Author Topic: List your test equipment "scores" here!  (Read 558662 times)

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Offline Enigma-man

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Re: List your test equipment "scores" here!
« Reply #800 on: August 02, 2016, 12:20:28 am »
I know this isn't much of a score but it was all for free, nada,zilch, zippo, au gratis, etc.
To buy this stuff, what are we lookin' at here?   Ten or twenty bucks ?

Tektronix 7704A Mainframe
7A26 Dual Trace Vertical Amplifier 200MHz
7B80 400Mhz Horizontal Timebase
Fluke 8500A 6.5 digit voltmeter
Eldorado Electronics Model 1820 4.5 digit voltmeter with Nixie display
Brunelle Model 3030 Function Generator
HP 5221A Frequency counter with Nixie display

All are in very good to excellent condition except the  HP 5221A counter.  Cubdriver said it looks like it was taken out of the box yesterday.  ;D
Actually it was from a trip to the past when Marty McFly and I took the DeLorean for a spin back to 1969 just for snicks to hijack a truck
destined for the HP field office here where I live.  :)
« Last Edit: August 02, 2016, 12:34:06 am by Enigma-man »
 

Offline timb

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Re: List your test equipment "scores" here!
« Reply #801 on: August 02, 2016, 01:52:14 am »
Actually it was from a trip to the past when Marty McFly and I took the DeLorean for a spin back to 1969 just for snicks to hijack a truck
destined for the HP field office here where I live.  :)

Back to the Future meets Fast and Furious, I like it! You could call it, Back to the Furious. ;D
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Offline TSL

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Re: List your test equipment "scores" here!
« Reply #802 on: August 02, 2016, 02:06:21 am »
Tektronix 7704A Mainframe
7A26 Dual Trace Vertical Amplifier 200MHz
7B80 400Mhz Horizontal Timebase
Fluke 8500A 6.5 digit voltmeter
Eldorado Electronics Model 1820 4.5 digit voltmeter with Nixie display
Brunelle Model 3030 Function Generator
HP 5221A Frequency counter with Nixie display

Pictures!!!!, how are supposed to lust after anything without pictures damn it!
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Offline Enigma-man

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Re: List your test equipment "scores" here!
« Reply #803 on: August 02, 2016, 02:20:43 am »
@timb:
Sounds like it might be next Summer's blockbuster to me.

@TSL:
Easy now... Breathe slowly.  No lusting, drooling or other questionable behaviour will be tolerated.

Pictures of the Eldorado 1820 and HP 5221A are in the Products/Other Equipment and Products/ "Let's see your Nixie tube equipment"  on page four and five.
Wander over for a look.
If you don't tell me my 5221A counter is pretty, I'll have to block and ignore you while I hang out here...  :D

I'll get some pix up of the other stuff some time this week.
 

Offline TSL

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Re: List your test equipment "scores" here!
« Reply #804 on: August 02, 2016, 05:32:41 am »

Pictures of the Eldorado 1820 and HP 5221A are in the Products/Other Equipment and Products/ "Let's see your Nixie tube equipment"  on page four and five.
Wander over for a look.
If you don't tell me my 5221A counter is pretty, I'll have to block and ignore you while I hang out here...  :D

I'll get some pix up of the other stuff some time this week.

The 5221 is beautiful, it looks brand new !
I'm interested to see the 8500 - I picked up one of those at a hamvention for $10 in poor condition. It was BER so I'm retasking its chassis as a case for a GPSDO and frequency divider/distributor.



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Offline Enigma-man

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Re: List your test equipment "scores" here!
« Reply #805 on: August 02, 2016, 03:33:09 pm »
@TSL:

Yes, the 5221A looks like new.  It probably did not meets the needs of the lab and probably sat in a box for dozens of years.  I believe it
was the late 90's or early 2000's when my friend put in a bid on a some equipment and the 5221A was in the lot.
Here is a pic of my Fluke 8500A reading the voltage form an Analog Devices AD688BQ precision plus/minus 10V reference chip.
My 8500A only measures voltage and I am hoping to find a donor with the ohms, current and ac plug in boards.
Also is a pic of my Tektronix 7704A.  Luckily for me, all the vintage items are in very good condition.
The lighting is not good so the pictures did not turn out. I don't have  the photography gene...

I forgot to mention when I did some minor work on the scope last year, the bulbs were burned out in the row of switches so I replaced them with
red LED's.  Looks cool with the lights out.  ;D
The voltage calibrator wasn't working and it took a while to find a 7472 flip flop.  I was prepared to modify that area with a more readily available device
but a friend found one.  Only one he had.  I have never come across a 7472 on anything except in my 7704A.
I didn't have two blank plates to fill in the two center slots so I put a piece of plastic over a scrapped cage from the logic analyzer option.
It works well and I am happy with it even though it is big and heavy.
« Last Edit: August 02, 2016, 04:08:24 pm by Enigma-man »
 

Offline rx8pilot

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Re: List your test equipment "scores" here!
« Reply #806 on: August 05, 2016, 12:28:57 am »
Preamble (LeCroy) 1855 Differential Amplifier with matched probes. Seems to work great and got a nice deal on it. Looking for an additional one right now - need two.
Unique piece of test gear, although it is ugly and has a curved top so you cannot easily stack them up. Dumb design in that regard.

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Offline timb

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Re: List your test equipment "scores" here!
« Reply #807 on: August 05, 2016, 12:33:51 pm »
Preamble (LeCroy) 1855 Differential Amplifier with matched probes. Seems to work great and got a nice deal on it. Looking for an additional one right now - need two.
Unique piece of test gear, although it is ugly and has a curved top so you cannot easily stack them up. Dumb design in that regard.

Those are *really* nice little amplifiers. I picked one up awhile back at an auction for $100 in non-working condition. Turned out to be a burnt out regulator.

Wish I would have kept it!
Any sufficiently advanced technology is indistinguishable from magic; e.g., Cheez Whiz, Hot Dogs and RF.
 

Offline timb

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List your test equipment "scores" here!
« Reply #808 on: August 05, 2016, 12:43:53 pm »
My latest bit of kit:



Tek TDS 754C + 2 x P6205 750MHz Active Probes + 2 x P6139A 500Mhz Passive Probes

Free, thanks to rx8's generosity and my luck of the draw! I've currently got it sitting on the floor by my desk, until I get a shelf built to house all my test gear (I just can't fit anything else on the table behind my desk that most of my gear sits on). Thankfully, Tek designed most of their old Analog (and early Digital) scopes with feet on the rear, so you could use them on the floor pointing up.
« Last Edit: August 07, 2016, 12:29:39 am by timb »
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Offline nctnico

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Re: List your test equipment "scores" here!
« Reply #809 on: August 05, 2016, 01:34:48 pm »
Good catch! That must be the cleanest TDS700 series scope I have ever seen (and I did wash the one I had)!
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Offline timb

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Re: List your test equipment "scores" here!
« Reply #810 on: August 05, 2016, 07:56:22 pm »
Good catch! That must be the cleanest TDS700 series scope I have ever seen (and I did wash the one I had)!

Thanks! rx8 took very good care of it. I ended up blowing out some accumulated dust from the inside and washing the exterior (the case, rear panel, front panel, rubber keypad, front trim and knobs).

The only issue with it is the ground connection inside the sealed power filter module appears to be broken. So I ordered a male and female IEC connector from Mouser and rigged up a 3" cord extension with the ground lead broken out. The ground lead has a crimped ring connector on the end, which screws into the metal chassis.

I investigated replacing or opening the sealed filter module, but it was a complete pain in the ass to do, so the cord method seemed like the way to go.

I was going to replace the floppy with one of those USB Floppy Emulators, but I decided to finally get a decent GPIB adapter. In the mean time, I'm using the serial port to "print" hard copies right to my computer. (I wrote a simple Python script to listen on the serial port and save the raw data; I love that the scope can directly print in Post Script format, which OS X can open natively.)

I'm really enjoying the scope so far! Being able to see 1GHz signals is amazing. :D
Any sufficiently advanced technology is indistinguishable from magic; e.g., Cheez Whiz, Hot Dogs and RF.
 

Offline Enigma-man

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Re: List your test equipment "scores" here!
« Reply #811 on: August 06, 2016, 02:12:10 am »
Very nice, but can it play any retro games ?  :D
 

Offline cncjerry

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Re: List your test equipment "scores" here!
« Reply #812 on: August 06, 2016, 03:58:37 am »
You are going to love that TDS 754.  I upgraded my 744 to a 784 and I am pretty sure the 754 can be upgraded to at least a 784, possibly a 794.  The upgrade required removing 4 caps on the acquisition board and then a little trickery to reprogram it.  The upgrade also extended the memory.

My 744 is at least that clean and the shuttered CRT gives such a crisp display plus the colors are just beautiful. 
 

Offline rx8pilot

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Re: List your test equipment "scores" here!
« Reply #813 on: August 06, 2016, 05:50:52 am »
That scope was food on the table for me. Never met the original owner - I was owner 2 - but he/she probably did not use it much. The CRT is still rather bright and sharp. I kept it as dim as possible and used the VGA a lot to extend the life of it.

Solid performer. I never tried to upgrade to 1Ghz because I could not afford a mistake while I owned it. If I kept it, I would definitely try the TDS784 upgrade.

Hope it makes a big contribution to your projects.
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Offline timb

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Re: List your test equipment "scores" here!
« Reply #814 on: August 07, 2016, 01:02:44 am »
You are going to love that TDS 754.  I upgraded my 744 to a 784 and I am pretty sure the 754 can be upgraded to at least a 784, possibly a 794.  The upgrade required removing 4 caps on the acquisition board and then a little trickery to reprogram it.  The upgrade also extended the memory.

My 744 is at least that clean and the shuttered CRT gives such a crisp display plus the colors are just beautiful.

Yes, I've been researching that upgrade and am seriously considering it. However, I don't have any 1GHz signal generators for the calibration, aside from the the 1ns output on my TG 501 Time Mark Generator, but the amplitude is only 250mV, so I'm not sure if that's enough?

I wonder what the cheapest 1GHz source with sufficient fidelity would be?

That scope was food on the table for me. Never met the original owner - I was owner 2 - but he/she probably did not use it much. The CRT is still rather bright and sharp. I kept it as dim as possible and used the VGA a lot to extend the life of it.

Solid performer. I never tried to upgrade to 1Ghz because I could not afford a mistake while I owned it. If I kept it, I would definitely try the TDS784 upgrade.

Hope it makes a big contribution to your projects.

Yeah, right now, since I've got it on the floor, I'm using a little 12" VGA monitor on the desk (made from an old laptop's LCD and one of those conversion kits from eBay), so I can easily look at waveforms while probing. I've got it on a swing arm which makes it super handy!

I do really like the CRT+LCD Shutter though. It took me awhile to get used to it (I kept seeing it flicker in the corner of my eye or when moving) but after using it for awhile I don't even notice it anymore. It's a very bright, crisp, fast display.

Reading about these scopes, I see a lot of people ragging on Tek for using the CRT+Shutter system and I'm sure they had some issues, but for the time these scopes were built, I have to say it was a very nice display technology. You get the crispness and speed of a monochrome CRT with super vibrant colors! At the time, color LCDs were atrocious and I don't think they could get the same resolution and clarity out of a color CRT that small.

Anyway, I think I'll try the 784C upgrade once I get the signal generator needed to calibrate it.

And yes, I'm already putting it to good use on a project where I needed to see some high speed( ~500MHz) transitions clearly. I was using a 2465B for this until I got the 754C; being able to catch glitches and non-repetitive anomalies has already helped me out tremendously!
Any sufficiently advanced technology is indistinguishable from magic; e.g., Cheez Whiz, Hot Dogs and RF.
 

Offline nctnico

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Re: List your test equipment "scores" here!
« Reply #815 on: August 07, 2016, 02:24:37 am »
My 744 is at least that clean and the shuttered CRT gives such a crisp display plus the colors are just beautiful.
I beg to differ. Those shuttered LCD/CRT displays always gave me a headache so I replaced them with TFT. Still technology wise it is the only way to get color CRT without convergence problems.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline TheSteve

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Re: List your test equipment "scores" here!
« Reply #816 on: August 07, 2016, 02:32:19 am »
I wonder what the cheapest 1GHz source with sufficient fidelity would be?

A friend with a signal generator - maybe there is someone local to you on the blog that can help you out.
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Online Berni

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Re: List your test equipment "scores" here!
« Reply #817 on: August 07, 2016, 06:58:01 am »
Not long ago this has arrived.

Its actually just a HP8566B (22GHz boatanchor spectrum analyzer) in two parts due to how heavy it is
« Last Edit: August 07, 2016, 09:08:47 am by Berni »
 

Offline Rbastler

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Re: List your test equipment "scores" here!
« Reply #818 on: August 07, 2016, 07:52:19 am »
Recently I bought a Fluke 25 in a ebay auction for 35€. Some digits on the display where dim, but that was due to a dirty zebra strip. After cleaning, the display is now good. I also had to check the range switch, because it didn't make contact on some ranges. I fixed that to easily.

Edit: Corrections
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Offline KJDS

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Re: List your test equipment "scores" here!
« Reply #819 on: August 07, 2016, 11:10:32 am »
Recently I bought a Fluke 25 in a ebay auction for 35€. Some digits on the display where dim, but that was due to a dirty zebra strip. After cleaning, the display is now good. I also had to check the range switch, because it didn't make contact on some ranges. I fixed that to easily.

Edit: Corrections

I've cleaned hundreds of those zebra strips, never known a flaky display on a Fluke 25 to be anything else.

Offline cncjerry

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Re: List your test equipment "scores" here!
« Reply #820 on: August 07, 2016, 04:34:46 pm »
Not long ago this has arrived.

Its actually just a HP8566B (22GHz boatanchor spectrum analyzer) in two parts due to how heavy it is
You joined the 8566 club, love mine as well as my 8568b.  If you aren't already on the HP google group, I suggest you join.  We recently found a way to significantly reduce the line noise in many of the 8566 units, just take a little rearranging of the cables with the bottom off.

Post some pictures once you get it running...
 

Offline bingo600

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Re: List your test equipment "scores" here!
« Reply #821 on: August 07, 2016, 05:35:13 pm »
[HP google group, I suggest you join. 

Any hints to that group ?

I only know the yahoo group

/Bingo
 

Online Cubdriver

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Re: List your test equipment "scores" here!
« Reply #822 on: August 07, 2016, 06:42:11 pm »
[HP google group, I suggest you join. 

Any hints to that group ?

I only know the yahoo group

/Bingo

I *think* that may be the one he means - yahoo is the only one I know of, too.  If there's another, I'm interested in knowing about it too.

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

Online Berni

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Re: List your test equipment "scores" here!
« Reply #823 on: August 07, 2016, 08:21:00 pm »
You joined the 8566 club, love mine as well as my 8568b.  If you aren't already on the HP google group, I suggest you join.  We recently found a way to significantly reduce the line noise in many of the 8566 units, just take a little rearranging of the cables with the bottom off.

Post some pictures once you get it running...

I did already get it running.

Its in fairly good condition apart from one of the cables being cracked at one of the connectors. Haven't taken the lid off yet but i will probably have to since the grid on the display looks pretty fuzzy and a bit bright compared to the rest of the image. And damn is the thing loud so i might retrofit a quieter fan in it.

What is that group? I used yahoo groups before but im in none of the HP ones.

 

Online Cubdriver

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Re: List your test equipment "scores" here!
« Reply #824 on: August 07, 2016, 08:57:02 pm »
It's the 'HP/Agilent Test Equipment' group on Yahoo.

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


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