over time as well as their history and association basically. Nearly all current profiling engines fall short on laundering and mispurposed products which this one doesn’t. Massive problem that screws us all. Dude who pulls that £8k loan and hits a casino then defaults immediately is the sort of thing this stops.

Edit: Facebook has been mentioned as a possible data source...

Yeah, we know about that one, but you announced that you were going to be developing a consumer product yourself rather than working for someone else, that and a number of other ideas you had?
Who let Murphy in?
 


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