About TEK 7000 series scopes

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poobah

poobah

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Joined 2005
#1
OK,

So I have a monster digital scope... about every bell and whistle except DFT and spectral analysis.

I need an analog scope... thinking about about 7000 series... becuase I don't want to tie up alot of money. the versatility is awesome etc...

Please give the good , bad , and ugly on these scopes.

Please save the stories about 465B's etc... 7000 ONLY please. Sarcastic humor, of course, is always welcome.

Interested in the spectral analyzer's and links/methods to buy the newest (serial's etc..)

Thanks guys

:clown:
 
#2
Well, I got rid of my 7704a and then decided I missed the functionality so I purchased another -- great shape and less than $100. I am back to having 4 or 5 scopes. I often use the 2465 or 7704a with TDS3012B

The fellow who started this site left Rutgers and is now at another university: http://www.caip.rutgers.edu/~kahrs/testeq/7000.html The 7100 series is fastest,

An externally hosted image should be here but it was not working when we last tested it.
 
#6
I have 14 Tektronix scopes! Tek scopes insides speak for themseves of engineers of the past that knew what they were doing and exactly what they were building. Can't get enough of em. I have a 7904a but it is only set up with 200 mhz bandwidth modules. I don't do microwave work:xeye: . I actually prefer my old 535A which is a 15 mhz dual sweep toobe scope... I think it has over 70 toobes in it. It is one amazing piece of gear and I've been able to gather up just about every module they ever made for it. Many of the later 500 series modules were hybrid... mainly solid state with one or two toobes. We have to give Tektronix credit for being among te first to use FET's... way back in the mid 60's! I like my 7904a but use the toobe scope alot more. Recently picked up a 575 curve tracer that was last calibrated in the mid 70's that still works just fine.

Mark
 
#7
Does anyone remember how to adjust the memory capture of a 7633? I used one extensively back in the late 70's, but I have forgotten how to adjust the knobs to get it right. Great old scope! Not my first choice, but excellent in any case.
 
#8
John,

There was once a *.mil site where you could pull down all things TEK. For the life of me, I can't find it... it may have gone away.

Home land security I guess... let the terrorists pay for manuals like the rest of us.

🙁
 
#9
There are most of the TEk manuals at thi site.....
Boat Anchor Manual Archive

I have a 7633 that I occasionally use to make current inrush measurements. I set it up for automatic storage mode since I am capturing a pulse with it... still works great.

I don't believe the storage function on these scopes lasts indefinately.... once captured there is a finite time until it gradually disappears. I also have the small 211 hand held Storage scope. The CRT is a flood gun type and does not have near as nice a hold function as the 7633 mesh CRT does. Memory settings are quite critical on the 211.

Mark
 
#10
The TEK scopes can measure "quiet" -- or at least the old ones can.

WRT the spectrum analyzer modules -- the only one I have used is the 5L4N -- not being old enough to graduate to those employed by the 7XXX series. I do have a couple HPs bought after the collapse of the internet bubble. Regrettably, the collapse of the home-construction market in the U.S. will not pay the same dividend.
 
#11
The tube scopes...5XX series that had interchangable verticle modules had several modules available that could read down in the uv region.... I think one would have to put at least two 7A26's which are good down to 5 mv in series to be able to do that.
The 1A1 had a sensitivity of 500uv and there are also differential input modules with similar sensitivities.

Mark
 
#13
I believe that the TEK 1A7 differential will do exactly the same thing. Of course on HAS to have a screen room or be well underground in order to read anything accurately at that low of level.

I picked up a nice-mint 564B Storage Scope yesterday for 40 bucks. In like new condition it is an ex-BYU Physics scope so probably does not have tons of hours on it as an industrial lab scope normally would. All tubes test good and it works perfectly. Sure, its only 15mhz but its dual flood gun type storage crt has a trace as sharp as a regular scope does... much sharper than my 7633 mesh type storage scope has.

I have alot(over 20) of both TEK solid state and tube scopes and the tube scopes are still the better performing of the lot.

Mark
 
#14
if you note the Linear Technology website application notes -- Jim Williams uses a TEK tube scope for his noise measurements.

I went to rent the Faraday-Shielded room at my alma mater in NYC -- regrettably they had taken it apart. I now have a setup with brass screens retrieved from the dumpster. I think that when you see an amplifier with THD approaching 0.0004%, or the noise measurements in the pico-volts they have made the measurement in a shielded environment.
 
#16
Jim Williams uses a TEK tube scope for his noise measurements.
Click to expand...

He is most likely using the 1A7 diifferential amp to do this since it has the lowest noise floor of all the tube based plig ins. I am in the process of cleaning one up (Ultrasonically) that I just bought on E-Bay. I also picked up a 1L20 Spectrum analyzer but have not received it as of yet... this is a VERY rare TEK piece!

Mark
 
#17
I received my 1L20 spectrum analyzer plug-in the other day. This is a really neat piece and a very rare one at that.
 

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