Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 3484959 times)

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Offline tonyalbus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62675 on: July 07, 2020, 11:55:28 am »
[attachimg=1]

PSU deal arrived.... lets do some flipping..


[attachimg=2]
[attachimg=3]

This one is a keeper, needs lots of TLC   :-/O
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62676 on: July 07, 2020, 11:57:33 am »
Those Farnell E series supplies are pretty nice and very small. I did a refurb on one a couple of years ago. Will see if I can dig out the post
 
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Offline tonyalbus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62677 on: July 07, 2020, 12:05:10 pm »
Those Farnell E series supplies are pretty nice and very small. I did a refurb on one a couple of years ago. Will see if I can dig out the post

This is a ET30/2 , yes thanks if you can find. :-+
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62678 on: July 07, 2020, 12:06:56 pm »
It's spread all over the place so I will consolidate it all. Three notes:

1. There's a RIFA hiding in it. Usually across the output terminals. This is not the end of the world scenario but it needs removing on principle.
2. Also there is no reverse protection diode across the output or across the pass transistor so if you're using it to drive something which can shove current back into the supply (capacitors, batteries) it'll blow the shit out of the pass transistors if the line supply fails or is switched off by someone using the vacuum cleaner :-DD. Stuff a fat diode across the output and the pass transistors.
3. The push switches get a bit dicky. They are unobtainium so you will have to get creative with mounting a toggle switch or something alternative. Plus there is mains on the main board so be careful.

Action shot:



Inside. Whole thing breaks in half in the middle with an edge connector.



Front panel with new RIFA replacement, new output cap and additional diode:



Pass transistor diode (on rear heatsink)



I rather like 'em when they're working.

Yours might be a later one with some of the issues fixed. There were about 5-6 revisions.

Edit: oh watch out for the voltage reference diode and resistor. They run hot! Burned myself on the bugger.
« Last Edit: July 07, 2020, 12:09:13 pm by bd139 »
 
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Offline tonyalbus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62679 on: July 07, 2020, 01:05:45 pm »
It's spread all over the place so I will consolidate it all. Three notes:

1. There's a RIFA hiding in it. Usually across the output terminals. This is not the end of the world scenario but it needs removing on principle.
2. Also there is no reverse protection diode across the output or across the pass transistor so if you're using it to drive something which can shove current back into the supply (capacitors, batteries) it'll blow the shit out of the pass transistors if the line supply fails or is switched off by someone using the vacuum cleaner :-DD. Stuff a fat diode across the output and the pass transistors.
3. The push switches get a bit dicky. They are unobtainium so you will have to get creative with mounting a toggle switch or something alternative. Plus there is mains on the main board so be careful.

Action shot:



Inside. Whole thing breaks in half in the middle with an edge connector.



Front panel with new RIFA replacement, new output cap and additional diode:



Pass transistor diode (on rear heatsink)



I rather like 'em when they're working.

Yours might be a later one with some of the issues fixed. There were about 5-6 revisions.

Edit: oh watch out for the voltage reference diode and resistor. They run hot! Burned myself on the bugger.

Thanks!!!
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Online Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62680 on: July 07, 2020, 01:10:12 pm »


PSU deal arrived.... lets do some flipping..


Are you quite sure that you've got enough of 'em Tony?  :)
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 

Offline tonyalbus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62681 on: July 07, 2020, 01:21:30 pm »


PSU deal arrived.... lets do some flipping..


Are you quite sure that you've got enough of 'em Tony?  :)

Needed two and maybe a spare... trying to prevent to use switched ones for some applications..
but the saller gave free shipping and very nice prize if i buy all, so i did  :palm:
i am sure more HAMs like these becouse of switching PSU give QRM on HF..
Will sell most of then.. i think  :-DD
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62682 on: July 07, 2020, 01:23:14 pm »
They will sell really well. I've seen them go for £20 over the usual retail price at hamfests here  :-DD
 
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Offline FransW

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62683 on: July 07, 2020, 01:33:34 pm »

Needed two and maybe a spare... trying to prevent to use switched ones for some applications..
but the saller gave free shipping and very nice prize if i buy all, so i did  :palm:
i am sure more HAMs like these becouse of switching PSU give QRM on HF..
Will sell most of then.. i think  :-DD

My ham equipment now runs for approx 5 years on HP (common slot, Delta) gold ex-server smps's (460 - 1200W) without ANY hf interference. Highly recommended. Efficiency over 94%!
I bought them for Euro 7,50.

Frans
« Last Edit: July 07, 2020, 01:36:14 pm by FransW »
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Offline FransW

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62684 on: July 07, 2020, 02:30:30 pm »
Example 2x1200W in original server housing.
2400W, 94%, €15.=, auto-cooling and small.
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Offline SilverSolder

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62685 on: July 07, 2020, 02:35:40 pm »
Example 2x1200W in original server housing.
2400W, 94%, €15.=, auto-cooling and small.

What voltages do you get the 1200W at -  is it mostly available at 12V ?

 

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62686 on: July 07, 2020, 02:51:26 pm »
   Some of us will feel a little satisfaction that this is still up for sale :)

https://www.ebay.co.uk/itm/AVO-multimeter-with-Broad-Arrow-working-lamp/153997147802   And if it acts as a trigger point for others, then I say sorry heh heh heh <sound of Muttley sniggering>.   

Yebbut... how many copies has the guy already sold on Etsy...?   >:D

mnem
 
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Offline FransW

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62687 on: July 07, 2020, 02:52:32 pm »
The older versions are adjustable fro. around 11.5 to 13.4V.
The newer versions adjustability is less due to the efficiency requirements.
However, it is quite possible to change the internal settings but max power
is limited to the component selection (test criteria).
However, with 2400W available it becomes difficult to wisely use more power.
So it is wise to first know exactly what you are doing before disaster strikes.

They are beauties in terms of stability, noise, cooling and space usage.
And again, no HF, VHF & SHF interference.
My most used ones are the 460W versions.
Parallel and serial usage possible by floating earth mods.
Other uses: Lipo charging, mining equipment, etc.

Frans
« Last Edit: July 07, 2020, 02:54:11 pm by FransW »
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Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62688 on: July 07, 2020, 03:34:13 pm »
   PSU deal arrived.... lets do some flipping..   

Are you quite sure that you've got enough of 'em Tony?  :)

Needed two and maybe a spare... trying to prevent to use switched ones for some applications... but the seller gave free shipping and very nice price if i buy all, so i did  :palm:   i am sure more HAMs like these becouse of switching PSU give QRM on HF.. Will sell most of then.. i think  :-DD

   I had about 30 pieces of similar TrippLite 13.8V/3A that were sitewide pulls from a network.

Flipped them quick for average ~$30 each; you know the drill: start out at $40, then by the time you've saturated the market you're blowing them out at $20 each...  :-DD

mnem
 :bullshit:
« Last Edit: July 07, 2020, 03:37:32 pm by mnementh »
 
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62689 on: July 07, 2020, 03:36:33 pm »
You have to trickle them out slowly even if it takes years if you don't want to saturate the market. Think it took me about 4 years to sell a box of germanium transistors. Fortunately slap bang in the middle of "peak pedal nonsense"  :-DD. That's why I got fat that box of transistors  :-DD
 
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Offline tonyalbus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62690 on: July 07, 2020, 03:39:22 pm »
   PSU deal arrived.... lets do some flipping..   

Are you quite sure that you've got enough of 'em Tony?  :)

Needed two and maybe a spare... trying to prevent to use switched ones for some applications... but the seller gave free shipping and very nice price if i buy all, so i did  :palm:   i am sure more HAMs like these becouse of switching PSU give QRM on HF.. Will sell most of then.. i think  :-DD

   I had about 30 pieces of similar TrippLite 13.8V/3A that were sitewide pulls from a network.

Flipped them quick for average ~$30 each; you know the drill: start out at $40, then by the time you've saturated the market you're blowing them out at $20 each...  :-DD

mnem
 :bullshit:

Thats the plan ;)
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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62691 on: July 07, 2020, 03:41:20 pm »
   PSU deal arrived.... lets do some flipping..   

Are you quite sure that you've got enough of 'em Tony?  :)

Needed two and maybe a spare... trying to prevent to use switched ones for some applications... but the seller gave free shipping and very nice price if i buy all, so i did  :palm:   i am sure more HAMs like these becouse of switching PSU give QRM on HF.. Will sell most of then.. i think  :-DD


   I had about 30 pieces of similar TrippLite 13.8V/3A that were sitewide pulls from a network.

Flipped them quick for average ~$30 each; you know the drill: start out at $40, then by the time you've saturated the market you're blowing them out at $20 each...  :-DD

mnem
 :bullshit:

Those 2 bigone look cool!
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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62692 on: July 07, 2020, 03:47:43 pm »
You have to trickle them out slowly even if it takes years if you don't want to saturate the market. Think it took me about 4 years to sell a box of germanium transistors. Fortunately slap bang in the middle of "peak pedal nonsense"  :-DD. That's why I got fat that box of transistors  :-DD

   THIS!!!


Yeah... you remember that pic of a hallway wall with about 20 linear feet of stacked oscilloscopes we all gabbled about a year or two back...? That's what I had with these PSUs in the front hallway (so I could get to them and send them out; my office looked like this at the time) for about 5-6 weeks. By the time I was done, even I was sick of stubbing my toezz on the pile...  |O

mnem
 :popcorn:
 
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62693 on: July 07, 2020, 03:48:54 pm »
Hahaha. Been there. 7 teks living on the fireplace here  :-DD
 
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Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62694 on: July 07, 2020, 04:02:07 pm »

Needed two and maybe a spare... trying to prevent to use switched ones for some applications..
but the saller gave free shipping and very nice prize if i buy all, so i did  :palm:
i am sure more HAMs like these becouse of switching PSU give QRM on HF..
Will sell most of then.. i think  :-DD

My ham equipment now runs for approx 5 years on HP (common slot, Delta) gold ex-server smps's (460 - 1200W) without ANY hf interference. Highly recommended. Efficiency over 94%!
I bought them for Euro 7,50.

Frans



https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg2286147/#msg2286147

You don't say...  >:D

mnem
tzzzzzzt.
 
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Offline ArthurDent

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62695 on: July 07, 2020, 04:03:09 pm »
...meanwhile in New Hampshire, USA.
 
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Offline cyclin_al

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62696 on: July 07, 2020, 04:07:27 pm »
   PSU deal arrived.... lets do some flipping..   

Are you quite sure that you've got enough of 'em Tony?  :)

Needed two and maybe a spare... trying to prevent to use switched ones for some applications... but the seller gave free shipping and very nice price if i buy all, so i did  :palm:   i am sure more HAMs like these becouse of switching PSU give QRM on HF.. Will sell most of then.. i think  :-DD

   I had about 30 pieces of similar TrippLite 13.8V/3A that were sitewide pulls from a network.

Flipped them quick for average ~$30 each; you know the drill: start out at $40, then by the time you've saturated the market you're blowing them out at $20 each...  :-DD

mnem
 :bullshit:

Got any left, mnem? 

I am saying that I think Tony should have no trouble being able to sell these off.   :-+  I would be interested in two plus a spare, except .....
I have north american mains power, plus shipping over the pond makes it a bit too expensive.

As for bulk buying, I did the same with window screening to keep the bugs out (how timely, since we have recent photos of the darn bugs).  I bought a 500 ft roll of 8 ft wide aluminum screen, even though I only needed 32 ft of the stuff.  I sold enough to pay for the roll and still have some left; SWMBO thinks the rest is spare since it was hard to find.  Okay, it actually was hard to find.  >:D
 
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Online mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62697 on: July 07, 2020, 04:07:48 pm »
   I had about 30 pieces of similar TrippLite 13.8V/3A that were sitewide pulls from a network.

Flipped them quick for average ~$30 each; you know the drill: start out at $40, then by the time you've saturated the market you're blowing them out at $20 each...  :-DD

mnem
 :bullshit:
Those 2 big one look cool!



They're effing AWESOME!    https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg2545176/#msg2545176

mnem
*sigh*
 
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Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62698 on: July 07, 2020, 04:09:35 pm »
I still think it looks like a black and white minstrel suddenly had a good idea.

Oh, bloody hell. You're not going to cross post it to that thread. Are you?

And don't, whatever you do, look at these advertising collectibles from my (our?) youth!

OMG.....my former lady cop would go completely wacko if she saw that.  :scared: :scared:

Including those black jockey statues holding a lantern.  :o

Heh heh heh... "By the slump-ridden 30s, the Robertson’s golly was at the peak of his popularity as children collected jam-jar labels in return for golly-shaped enamel badges." FFI see https://www.campaignlive.co.uk/article/history-advertising-no-131-robertsons-controversial-brand-mascot/1345786

Even worse, from the 1958 to 1978 the top Saturday night TV entertainment was grim


I always hated it!

No, the past wasn't always better :)
« Last Edit: July 07, 2020, 04:11:29 pm by tggzzz »
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #62699 on: July 07, 2020, 04:13:54 pm »
Oh hell I'd forgotten how bad it was. Just clicked through about 20 seconds of it and I'm done  :palm:. I remember having to watch it at my grandmother's house on a tiny little tube black and white TV that smelled of a combination of death and hot cigarette tar.
 


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