Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 4027298 times)

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Online drussell

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65000 on: July 31, 2020, 04:35:47 am »
Page 2600 already? Sheesh! 2500 wasn't that long ago.

Does that mean that we have to discuss old style 'colour box' 'phone system hacking?



mnem
Cap'n Crunk, yo.

Whistling "blue box" at 2600 wasn't exactly difficult, even without Capt'n Crunch...  :)

I used to be able to trick the payphones out at the lake into making calls as if you'd dropped a coin in, but I can't remember exactly what I did... It's so long ago now... 

I do vaguely recall that on one really early model payphone at the campground for a few years, you could just insert the DTMF tones even without a coin and it just worked... 

My dad bought one of those Radio Shack TAD-150 (43-248) answering machines in, what '81?, maybe 82?... something like that...  You could program the remote with the DTMF tones for your "home" number so it would auto-dial, (then do the FSK to log in to the answering machine with your code, be able to fast forward, rewind, delete, etc.) so essentially that just worked a lot of time time, essentially as a "replay attack", even without a coin, IIRC...



Ahhh... good times...  :)   :-DD
 

Online mansaxel

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65001 on: July 31, 2020, 08:00:35 am »
...
(which becomes PostMord in Sweden)

Seriously, it is actually called PostMord?    LOL...  :palm:

Oh my, phonetically that translates very poorly, yet probably accurately (or is it actually supposed to be an N?...)   :-DD

+1, Sweden, +1...   :)


No, it is "PostNord" (what happens when you join the Swedish and Danish Royal Mail authorities and mismanage them as one company) but their habit of being about the worst of all parcel carriers in Sweden has earned them that name, especially so since they used to be a very significant part of the communication between Government and People; they were trusted, ran a bank, were very dependable, and had offices everywhere. Now, a post office is nowhere to be found, except "service centers" in industrial areas. They instead hand out registered mail and packages via representatives that usually are supermarkets, which nowadays works quite well.

Online BU508A

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65002 on: July 31, 2020, 08:15:19 am »
Digging out an old project again. I’m sorting out the scope screensaver again ie the bouncing ball:

https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/msg1931791/#msg1931791

Have redesigned it with better play field constraints, much less crap triangle generators, it now works off a couple of 9v batteries rather than 15v supplies  and has a quadrature oscillator that doesn’t require as much feedback futzing. I will build a prototype at the weekend. If it works I will do a PCB for this one.

I’m designing out some of the complexity at the same time so it will need only a few resistor values, lm358 opamps and some film caps, a couple of signal diodes and nothing else. Cheap and easy.  Should be able to throw it together for less than $15 including PCB

LT1097CN8:
https://www.ebay.co.uk/itm/310769062346

Edit:
On the other hand, I have here a lot of MC1741U from Motorola Korea in this nice ceramic DIP.
Do you think they will work as well?

Edit 2:
https://www.ebay.de/itm/96-Stk-Motorola-MC1741U-Korea-KKCQ-403-C-Dip-Antistatic/164151606111

Got them for 140,- Euro, so there is room for negotiations. :)
« Last Edit: July 31, 2020, 08:27:30 am by BU508A »
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65003 on: July 31, 2020, 08:19:56 am »
Those are too expensive and to be honest way too good opamps for this job.

Edit: annoyed. Got a lot of shit to sell and eBay have switched their deal to 5% max sellers fees rather than £1 max seller fees for me. That means I am getting screwed on high value items  :--. Might not sell anything this time and see what happens in 2 weeks.
 

Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65004 on: July 31, 2020, 08:26:36 am »
Those are too expensive and to be honest way too good opamps for this job.

Edit: annoyed. Got a lot of shit to sell and eBay have switched their deal to 5% max sellers fees rather than £1 max seller fees for me. That means I am getting screwed on high value items  :--. Might not sell anything this time and see what happens in 2 weeks.

Wait until the next bank holiday; that seems to be when the £1max occurs.

Sell in May and go away; come back in September.
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 #65005 on: July 31, 2020, 08:27:55 am »
Makes sense. Also captive and desperate audience to gouge at the moment

Edit: actually I think it's more complicated than that. Someone at work has the £1 listing offer and has sent it to me and it's "invite only" apparently according to the large red error I get activating it. Perhaps I screwed them out of too much profit this year  :-DD
« Last Edit: July 31, 2020, 08:34:01 am by bd139 »
 

Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65006 on: July 31, 2020, 08:44:44 am »
Gee, look at this. They even come in Tek blue.  :-+ But the prices are on the ridiculous side. Come on.....$30 for a t-shirt?  ::)

I think I'll pass.

https://moteefe.com/Old-Tek-Scopes?color=jet-black&fbclid=IwAR3uQyJzUSfILlxjp6stAtOkMk7rm4B0HzE0ATnTU5s7MTe24FMNnv-6Hy8&product=unisex-hoodie
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Online Zucca

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65007 on: July 31, 2020, 08:49:11 am »
This month the HP cup, next month in August (...  :P) the Tek hoodie.
In Semptember I want and need a proper TEA underwear, any suggestions?
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Can't love what you don't know. Zucca
 
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65008 on: July 31, 2020, 08:54:53 am »
Dealing with old kit, just buy something brown for down there so it doesn't show the stains when it blows up in your face :-DD
 
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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65009 on: July 31, 2020, 08:58:03 am »
I heard somewhere that Hermes has skivvies with their embossed logo.  :-DD :-DD
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Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65010 on: July 31, 2020, 09:05:04 am »
Makes sense. Also captive and desperate audience to gouge at the moment

Edit: actually I think it's more complicated than that. Someone at work has the £1 listing offer and has sent it to me and it's "invite only" apparently according to the large red error I get activating it. Perhaps I screwed them out of too much profit this year  :-DD

I suspect it is simpler than that. If you have merely taken up the £1 offer, they will try to get you to take up a less attractive offer.

I've just had my second 5% offer, which I will again ignore.
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
 
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65011 on: July 31, 2020, 09:07:15 am »
I will ignore it :)
 

Offline tonyalbus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65012 on: July 31, 2020, 09:07:36 am »
What you guys use in your ultrasonic cleaner, i read about RW77 fluid.. what do you use?

for pcb's

juwalry is just water and soap...
Electronics enthusiast, TEA and Radio Amateur (PE1ONS)
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Offline tggzzz

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65013 on: July 31, 2020, 09:07:59 am »
I heard somewhere that Hermes has skivvies with their embossed logo.  :-DD :-DD

I think embossing a skivvy would be illegal, nowadays :)
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 BU508A

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65014 on: July 31, 2020, 09:15:00 am »
This month the HP cup, next month in August (...  :P) the Tek hoodie.
In Semptember I want and need a proper TEA underwear, any suggestions?

https://www.hottopic.com/product/doctor-who-tardis-schematic-boxer-briefs/10349919.html



“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 
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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65015 on: July 31, 2020, 09:18:27 am »
What you guys use in your ultrasonic cleaner, i read about RW77 fluid.. what do you use?

for pcb's

juwalry is just water and soap...

I'll test this (not done yet) but this was recommended for my ultrasonic cleaner. So I ordered one bottle.

https://www.voelkner.de/products/102649/Emag-EM303-Reinigungskonzentrat-Platinen-500ml.html

“Chaos is found in greatest abundance wherever order is being sought. It always defeats order, because it is better organized.”            - Terry Pratchett -
 

Offline tonyalbus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65016 on: July 31, 2020, 09:26:43 am »
What you guys use in your ultrasonic cleaner, i read about RW77 fluid.. what do you use?

for pcb's

juwalry is just water and soap...

I'll test this (not done yet) but this was recommended for my ultrasonic cleaner. So I ordered one bottle.

https://www.voelkner.de/products/102649/Emag-EM303-Reinigungskonzentrat-Platinen-500ml.html



Danke!

i was looking for this.. rw77 seems a bit strong

love to hear your results!
Electronics enthusiast, TEA and Radio Amateur (PE1ONS)
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Offline med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65017 on: July 31, 2020, 10:13:35 am »
Goodie box from Sphere came today...pics later. I got a really pristine Tek 191, the transistors I need to repair my second HP 3444A plugin, and the usual Sphere bag of extra goodies. :D

And here it is. The 191 works great. Recently calibrated, and looks exceptionally clean outside and in.

Here's my three. One of these days I suppose I'll spring for a Type 184. But after reading the frustrations You and Worsthorse had with the high frequency circuits I'm not sure I want that aggravation.  :-//



Here's the difference between repaint (2 left) and original. Next to each other you can tell the difference. Apart you'd be hard pressed to know it's not original.

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65018 on: July 31, 2020, 10:18:45 am »
Goodie box from Sphere came today...pics later. I got a really pristine Tek 191, the transistors I need to repair my second HP 3444A plugin, and the usual Sphere bag of extra goodies. :D

And here it is. The 191 works great. Recently calibrated, and looks exceptionally clean outside and in.

Here's my three. One of these days I suppose I'll spring for a Type 184. But after reading the frustrations You and Worsthorse had with the high frequency circuits I'm not sure I want that aggravation.  :-//



Here's the difference between repaint (2 left) and original. Next to each other you can tell the difference. Apart you'd be hard pressed to know it's not original.



Nice Job!
Electronics enthusiast, TEA and Radio Amateur (PE1ONS)
Marconi  - TTi - Thandar - Thurmbly - HP - Fluke - Philips - Siglent - Owon - TEK - Anritsu - Keitley - AVO - BG7TBL
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65019 on: July 31, 2020, 10:23:09 am »
Excellent job indeed. Nice to see  :-+

UPS tracking is borked today when I have a UPS possibly turning up  >:(
 
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Offline TERRA Operative

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65020 on: July 31, 2020, 11:46:04 am »
This month the HP cup, next month in August (...  :P) the Tek hoodie.
In Semptember I want and need a proper TEA underwear, any suggestions?

https://www.hottopic.com/product/doctor-who-tardis-schematic-boxer-briefs/10349919.html



It's bigger on the inside than the outside.

Ladies.....  8)
Any circuit design must contain at least one part which is obsolete, two parts which are unobtainable, and three parts which are still under development.

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65021 on: July 31, 2020, 12:00:32 pm »
This corona thing has people selling gear like it's on fire, and no-one buying.... Good for me!

Latest score just this moment, for 15000yen (US$140-ish), and looks pretty clean.

I'm having a bit of a feeding frenzy at the moment, all the Tek TM500 modules are popping up recently. Got my eye on a few others ending this weekend.
Any circuit design must contain at least one part which is obsolete, two parts which are unobtainable, and three parts which are still under development.

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Online BU508A

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65022 on: July 31, 2020, 12:29:19 pm »
@TERRA Operative:
You are buying all this stuff on Yahoo! Japan, right?
« Last Edit: July 31, 2020, 01:18:43 pm by BU508A »
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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65023 on: July 31, 2020, 01:12:58 pm »
all the Tek TM500 modules are popping up recently.

I've got that oscillator too. It's a really smooth device, and its tone is very, very good, plus I like that it's got a balanced output.  In the same frame it is paired to a very sick distorsion analyser, an AA501A, but I'm suspecting its no more than aging pains.

What's the trick to get a module out of the frame if the handle is broken?

Edit: Found this thread and subsequently ordered a cable...
« Last Edit: July 31, 2020, 01:31:13 pm by mansaxel »
 
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Offline TERRA Operative

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #65024 on: July 31, 2020, 02:00:17 pm »
@TERRA Operative:
You are buying all this stuff on Yahoo! Japan, right?

Yep, practically all the old gear I buy online is from there. A little is bought in Akihabara but mostly Yahoo! Auctions.


all the Tek TM500 modules are popping up recently.

I've got that oscillator too. It's a really smooth device, and its tone is very, very good, plus I like that it's got a balanced output.  In the same frame it is paired to a very sick distorsion analyser, an AA501A, but I'm suspecting its no more than aging pains.

What's the trick to get a module out of the frame if the handle is broken?

Edit: Found this thread and subsequently ordered a cable...


Oh cool, good to hear I picked a good one. :D
I'm not sure about removing modules with broken tabs, Maybe a bit of superglue on a toothpick to adhere to the broken stub to pull on the mechanism might get it free.
A little inward pressure while pulling the tab to reduce the force on the mechanism might help to release it too.


I'm currently designing my own plugin extender harness. Teaser pics below.
I didn't like the other designs I've seen where you have to reach into the enclosure to plug in, so I made the card larger with a handle shape for ease of use. It'll also get 3D printed guides attached to allow it to slide on the rails and align perfectly and easily.
« Last Edit: July 31, 2020, 02:16:22 pm by TERRA Operative »
Any circuit design must contain at least one part which is obsolete, two parts which are unobtainable, and three parts which are still under development.

https://www.youtube.com/user/NearFarMedia/
 
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