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Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 219833 times)

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Offline bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2900 on: October 17, 2017, 06:19:54 PM »
... the knobs cleaned up nicely with a good soaking with Windex wetted paper towels.  The downside is that that usually removes the painted pointers from the knobs.  The voltage ones were pretty easy to redo, as the 'pointer' spot is recessed slightly, so a dab of paint and then a skimming with a toothpick or popsicle stick will clean the excess nicely.  The one used for the meter range switch, on the other hand...  Its pointer is slightly raised, and it was a battle to get the paint on it and clean the excess off under the microscope using toothpick.  I've had good success with that kind of knob in the past, but last night just didn't have the touch - it took about three or four tries, and I'm still not completely happy with it.

Wow, I'd have never known had you not said anything. It turned out great — worth the effort.

Quote
A close look showed that the badges are just glued in place, and the two holes are only for some little alignment nubs, not retaining posts as I'd originally thought (but never bothered to actually check)...

Heh, I never bothered to check before, either. Well, that does explain all the missing ones.

Quote
There's also a 6024A in the queue ... but the voltage meter, she no work.  I plan to take the meter apart in an effort to free it up; failing that I suppose I could put a digital readout in there.  I'd like to keep it as original as possible, though, as it's a 200W supply and the current capabilities drop off as the voltage goes up, and the current limits vs voltage are shown on the meter (and the V vs I ones are shown on the ammeter).

HP certainly did a lot of creative things to make good, reliable power supplies, didn't they?

Yeah, I like the supplies in that series because of the meters. It was really neat the way they put the available voltage markings on the current meter and vice versa. I've seen it done on some non-HP gear, but it's rather rare. If you do have to go digital, then do the segmented LED as that's what the successors to those supplies had, IIRC.
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Online Cubdriver

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2901 on: October 17, 2017, 06:20:52 PM »
Those are ridiculously nice power supplies in that series. I had a couple of them many years ago and am constantly on the lookout for some on eBay but they hardly ever show up in Europe.

Got me an Hp 6215A a while ago but it was smashed to bits in the post :(

 |O :palm:

That sucks.  Was it at all salvageable?  (I have one like that too - a 3-D puzzle for some day when I'm bored and feel like playing with glue.  They're nice little supplies, but the enclosures have become somewhat brittle over the years, and they don't appreciate being smashed about.)

I wish shippers would realize that what they're shipping is going to get tossed about like a football while it's in transit, and package it appropriately!  Stuffing something relatively heavy in a box with some crumpled newspaper does NOT qualify as adequate packing.   ::)

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

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2902 on: October 17, 2017, 06:34:09 PM »
Unfortunately not. The case was smashed, the meter smashed and the neon disintegrated. It had one layer of bubble wrap around it. If it had a few more it'd be fine. The plastic gets quite brittle but brittle enough to disintegrate to that level if it was well packed.

Then the seller started to be a dick, so I just claimed it.
 

Online Cubdriver

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2903 on: October 17, 2017, 06:49:56 PM »
Unfortunately not. The case was smashed, the meter smashed and the neon disintegrated. It had one layer of bubble wrap around it. If it had a few more it'd be fine. The plastic gets quite brittle but brittle enough to disintegrate to that level if it was well packed.

Then the seller started to be a dick, so I just claimed it.

Bummer.  :palm:  I hate packaging morons.
 
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If it jams, force it.  If it breaks, you needed a new one anyway...
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2904 on: October 17, 2017, 07:00:43 PM »
Me too. I’m a feedback bastard though. Bad packaging and it survives, neutral feedback. Bad packaging and it doesn’t, negative feedback.

If it’s a small value item I won’t bother to claim because the claims process allows the sellers reputation to remain intact if they refund. They could sent a hundred things out that were destroyed and still get 100% positive feedback.

I’ve sent 290 items as a seller.  Not one return and none damaged in transit! It’s not hard. Unless you’re an idiot and idiots don’t deserve a good feedback outcome otherwise what’s the point. Oh filling ebays pockets is the point! :(

Edit: perhaps I should set up an independent site for TEA :)
« Last Edit: October 17, 2017, 07:05:39 PM by bd139 »
 

Offline bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2905 on: October 17, 2017, 07:10:43 PM »
I’ve sent 290 items as a seller.  Not one return and none damaged in transit! It’s not hard.

Agreed. I've shipped all kinds of things including those hefty "portable" HP spectrum analyzers (cross-country no less) without a mishap.

Quote
Edit: perhaps I should set up an independent site for TEA :)

Hehe. It would be nice to have sub-threads for TEA. As the membership grows, there's more variety to the discussions.
It's TEA time! You know you want some.
 

Online Cubdriver

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2906 on: October 17, 2017, 07:20:43 PM »
I ship 60-100+ pound boxes home from my swap meet/surplus place forays during my California visits, and knock on wood the stuff has survived the journey so far.  Carefully packing things so that they're immobilized within the box seems to work quite well.  (Now watch my next shipment get run over by a forklift.)

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

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2907 on: October 17, 2017, 07:27:29 PM »
Hehe. It would be nice to have sub-threads for TEA. As the membership grows, there's more variety to the discussions.

I was thinking more of TEAbay i.e. ebay without the fees :)
 

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2908 on: October 17, 2017, 07:49:06 PM »
Hehe. It would be nice to have sub-threads for TEA. As the membership grows, there's more variety to the discussions.

I was thinking more of TEAbay i.e. ebay without the fees :)

That would imply sellers.  We all suffer from GAS, and while some may occasionally sell something, most are in acquisition mode the majority of the time.  Doesn't strike me as particularly viable.   :P

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

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2909 on: October 17, 2017, 07:56:54 PM »
That's a good point!

Well that idea went down in flames pretty quick :D
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2910 on: October 17, 2017, 08:18:24 PM »
That's a good point!

Well that idea went down in flames pretty quick :D
I also have not a single return or damage report but I've received plenty of damage items where the packaging was inadequate including a scope with handle and foot smashed to bits and casing badly dented.

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Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2911 on: October 17, 2017, 11:55:59 PM »
A quick-and-dirty load test (a power resistor I scrounged, but not a particularly high power or low resistance enough one for a good test; I need to dig some more for one better suited) showed no visible ripple on the output when monitored on a scope.

When I replace car batteries I keep the old ones on a minimum maintenance cycle. They make a good load for sinking several amps for several hours, much more civilized than making a bunch of power resistors get hot.
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Offline khs

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2912 on: October 18, 2017, 07:12:00 AM »
Here two of my four 628xA. It looks a company named Andrew was the first owner of this 6284A.

The 6284A came from Harrison (Harrison was acquired by HP). My Andrew-Harrison 6284 came from the US, very well packaged - in a huge box. Shipped by UPS to Germany.

The price for the UPS shipment depends on the size of the package. If I'm not wrong, the shipment costs of this very well packaged power supply was about 400 euros. So it was a quite expensive power supply. But in the package was a not too expensive 11A16, 11A32 and a 11A33 too, so over all it was lot cheaper than in Germany - including shipment. 

But back to the 628x. Real impressive is the accuracy and the linearity of the meters when calibrated. When the pointer in over the 12V (or any other) bar, you can be sure, the output voltage is quite accurate.

In many cases the accuracy in the lower ranges of some meters is quite poor. 
 

Online Cubdriver

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2913 on: October 18, 2017, 07:28:44 AM »
That's the logo of the Andrew Radio Corporation, the company that introduced HELIAX coaxial cable in 1953.

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

Offline bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2914 on: October 18, 2017, 07:41:52 AM »
Ah, you can also clearly see the color change in the face plate in khs' photos going from Harrison/HP to HP.

Pat, your supply doesn't carry the Harrison name with the HP logo. So, does yours have a tan face plate? I wasn't completely sure from the photos.
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Offline khs

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2915 on: October 18, 2017, 07:56:21 AM »
Here from the side. It looks HP used 'old' housing parts for new units.
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2916 on: October 18, 2017, 07:56:56 AM »
Excellent supplies!  :-+

If anyone knows anyone reselling these sorts of supplies off ebay in the EU, please let me know. I have been after one for an age. It's either that or I have to buy a shitty Korad or something which will blow up after 6 months and I'm not sure I'm up for that yet.
 

Online BU508A

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2917 on: October 18, 2017, 08:27:09 AM »
Excellent supplies!  :-+

If anyone knows anyone reselling these sorts of supplies off ebay in the EU, please let me know. I have been after one for an age. It's either that or I have to buy a shitty Korad or something which will blow up after 6 months and I'm not sure I'm up for that yet.

Perhaps you want to have a look at these sites:

http://www.rainer-foertig.de/Netzgeraete.htm
http://www.helmut-singer.de/stock/x156.html

Sorry, they are in german but maybe google translate will help.
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2918 on: October 18, 2017, 08:35:19 AM »
Perfect - thank you.

I did German at school so can get by without translate. It's quite good fun :)
 

Online BU508A

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2919 on: October 18, 2017, 08:46:49 AM »
Perfect - thank you.

I did German at school so can get by without translate. It's quite good fun :)

You are welcome.  :)

Oh, allright then. Go for it.  :-+

nice detail btw:            :D

« Last Edit: October 18, 2017, 09:04:29 AM by BU508A »
“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 

Offline Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2920 on: October 18, 2017, 08:50:34 AM »
They’re all single switches. There should be a metal release bar that disengages all the other switches in the group.
The switch arrived, looks like it do the job nicely if I just gently extract the little jumper bar on top. I'll be fitting that tomorrow, thanks for the pointers  :-+
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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2921 on: October 18, 2017, 01:59:18 PM »
My 'new' Rubidium standard has been running for most of the day, powered by the recently cleaned up HP 6289A power supply.  The power supply seems quite content putting out 24V @ about 0.6A; things are pleasantly warm to the touch.  Looking at the standard prompted me to drag a few of the previously untested counters off the 'to be cleaned and gone through' shelf, and considering that they're all well past the drinking age and have been stored and operated in who knows what conditions, they're proving to be pretty damned accurate in my opinion.

A 5327B is reading 4-5 Hz low @ 15 MHz in, and the 5325B that came from Apex in CA a few years ago is reading 10-20 Hz high at 10 MHz (the tens digit is its finest resolution at that frequency).  I'm also using the voltmeter function on a 5326B to monitor the power supply voltage.  I have quite the pile of long-in-the-tooth boxes on the bench today!


Frequency Standard:



Test setup:



Waveshape on scope (fed into 50 ohm feedthrough termination):


Now to find the time to wring out and clean up the counters!

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

Offline neo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2922 on: October 18, 2017, 02:09:35 PM »
I appear to have a cat problem, before i delve into the intricacies of that let me first mention my soldering iron is exactly where i want it on my bench.

Where my soldering iron sits the cord hangs off the edge of the desk, i like it that way the cord comes freely out when pulled, gravity withdraws it and i don't even have to reach for the iron as it is at my fingertips.
The problem comes in the form of cats because the second i leave my bench they yank the stand off and no matter what i do they don't stop. One of my cats stopped bothering my workbench altogether when it got whacked in the head by the stand but the main one to do it is far too stupid for that to work.
Any ideas on how to deal with a cat that can learn neither from a carrot or the stick?

I have three options, get through to the cat that my workbench is forbidden ( :-DD |O :horse:);
coil it up which i never think of and consider to be a bane of my existence to be forced to do;
or i let them break the thing by pulling it off.

So this post isn't entirely about the stupidity of cats, i have been wondering whether or not the oscilloscope i bought will require a special probe or will any probe do?
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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2923 on: October 18, 2017, 02:33:29 PM »
Get you one of these:



And I mean one of the Zep Pro bottles; nothing else even comes close. They cost about $5 with shipping from places like White Cap : https://www.whitecap.com/shop/wc/p/zep-professional-sprayer-hdpro36

You'll want to put a plastic sheet over your gear unless you have unbelievable self-restraint and know you can keep from spraying until they're out of the line of fire; these are no ordinary spray bottle. They are designed so that you can put the full force of at least 3 fingers on the trigger and still have good accuracy; this means you can either deluge him or if your aim is good, give him an enema from halfway across the room.

I have YET to see the cat which didn't learn their lesson when taught by Professor Zep.  ;)


Good hunting,


mnem
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Online djos

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #2924 on: October 18, 2017, 02:38:57 PM »
I appear to have a cat problem, before i delve into the intricacies of that let me first mention my soldering iron is exactly where i want it on my bench.

Where my soldering iron sits the cord hangs off the edge of the desk, i like it that way the cord comes freely out when pulled, gravity withdraws it and i don't even have to reach for the iron as it is at my fingertips.
The problem comes in the form of cats because the second i leave my bench they yank the stand off and no matter what i do they don't stop. One of my cats stopped bothering my workbench altogether when it got whacked in the head by the stand but the main one to do it is far too stupid for that to work.
Any ideas on how to deal with a cat that can learn neither from a carrot or the stick?

I have three options, get through to the cat that my workbench is forbidden ( :-DD |O :horse:);
coil it up which i never think of and consider to be a bane of my existence to be forced to do;
or i let them break the thing by pulling it off.

So this post isn't entirely about the stupidity of cats, i have been wondering whether or not the oscilloscope i bought will require a special probe or will any probe do?

For training cats to stay away from things, nothing beats a motion activated blast of compressed air to discourage kitty from visiting certain areas - they learn real quick I can tell you!!!  :-DD

https://www.amazon.com/Contech-StayAway-Motion-Activated-Pet-Deterrent/dp/B000DZFFN4/



there's a few different variants around, all use the same idea:

http://www.ebay.co.uk/itm/Petsafe-SSSCAT-Spray-Deterrent-Cat-Dog-Repellent-MOTION-ACTIVATED-Training-Kit-/171105466409

« Last Edit: October 18, 2017, 02:42:20 PM by djos »
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