Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 1714217 times)

tautech, capt bullshot, Sam Spastic, doktor pyta, BravoV, ThickPhilM, EV, URI, xrunner, mansaxel (+ 1 Hidden) and 14 Guests are viewing this topic.

Offline tggzzz

  • Super Contributor
  • ***
  • Posts: 9649
  • Country: gb
    • Having fun doing more, with less
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7400 on: February 14, 2018, 07:05:56 pm »
I would seriously be tickled pink to see such a thing [SR71] with my own eyes. ;)

Very unlikely to, now. ISTR NASA keeps one flying.

The first time I saw one it had an armed guard, and the other dripped fuel as it accelerated down the runway. I refuse to consider how many decades ago, but I do remember that the entry cost was per car - so we took 7 people in a 5 seat car, with two in the boot :)

There is an SR71 at Duxford, 10 miles south of Cambridge; you can touch it. The last time I went there was in a DC-3 :)
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 Specmaster

  • Super Contributor
  • ***
  • Posts: 7337
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7401 on: February 14, 2018, 07:11:22 pm »
Problem I found years ago living out in the countryside is that if you can see your neighbours you can usually smell the cow shit instead :)

Still thinking about that 7904 on eBay. Doesn’t power up. Thinking of low offer. Might just be duff PSU caps as it’s an early switcher.
Well you know that if you don't you'll be for ever kicking yourself and you never know, you might just get lucky and other people might be intimidated by it and give it a wide berth, go on whats the worst that can happen? :popcorn:
Who let Murphy in?
 

Offline tggzzz

  • Super Contributor
  • ***
  • Posts: 9649
  • Country: gb
    • Having fun doing more, with less
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7402 on: February 14, 2018, 07:14:10 pm »
Problem I found years ago living out in the countryside is that if you can see your neighbours you can usually smell the cow shit instead :)

Still thinking about that 7904 on eBay. Doesn’t power up. Thinking of low offer. Might just be duff PSU caps as it’s an early switcher.

In your neck of the woods, but I doubt it will end up a bargain.
https://www.ebay.co.uk/itm/TEKTRONIX-465B-Dual-Channel-100MHz-Analogue-Oscilloscope/192455142370
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 ChrisLX200

  • Supporter
  • ****
  • Posts: 462
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7403 on: February 14, 2018, 07:16:48 pm »
I would seriously be tickled pink to see such a thing [SR71] with my own eyes. ;)

Very unlikely to, now. ISTR NASA keeps one flying.

The first time I saw one it had an armed guard, and the other dripped fuel as it accelerated down the runway. I refuse to consider how many decades ago, but I do remember that the entry cost was per car - so we took 7 people in a 5 seat car, with two in the boot :)

There is an SR71 at Duxford, 10 miles south of Cambridge; you can touch it. The last time I went there was in a DC-3 :)

That's a design 'feature' of its titanium body, the leaks stop when the shell heats up during supersonic flight :)
 

Offline bd139

  • Super Contributor
  • ***
  • Posts: 11140
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7404 on: February 14, 2018, 07:19:12 pm »
My wife has vigorously complained about the proposed purchase of a 7904 :(

 

Offline bitseeker

  • Super Contributor
  • ***
  • Posts: 7852
  • Country: us
  • Lots of engineer-tweakable parts inside!
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7405 on: February 14, 2018, 07:23:12 pm »
Less poo on it's ass. Next cnc run a plate under the switches and bnc's with labels.

Woah! Nice job. I wasn't expecting you to be making replacement panels.
I TEA.
 

Offline mnementh

  • Super Contributor
  • ***
  • Posts: 4646
  • Country: us
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7406 on: February 14, 2018, 07:31:56 pm »
Problem I found years ago living out in the countryside is that if you can see your neighbours you can usually smell the cow shit instead :)

Still thinking about that 7904 on eBay. Doesn’t power up. Thinking of low offer. Might just be duff PSU caps as it’s an early switcher.

I grew up on one of the last surviving (okay, taking the longest to die due to my grandfather's obstinacy) family farms in the Finger Lakes region of New York. As you might imagine, I am no stranger to the smell of cow chips, and I prefer it a thousandfold over the smells of Houston where I live now. The difference... you can wash the smell of cowsh** off you. You can't get away from the stink of the city without distance AND time AND lots of showering.

I'll say a prayer for your lumbar as you contemplate this purchase. ;)


I would seriously be tickled pink to see such a thing [SR71] with my own eyes. ;)

Very unlikely to, now. ISTR NASA keeps one flying.

The first time I saw one it had an armed guard, and the other dripped fuel as it accelerated down the runway. I refuse to consider how many decades ago, but I do remember that the entry cost was per car - so we took 7 people in a 5 seat car, with two in the boot :)

There is an SR71 at Duxford, 10 miles south of Cambridge; you can touch it. The last time I went there was in a DC-3 :)

I was a rabid fan of the SR-71 from a young age; the advent of the internet and the postings of the declassified flight logs of NASA, CIA and USAF sorties occupied me for hours on end. I've seen and touched the one in at the ASM in DC; presumably it is the one on exhibit that is closest to flightworthy condition.

Fun fact: They ALL leaked like a seive; both air and liquid. They were tested on the ground in imperfect status; the Skunkworks engineers had to design like the craft was operating at 10 ATM on one end and -2 ATM at the back, and come up with a plane that would seal up at 2,000mph. Somehow they managed near-perfection on the first try with the A-11, then had to completely rethink it all for the addition of the "chines" that gave the A-12 and SR-71 it's distinctive silhouette.

They used the fuel as hydraulic fluid; it was critical to keep it at a stable temperature, and the massive tanks on the craft were the perfect heat sink. They had more failures on the ground due to magnesium wheels than in flight, and when they started work on the variable vector thrust engines (these are a conventional multi-stage compressor jet engine that essentially converts to a ramjet at speed), between existing airframe production and engine R&D, they reserved at triple premium price the entire world's production of titanium for over a year.


Less poo on it's ass. Next cnc run a plate under the switches and bnc's with labels.

Woah! Nice job. I wasn't expecting you to be making replacement panels.

I'm waiting for the followup anodized version with CNC port markings; it's obvious that bean 'as gone 'round the bend.  :-DD



mnem
*Too educated for the country, not enough of an a**hole for the city.*
« Last Edit: February 14, 2018, 07:48:01 pm by mnementh »
 

Offline Cerebus

  • Super Contributor
  • ***
  • Posts: 3396
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7407 on: February 14, 2018, 07:53:28 pm »
Problem I found years ago living out in the countryside is that if you can see your neighbours you can usually smell the cow shit instead :)

Still thinking about that 7904 on eBay. Doesn’t power up. Thinking of low offer. Might just be duff PSU caps as it’s an early switcher.

In your neck of the woods, but I doubt it will end up a bargain.
https://www.ebay.co.uk/itm/TEKTRONIX-465B-Dual-Channel-100MHz-Analogue-Oscilloscope/192455142370

Oy! I was trying to quietly keep my eye on that and you tell the 1/2 pint power NPN that it's just around the corner from him. What are you trying to do to me Tim, what are you trying to do...  :)
Anybody got a syringe I can use to squeeze the magic smoke back into this?
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 15690
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7408 on: February 14, 2018, 08:04:40 pm »
Still thinking about that 7904 on eBay. Doesn’t power up. Thinking of low offer. Might just be duff PSU caps as it’s an early switcher.
This might interest you as I think it's beyond its owners ability:
https://www.eevblog.com/forum/repair/tektronix-7623a-how-to-repair-or-can-anyone-here-use-it/
Avid Rabid Hobbyist
 

Offline bd139

  • Super Contributor
  • ***
  • Posts: 11140
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7409 on: February 14, 2018, 08:06:10 pm »
Yeah I saw that. 7623 isn’t much fun. Storage is nice but not damp shed :(
 

Offline bd139

  • Super Contributor
  • ***
  • Posts: 11140
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7410 on: February 14, 2018, 08:07:24 pm »
Problem I found years ago living out in the countryside is that if you can see your neighbours you can usually smell the cow shit instead :)

Still thinking about that 7904 on eBay. Doesn’t power up. Thinking of low offer. Might just be duff PSU caps as it’s an early switcher.

In your neck of the woods, but I doubt it will end up a bargain.
https://www.ebay.co.uk/itm/TEKTRONIX-465B-Dual-Channel-100MHz-Analogue-Oscilloscope/192455142370

Oy! I was trying to quietly keep my eye on that and you tell the 1/2 pint power NPN that it's just around the corner from him. What are you trying to do to me Tim, what are you trying to do...  :)

Don’t worry I’m burned out on the 400 series now :)
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 15690
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7411 on: February 14, 2018, 08:10:44 pm »
Yeah I saw that. 7623 isn’t much fun. Storage is nice but not damp shed :(
Still, a modular scope is heaps easier to work on and to clean up.
For bugger all it might be worth a punt.
Avid Rabid Hobbyist
 

Offline Specmaster

  • Super Contributor
  • ***
  • Posts: 7337
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7412 on: February 14, 2018, 08:11:41 pm »
Don't worry you can bet your life that bd139 is only too well aware of this 465 already with his custom script running checks on the ole Bay at regular intervals  :-DD
Who let Murphy in?
 

Offline bd139

  • Super Contributor
  • ***
  • Posts: 11140
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7413 on: February 14, 2018, 08:12:22 pm »
I know of any listing within 5 minutes of it appearing :)

I have my eye on something very special already. Priority on that at the moment.
 

Offline Neomys Sapiens

  • Super Contributor
  • ***
  • Posts: 1147
  • Country: de
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7414 on: February 14, 2018, 08:14:17 pm »
I tried to explain to my neighbors getting the radiating portion of the antennas away from the ground lessened the chance for RFI,  I had some who where cool, some who where not.  In the end I won.

74' freestanding tower with KT36XA for 10,15 and 20m and a 5 ele for 6m above.  Rotatable dipoles for 40m off the side and 75m at the top with a 2m/70cm omni to cap it off.


It didn't help I was feeding it from a Henry 4K Ultra hahahahahahah;

Also known as 'the neighbourhood with the year round free morse course (whether you want it or not - delivered by tingling sensation if not in faraday cage)'?
 
The following users thanked this post: kj7e

Offline Mr. Scram

  • Super Contributor
  • ***
  • Posts: 7692
  • Country: 00
  • Display aficionado
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7415 on: February 14, 2018, 08:19:13 pm »
I know of any listing within 5 minutes of it appearing :)

I have my eye on something very special already. Priority on that at the moment.
What's the basic principle of your script? Do you have certain keywords for specific devices? Or do you index it all?
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 15690
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7416 on: February 14, 2018, 08:22:49 pm »
I know of any listing within 5 minutes of it appearing :)

I have my eye on something very special already. Priority on that at the moment.
What's the basic principle of your script? Do you have certain keywords for specific devices? Or do you index it all?
:scared:
Shit, that's like giving away your girlfriends phone # !  :-DD
Avid Rabid Hobbyist
 

Offline kj7e

  • Frequent Contributor
  • **
  • Posts: 734
  • Country: us
  • Damon Stewart
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7417 on: February 14, 2018, 08:26:05 pm »

Also known as 'the neighbourhood with the year round free morse course (whether you want it or not - delivered by tingling sensation if not in faraday cage)'?

What caused the most issues was 40m AM nets weekend mornings.  AM is so easily rectified and I ran my 40m Dipole low for high incidence angle.  400w AM carrier and 1500w (+ or -) PEP at full mod.
 

Offline Mr. Scram

  • Super Contributor
  • ***
  • Posts: 7692
  • Country: 00
  • Display aficionado
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7418 on: February 14, 2018, 08:26:24 pm »
Shit, that's like giving away your girlfriends phone # !  :-DD
Nah. It's like saying you braze your chicken instead of roasting it. Without any other specifics, people can't even come close to replicating it.

Besides, as far as I understand it's bd139's job and specialism. Even with all the information on the table, few can hope to come close.
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 15690
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7419 on: February 14, 2018, 08:29:44 pm »
I tried to explain to my neighbors getting the radiating portion of the antennas away from the ground lessened the chance for RFI,  I had some who where cool, some who where not.  In the end I won.

74' freestanding tower with KT36XA for 10,15 and 20m and a 5 ele for 6m above.  Rotatable dipoles for 40m off the side and 75m at the top with a 2m/70cm omni to cap it off.

Very cool !
That'd be great in my back paddock that's the highest point in a straight line between Aussie and Chile.
You could reach..... anyone !
Feeder length might be an issue.  :(
Avid Rabid Hobbyist
 

Offline bd139

  • Super Contributor
  • ***
  • Posts: 11140
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7420 on: February 14, 2018, 08:34:55 pm »
Shit, that's like giving away your girlfriends phone # !  :-DD
Nah. It's like saying you braze your chicken instead of roasting it. Without any other specifics, people can't even come close to replicating it.

Besides, as far as I understand it's bd139's job and specialism. Even with all the information on the table, few can hope to come close.

Yes. The only thing it can’t do is find things I don’t know I want yet. That’s where this thread comes in  :-DD
 

Offline kj7e

  • Frequent Contributor
  • **
  • Posts: 734
  • Country: us
  • Damon Stewart
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7421 on: February 14, 2018, 08:35:47 pm »
You just need quality coax;



Had 375 feet of this left over from an old auxiliary TV broadcast transmitter.
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 15690
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7422 on: February 14, 2018, 08:38:11 pm »
You just need quality coax;



Had 375 feet of this left over from an old auxiliary TV broadcast transmitter.
Even 10x that won't get your there !  :(
Avid Rabid Hobbyist
 

Offline tggzzz

  • Super Contributor
  • ***
  • Posts: 9649
  • Country: gb
    • Having fun doing more, with less
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7423 on: February 14, 2018, 08:39:33 pm »
Problem I found years ago living out in the countryside is that if you can see your neighbours you can usually smell the cow shit instead :)

Still thinking about that 7904 on eBay. Doesn’t power up. Thinking of low offer. Might just be duff PSU caps as it’s an early switcher.

In your neck of the woods, but I doubt it will end up a bargain.
https://www.ebay.co.uk/itm/TEKTRONIX-465B-Dual-Channel-100MHz-Analogue-Oscilloscope/192455142370

Oy! I was trying to quietly keep my eye on that and you tell the 1/2 pint power NPN that it's just around the corner from him. What are you trying to do to me Tim, what are you trying to do...  :)

Yeah, it is annoying when that happens; ought not to do it. But my excuse for that he did point something out to me recently, and it looks like it will end up Expensive.

Must get back to my barely working 475; after a deep cleanse, the timebase is working - so it is onto channel1. Currently it doesn't look like any caps need replacing.
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 bd139

  • Super Contributor
  • ***
  • Posts: 11140
  • Country: gb
Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #7424 on: February 14, 2018, 08:40:38 pm »
Sorry  ;D
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf