Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 1369633 times)

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Online tautech

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10050 on: April 30, 2018, 01:58:48 pm »
(SNIP)
Still may get one of LCR-T1 color testers though, just so I can reality-check it.  >:D


mnem
The moose is loose... Uhh, tighten 'im up a little, willya?
While 'the moose is loose' seriously consider these:
https://www.ebay.com/itm/Smart-Tweezers-Colibri-LCR-ESR-Multimeter-Capacitor-Tester-Simplified-Economical/322191163501?hash=item4b0417006d:g:KvAAAOSwYSlXhnqS

Years back I borrowed an LCR nulling bridge from a buddy and took an awful long time measuring and labeling all the choke/inductors that I'd 'saved' from the days when I was too tight to buy much. Dozens of the buggers.
Not long after when starting to do some SMD repair I got a pair of Advance Devices ST3 LCR tweezers and never looked back. Use them for much faulty component identification and they're heaps faster than a DMM for this.
Auto mode measure uF and ESR just as quick as any DE-5 something (seen on many vids) and IMHO you've got a more versatile tool. The ST3 does a bit more than the Colibri but if you want/can afford/need the ducks nuts then the ST5S Pro is the one to go for.
So you might say what can you do with just a pair of tweezers.....well big axial caps with short leads are about the only thing that tests them physically but everyone has a soldering iron....don't they ?

Anything that might happen to my ST3 would result in instant replacement with their updated model:
https://www.ebay.com/itm/Smart-Tweezers-ST5S-PRO-LCR-ESR-Multimeter-Capacitor-Tester-ST-5S-FULL-VERSION/322252843089?hash=item4b07c42851:g:W58AAOSwoudW3AmC

*not scared of spending a $ on good gear !*

I actually have one of the Mastech LCR tweezers; while it is similar in accuracy to the Mega328 (meaning hobbyist quality, no more or less) I did find that it confirmed my prior experience with a pair of LCR-Pro tweezers in a friend's lab: Smart tweezers are a part-losing PITA (at least in my tired old mechanic hands) and horribly subject to intermittent connection inaccuracy.

Plus, I keep accidentally stabbing myself with the pointy little fu**ers.  :-DD  I much prefer the SMD pads on my original Mega328 for sorting parts.



There does appear to be an economical contender in the Smart Tweezer arms race; the Global Specialties LCR-58 at 1-3% advertised accuracy DOR. TEquipment has it for $86 right now.


Cheers,


mnem
Oww, oww, oww dammit OWWW!!!
I've mentioned the AD tweezers a good few times on the forum to date and a few have taken on the challenge and got a set. I don't know any that have been disappointed.
I don't use them for SMD population instead using a much finer set of stainless tweezers, so you wouldn't want to tangle with the points on those !  :scared:
I use these ST3's for everything after the preliminary checks/measurements with a DMM.
Used to their capabilities they will change how you fault find a PCB......all PCB's, SMD, TH, in fact everything.

Sometime after I got mine I also grabbed a Mastec set for curiosity but there's a massive difference in capability and quality compared to even the old ST3. Gave them away as I don't need 2 pairs of SMD tweezers and especially a pair I don't have faith in.
In short, on my bench they are a highly valued piece of TE and not just something I use on SMD or for tweezer needs as there's better tweezers for that.
Probably only an Atlas or $20 transistor tester is needed now to complement what I have already for faster matching of Hfe's or part identification.
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Online tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10051 on: April 30, 2018, 05:07:35 pm »
That's not a 2465B. It's not even an 'A'. It's a first gen 2465, just like mine! No SMT A5 board! This is my practical side trying to deceive my TEA side. It blinded me. But the truth is out.

Yes, but the RIFAs are that much older. In my 2465 one vapourised the series resistor, took out a 1cm patch of the PCB prepreg, and carbon was deposited along the airflow path. Yuck.

I suspect that has happened to the one near me :(
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 #10052 on: April 30, 2018, 05:25:17 pm »
tggzzz: have you seen this? Not terribly far from you :D

https://www.gumtree.com/p/medical-laboratory-equipment/tektronix-2465-300mhz-oscilloscope-fully-working-/1296704580


I'd grab it if it was a bit closer but it's about £45 (plus food) of travel for me plus a whole day out :(
« Last Edit: April 30, 2018, 05:27:26 pm by bd139 »
 

Online tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10053 on: April 30, 2018, 05:41:10 pm »
tggzzz: have you seen this? Not terribly far from you :D

https://www.gumtree.com/p/medical-laboratory-equipment/tektronix-2465-300mhz-oscilloscope-fully-working-/1296704580


I'd grab it if it was a bit closer but it's about £45 (plus food) of travel for me plus a whole day out :(

Shhh!

Swansea is at the wrong end of the M4, over toll bridges. The car cost would be £80 at HMRC rates (which I use to try and convince myself that I don't want something).

I'd want to pick it up in person, since there are too many ways that someone can fail to pack it for couriers, and there's no way of getting your money back from gumtree.
« Last Edit: May 01, 2018, 05:09:20 am by tggzzz »
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
 

Offline Ero-Shan

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10054 on: April 30, 2018, 06:05:42 pm »
Yes, I like the little add in meter and its all modular so I can it as mentioned, wall socket to DUT, Variac to DUT, Dim Bulb to DUT, Isolation Transformer to DUT or any combination so I could if required, go isolation transformer, Variac, DUT with the meter inserted anywhere along the chain. Its particularly useful with the Variac as you don't need to tie up any of your multimeters in order to monitor the voltage being applied to the DUT.
OK. You won. This is so much nicer than my crappily built box with 4-mm sockets to connect meters to!  :-+
A very useful piece of equipment. The one small minus is for the minimum voltage of 80 volts. Better still than needing a separate supply.
 

Offline Ero-Shan

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10055 on: April 30, 2018, 06:20:27 pm »

You're welcome!

Hmmm... seems I can get right through the checkout to the payment page on my PC, as long as I'm logged into my account. Maybe you need hop on a PC and create an account? There's always the option of using your PayPal card as a credit card as well; gives you a 2nd layer of security even if you have to use a public PC. I agree it would be a lot easier if they just took PP directly though...

mnem
*tsk-ily*

Sorry, I don't grok this. I have an account (almost since ABE started), and I'm using a 'real' computer. I have no PayPal account, though, and no mobile phone. I do have a credit card since ages, but when they sent me the newest, they made 2 factor authorization mandatory, and the second factor must be a mobile phone. The only thing I can use the credit card for now is scrapping of stickers from TE.  :(
 

Offline Ero-Shan

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10056 on: April 30, 2018, 08:14:43 pm »
On another topic, no parcel arrived Saturday so it must surely be here tomorrow and I'll find out the damage for a re-calibration of the 3478A as well tomorrow I have emailed them already.

The same here. Just checked and saw that my PM2421 is supposed to ride with Hermes. That's bad news. Nine out of ten times Hermes arrives one or two weeks late here with a red sticker on them: "Irrläufer" (misrouted mail). And all of them are correctly addressed.
It must be me. My c't (magazine) should have arrived on Friday also. It's still not here. And I saw the postman pass an hour ago (extremely early - most of the time it's about 4 pm.).  :--
 

Offline Ero-Shan

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10057 on: April 30, 2018, 11:52:09 pm »
Part I.

Saturday's lawn-mowing was only part of the household chores I'd sworn to do during this long weekend. While eagerly waiting for my parcel to arrive, I commenced the ironing marathon. And miracles do happen! To be fair to Hermes, they did deliver the thing today. Which means I sat there with the cardboard box in my sweaty hands and could not open it immediately. Instead I had to hoover and wipe the floors (the latter is associated with real physical pain, so I keep deferring it for too long). As I expected to get hungry eventually, I also had to go and buy something to eat.

But then I finally got around opening the box, and here it was: The PM2421 that was solely responsible for my relapse! Except for the styrofoam placed directly in front of the front :) that left tiny pieces all over and in the binding posts, it was properly packaged. Well, some of the upholstering looked a bit on the "good opportunity to get rid of some garbage" side. The meter looked good apart from the loose mains switch - thus I've not yet powered it up.

Here's some pictures of this beautiful instrument. Even if it doesn't work and I can't get it to, I'm not sorry for the 30 € (with shipping).



This case is made to last:



That label implies some pride (my reading):



And the innards, so full of colors! I could look at them for hours.  8)







Hope I'm not violating any rules by posting lots of biggish pictures (I do scale them down to 50 % however).
If you're offended by this, please let me know.

Now if you take a closer look at the labels above the switches on the front, you'll probably see why I just had to have this baby.  :-+

Ero-Shan, whose mood lightened up considerably during the last hours.
 
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Online Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10058 on: May 01, 2018, 12:13:10 am »
The delivery man has been and delivered my Advance SG63A signal generator, weighs a bloody ton, nearly had a heart attack lifting it up  ???. Opened it and its well made, pictures to follow and connected it the scope and frequency counter and it appears to be 100% spot on both modulation (AM and FM) and frequency is also seems to there well within the specification. more to follow later, chores beckon.
« Last Edit: May 01, 2018, 01:43:33 am by Specmaster »
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10059 on: May 01, 2018, 12:29:25 am »
That’s a proper bit of kit. Good haul.  :-+

Nothing exciting to report today. I spent three effing hours measuring and matching 200 crystals by hand to make IF filters (while on a phone conference - Ho Ho Ho). Got two sets out of that for 200Hz and 3KHz IF strips which wasn’t bad. TF930 battery went flat finally as well.
 

Offline GerryBags

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10060 on: May 01, 2018, 01:04:31 am »
Ero-Shan, that is gorgeous! Would that, then, be a VTDMM?

Erm, guys? I just received the closest equivalent of the NTC 7.5 Ohm thermistor from the A2 board on my 2467B. The leads on the old one (the larger of the two on the edge of the board) has gaps between the leads and the case on both leads and the resistance is high. The closest I could find was a 7 Ohm 10A but it's about 50% larger, physical size and it's radial, not axial. Does anybody know of a better equivalent to 75DJ7R5K-RO-220? The same part in a later copy of the SM is: 307-0350-00.
 

Online Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10061 on: May 01, 2018, 01:33:01 am »
I tried very hard to ignore it 8) but I couldn't help myself, I'm now the proud owner (at least till I see it) of another HP3466A, I think I could end going for all for all my bench meters to be HP ones, I really like their gear its awesome. Can't quite believe how little it went for, £31.50. Ebay is most certainly picking up again. Now I need to think about what meter(s) am I going to part with to enable these new ones to sit in my stack? I know it goes against the grain of TEA but I cannot have them all, house isn't big enough and SWMBO would make me sleep in the garage.  :-DD
Who let Murphy in?
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10062 on: May 01, 2018, 01:34:51 am »
Nice one  :-+

That's a good price.
 

Online Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10063 on: May 01, 2018, 01:40:46 am »

Hope I'm not violating any rules by posting lots of biggish pictures (I do scale them down to 50 % however).
If you're offended by this, please let me know.

Now if you take a closer look at the labels above the switches on the front, you'll probably see why I just had to have this baby.  :-+

Ero-Shan, whose mood lightened up considerably during the last hours.

I don't think your breaking any rules with the size of your photos, what the point of posting thumbnails of all that lovely colourful porn, impact and detail is lost then. I'll be posting some of my own soon  :-DD
Who let Murphy in?
 

Offline Ero-Shan

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10064 on: May 01, 2018, 03:02:00 am »
I tried very hard to ignore it 8) but I couldn't help myself, I'm now the proud owner (at least till I see it) of another HP3466A, I think I could end going for all for all my bench meters to be HP ones, I really like their gear its awesome. Can't quite believe how little it went for, £31.50. Ebay is most certainly picking up again. Now I need to think about what meter(s) am I going to part with to enable these new ones to sit in my stack? I know it goes against the grain of TEA but I cannot have them all, house isn't big enough and SWMBO would make me sleep in the garage.  :-DD
Don't you dare throwing your PM2521 out! It served you well all the time, so it deserved to stay in it's accustomed place during it's final years. :'(
 

Offline Ero-Shan

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10065 on: May 01, 2018, 03:09:25 am »
Ero-Shan, that is gorgeous! Would that, then, be a VTDMM?

VTDMM? Nice idea! But those tubes have no vacuum inside, just neon at a low pressure.

I've now powered it up. There's some random counting until it stops at 03.34 (or thereabouts). No change whatever switch is actuated (apart from the mains switch, which will effectively make the display all dark  >:D).
The thorough manual and pretty schematics hopefully help me fixing it. I'm still hopeful. Tomorrow looks like a good day for going at it.
 
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Online Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10066 on: May 01, 2018, 03:13:17 am »
Signal Generator comes back home to Essex, some before and after photos and some shots of the amazing detail inside. This thing even has 2 screening cans, 1 inside the other and works perfectly, no adjustments needed, the frequency on the dial is bang on when checked with my TF930, I'll post a couple shots later of that.


Before


Those knobs were actually grey after all. As you can see there is what looks like a varnish run ending in tear drop on the left of the front. Anyone have any ideas on how I remove this without damaging the rest of the front?


Screening can 1 which has another slightly smaller one beneath it (thought I took a photo of it but no, I didn't).


Whats under the screening cans


Whats outside the can.

A few more to follow later.



Who let Murphy in?
 

Online Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10067 on: May 01, 2018, 03:15:31 am »
Ero-Shan, that is gorgeous! Would that, then, be a VTDMM?

VTDMM? Nice idea! But those tubes have no vacuum inside, just neon at a low pressure.

I've now powered it up. There's some random counting until it stops at 03.34 (or thereabouts). No change whatever switch is actuated (apart from the mains switch, which will effectively make the display all dark  >:D).
The thorough manual and pretty schematics hopefully help me fixing it. I'm still hopeful. Tomorrow looks like a good day for going at it.

Oh dear, I hope its not terminal like my poor Philips PM2521 that only wants to display 2.0000 all the time  :-DD
Who let Murphy in?
 

Online GreyWoolfe

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10068 on: May 01, 2018, 03:34:19 am »
I tried very hard to ignore it 8) but I couldn't help myself, I'm now the proud owner (at least till I see it) of another HP3466A, I think I could end going for all for all my bench meters to be HP ones, I really like their gear its awesome. Can't quite believe how little it went for, £31.50. Ebay is most certainly picking up again. Now I need to think about what meter(s) am I going to part with to enable these new ones to sit in my stack? I know it goes against the grain of TEA but I cannot have them all, house isn't big enough and SWMBO would make me sleep in the garage.  :-DD

I have 2 of them and I like them, love the red display.  I scored both of mine for a total of about $80 USD or around 58 GBP.  The pushbutton switches on both needed a really good cleaning so the indicator LEDs matched the pressed function button and they are more than accurate for my needs.  As long as there is no outflow of toys from my office into the house, SWMBO leaves me alone. >:D
That which doesn't kill you still requires a co-pay.
 

Offline Ero-Shan

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10069 on: May 01, 2018, 04:13:35 am »
Ero-Shan, that is gorgeous! Would that, then, be a VTDMM?

VTDMM? Nice idea! But those tubes have no vacuum inside, just neon at a low pressure.

I've now powered it up. There's some random counting until it stops at 03.34 (or thereabouts). No change whatever switch is actuated (apart from the mains switch, which will effectively make the display all dark  >:D).
The thorough manual and pretty schematics hopefully help me fixing it. I'm still hopeful. Tomorrow looks like a good day for going at it.

Oh dear, I hope its not terminal like my poor Philips PM2521 that only wants to display 2.0000 all the time  :-DD

Me too. :) The good thing with these old machines is that they tend to be made of "normal" parts, so repairable in principle. The test gear I have should also be sufficient to do all necessary measurements. If the brain involved is up to the task, however, is a totally different question. We'll see. Ar least the Nixies and their drivers are definitely OK.

Beautiful generator you've scored!  :-+

And just don't give up on your Philips yet.  ;)
 

Online Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10070 on: May 01, 2018, 04:23:20 am »
Ero-Shan, that is gorgeous! Would that, then, be a VTDMM?

VTDMM? Nice idea! But those tubes have no vacuum inside, just neon at a low pressure.

I've now powered it up. There's some random counting until it stops at 03.34 (or thereabouts). No change whatever switch is actuated (apart from the mains switch, which will effectively make the display all dark  >:D).
The thorough manual and pretty schematics hopefully help me fixing it. I'm still hopeful. Tomorrow looks like a good day for going at it.

Oh dear, I hope its not terminal like my poor Philips PM2521 that only wants to display 2.0000 all the time  :-DD

Me too. :) The good thing with these old machines is that they tend to be made of "normal" parts, so repairable in principle. The test gear I have should also be sufficient to do all necessary measurements. If the brain involved is up to the task, however, is a totally different question. We'll see. Ar least the Nixies and their drivers are definitely OK.

Beautiful generator you've scored!  :-+

And just don't give up on your Philips yet.  ;)
I'm not giving up on the Philips, I have a soft spot for Philips and that meter in particular, it was my first 4.5 digit and for that alone, I love it. It had so much going against it when I got it but I managed to salvage it for few more months life before it finally went belly up but I live in hope of maybe making 1 out of 2 with the right donor  :-+
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10071 on: May 01, 2018, 04:33:07 am »
The interesting thing I find with Philips stuff is that they are indeed normal parts. And Philips made most of them!
 

Offline GerryBags

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10072 on: May 01, 2018, 04:37:33 am »
I'm of an age where, when I read "Phillips", I hear "phirrips - very rerriable!". 80's ads were absolutely covered in mind-glue.
 

Online Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10073 on: May 01, 2018, 04:39:10 am »
Now for something completely different, some gratuitous photos of my sig gen and TTI TF930 checking the accuracy of the dial.

The first 3 wavebands are indeed spot on as mentioned earlier but it seems the the upper 2 bands are slightly off but armed with the TF930 is not a problem. If I can locate a service manual for gene, then I can adjust it back into spec again.

10MHz.



35MHz



200Mhz



Not bad for £36.01 and it even came with the original instruction manual in pretty good condition as well, thats my third Ebay score in a week.
« Last Edit: May 01, 2018, 05:21:21 am by Specmaster »
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Online BravoV

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #10074 on: May 01, 2018, 04:39:47 am »
Has anyone have spare & cheap  :P -> HP 1143A (Probe Offset Control and Power Module) to spare ?


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