computer KO

The only 7000 series I ever used was a 760x with a spectrum analyzer & the CATV preamp plugin. I had to repair the power supply in it, back in the early '80s. That was fun, with no manual.

I currently have these Tek items:

Scopes: 324 ($20 + a half pound of mud to remove after it was dug out of the ground in a scrap yard), a 453A, and the 2465A.

Vectorscopes: Two 1720 (bought for $10 each)

Waveform monitors: One RM529 ($200, bought in the late '80s) Two

1730 and two 1730D (bought for $10 each)

Video test set, which is a waveform monitor & vectorscope in one package. It may be the only thing Tek ever built with two CRTs . ;-)

Video waveform generator: TSG170 ($40)

7B85 Delaying Time Base Plug-in ($5)

I also have a military scope built by Magnavox (from Freecycle), and another waveform monitor built by HP. ($35, bought in the late '80s)

Save a search, if you really want one. I have 15 saved at the moment, and had a few others that finally turned up what I wanted at an affordable price.

Here are a few current searches:

Tektronix 324 Tektronix 7A

Tektronix 7D Tektronix 7K Tektronix 7L

I had one for a Fluke FLUKE 8920A 20 MHz True RMS voltmeter that got me three damage meters for $30. One meter was made out of the pile, instead of paying $250-800 for one.

Easier today. Almost all Tek manuals can be downloaded from a number of sites.

Bad caps?

760x would be 100 MHz bandwidth (IIRC), with two vertical slots and one horizontal one -- and no storage capabilities. (That '0' would be a '1' or '2' depending on how fancy the storage was. :-)

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O.K. *That* one is for a 7000 series mainframe -- and one of the later ones, IIRC.

Was that one which was made as a clone of one of the 5xx series Tek 'scopes?

[ ... ]

I *have* one -- from a hamfest perhaps ten years ago. I think that it cost me something like $65.00 at the time. A friend more recently got one after seeing mine.

As for the other Tek stuff:

7623 storage mainframe 7913 storage mainframe with power supply problems still. 7603 out in /dev/barn -- I think that it also needs power supply work. 7B53 timebase (horizontal) 7B52 timebase (horizontal)

several single and double vertical input preamps which I won't bother to go down and look up to list. :-)

7D?? (digital analyzer (16 bits in) and the 7F?? display formatter to go with it. 454 (portable scope, no plugins, but bandwidth to 150 MHz at the probe tip. It was all solid state except for the CRT, and Nuvistors on the two vertical channels and the one external trigger channel. Made it a *lot* more rugged than the 453 (FET front end) which we zapped a time or two with hour HV stuff in the lab. :-)

RM-454 (same thing in a rack-mount adaptor).

22?? (lightwight portable scope, no plugins, something like 60 MHz bandwidth I think.

Lots of probes.

And a third-party spectrum analyzer plugin for the 7000 which needs fixing.

[ ... ]

HP DVM -- rack mount with lots of resolution.

Portable modular HP DMM with GPIB deck in between. Also serves as a frequency counter.

GR Strobotac (nice for speed measurement of machines, and watching cycling machines to see what is going wrong)

GR decade boxes.

GR decade attenuator boxes.

GR sound level meter and calibrator.

Fluke model 27 Handheld DVM (I had a 77, but the continuity beep was too high pitched for my hearing, so I sold it.

Various lab type power supplies, including three Power Designs

2005 units. (Dial in voltage with four knobs from 0.000 to 9.999 and a switch to add 10.000 volts to it. Crystal oven around the voltage reference. With current limit.

Power Designs 3650 (I think -- 0-36V, 0-5A With current limit.

And certainly a number of other things that I've forgotten, (Including a relatively new function generator.)

Oh yes -- Tek TM-500 mainframe/power-supply and two plugin (so far) -- digital multimeter, and three output power supply -- 5V, and dual outputs 0 to +15 and 0 to -15V which track with a common knob, or independent adjustment. Nice for mixed logic and op-amp circuit development. :-)

And the TM-500 lives on a shelf below the 7623 on a cart beside my electronics workbench.

Enjoy, DoN.

221? 5mhz

Had one stolen. I actually miss the hell out of it

LOL..they are ALL too high for my hearing. Ive not been able to hear continuity testers, watch alarms and whatnot for 20 yrs.

Nope! Four digits (thus the two '?'s). 2215. And yes, it is

60 MHz bandwidth. I just checked.

Lightweight because it had more plastic and less metal than the

454, otherwise not too much different in size.

Those were nice, and a lot more portable. It would fit in an overcoat pocket.

Pity to lose it.

Good Luck, DoN.

Try a model 27. It is a *lot* lower in pitch than the 77 and the watches. Most of the little timers around I can hear only as a string of "ticks" as the burst of tone turns on and off. Only one is a pitch which I can hear, and I keep close track of where that one is. :-)

And there was another -- a model 37 IIRC -- which was a 27 in a bench-mount case with a storage compartment for the probes and accessories and a handle to move it easily. That one is a little harder to hear, because the sound has to make it past the battery door, and the storage compartment door as well.

For both, there is also a diode check range (the continuity range), which beeps solid for a really low resistance, or gives one short beep for a single silicon or germanium forward voltage drop.

With a Fluke 77, I had two choices:

1) Ask my wife to repeat the beeps when she hears them. (And her hearing has gotten worse over time. too.) 2) Turn on an audio oscillator, connect to a small speaker, and tune it to a frequency within about 1 KHz of the beeper, so I will hear a beat frequency from the combination of the two. (And this only when my wife is *not* here toe be annoyed. :-)

Far too little stuff with beepers bothers to specify the operating frequency. It could make a big difference as to whether I would buy it or not.

Enjoy, DoN.

Build a detector to flash a LED, or drive a 555 and speaker. A 567 PLL chip and a few other parts would do it. Use a potentiometer to tune it while the leads are shorted, to give a continuous tone. Then you could use it with any device you can't hear.

A good idea -- except that it is yet one more thing to carry if I use it in the field.

Enjoy, DoN.

It could be smaller than a pocket transistor radio, and carried in your pocket. :)