Thank you so much for this lesson. I recently purchased a 2465B and had no Idea how to use this feature. Over the next week, I have to get on the bench and practice this until I am comfortable using it. Can't wait.
I for one marvel at the inventiveness of engineers of yesteryear, who couldn't just throw a faster processor and more ram at a problem. Some of the things they came up with were just stunning.
Old scopes always amaze me. I can't even start to figure out how they fit all of those features in a unit with old school component technology. I have a Tek 2465 at home I just fire up now and then to play with.
twjonckheere I also have a 2465 just recently reconditioned. replaced all the electrolytics and resoldered all the hot spots on the power and deflection boards. sad to say I wasn't able to repair the 2nd channel. it's reading so far off from calibration when dc coupled. tektronix is the best analog scope I ever ever used so far. the triggering is super and the intensity of the trace is sharp even when signals are so high in frequency and in fast rise times. full packed with features too.
i bought a second hand scope , the 350Mhz version. After seeing your vid, i finally know all the features of it, and that the scope is functionning perfectly still. Tthanks :)
I have a 2467 with the CTT option and I've just discovered that it gives you a couple of extra tricks. First, the CTT will measure the time delta between triggered B sweeps. Second, with the CTT option, it's possible to set up separate slope and trigger levels for each of the B sweeps. In combination, you could e.g. use this to measure the length of a pulse by triggering on the fall/rise.
Tek had this technology nailed! I'm still using my Tek R7844 and Tek 7834 each equipped with 2) 7B92A delay time bases every day alongside a contemporary imported DSO. Also use a Tek 2247A portable.👍
It is 8 times the power (double the 6db value). Every 3db is a 2:1 ratio in power, every 6db is a 4:1 change in power). Keep in mind, this is for power, not amplitude. A 3db increase is double the power, but and increase in amplitude (voltage) of 1.414, a 6db increase is 4 x the power, but double the amplitude.
I see these kinds of features as something for engineers to spend their time thinking about and working on before they had to spend all their time debugging software and fighting with a compiler that won't install and doesn't work right and that sort of thing. What else are you gonna with all that brain power?
I have a 2465B, love it, also have a TDS350 but still use the analogue more, and now I know another function to further keep me away from digital scopes!! I think this series of scopes were some of the best made!!
Always enjoy your videos Alan. I just was given a 2445A, that was is need of some care. Turns out it works just fine, but some prior owner, broke off the shafts of the vernier controls for both VOLT/DIV channels. Fortunately I got them back to the calibrated position, but not enough shaft left to attach a knob on. I also own the 2465 (300 Mhz) and it is my go to scope even though I have a modern digital scope.I just think Tektronix made the best scopes and their durability is a testament their quality.
Fortunately, you rarely need to move those controls off of the Cal position. I've heard some folks that have replaced the shaft with a small piece of metal tubing or even a small fiberglass rod from a hobby supply shop.
@@w2aew Yes, that is my experience. I thought about the fixes you mentioned, after looking inside, only the metal tubing seems practical unless I want to take the the Vertical section apart. I am a retired engineer (Rutgers) and a ham (Extra class K7MLG and have been repairing vintage radios and test equipment to keep busy. Again I really enjoy your videos they are the most accurate and enlightening on oscilloscopes.
A button for everything. The real beauty of these scopes. So easy to change modes and see what's happening without going into menus! Although I do prefer the vertical position knobs to be closer to the scaling knobs. ;-)
Thanks for this Alan. I used to use my Phillips scope to view video with the delayed time base, now I know how to do it on my 2465A. Excellent well explained video as usual.
Always i say that are incredible the characteristics of these analog equipments. I imagine the team behind the construction and the responsabilities of the engeneer in chief. Very thanks for sharing Alan.
An excellent showcase of a complex feature! We test these scopes at my workplace, and the timebase testing has always been difficult to understand. Your explanation has helped me understand it so much better.
I guess a lot of people are not going to use these tricks for much longer but it is a good demonstration on how instruments can be designed to be smart. And explains some of the complexity of the device and why there are gazillions of parts on the boards inside, nowadays that would just be a bit of software I guess.
Nice video Alan. Tek did and do make some outstanding scopes. That's a nice example, I'de be proud to own that. I think I would prefer to use it than my two modern DSO's. Siglent SDS1102CML and SDS1104X-E. both of which together, probably don't cost as much as your TEK2445B.
Great as always. May be do an episode about how the delays are used to make meaningful measurements. Even something goofy like how a switching transistor in a power supply works. The "delay" of the inductive aspect of the transformer winding is interesting. Can we make a quality guess without a Clive style teardown by looking at the different individual windings? Crazy I know, but that's the sort of stuff we tried to do in '85.
I"ll jot that down. I have a few videos that use the delaying timebase to make "real" measurements already. One shows how to use the delaying timebase to accurately measure frequency. Another shows the use of the delaying timebase to help characterize an RF power detector. There are probably a few others too.
Best video for My morning coffee:) 2445B series is the MUST have analog scopes. I still hunting for a nice piece, but nobody wanna sell it :) I found one NOS! Price? 3500 bucks! Eh... thanks!
Robert Calk Jr. but not New, never used :) Maybe I’am a bit picky? Nope! One time I will get one NEW in original box, for a reasonable price. I still hunting!
Just scored a Tek 2430A. I hope it works is well as the old 485 I got a few weeks ago. Becoming an old Tektronix junkie 😝 I need to stop looking at scope deals on eBay. Got the 2430A for $45, $55 to ship lol. Running out of bench space.
Cool !! I just got my scope 2 years ago. All sorts of cool stuff !! I use the analog one for when I need more perception. Like when a waveform has more complicated structures. In a digital scope the refresh rate is dismal, so catching non-periodic anomalies Is damn near impossible... I really wish the old scope had more on screen measurements and COLOR .. jeez different color traces . who woulda thought that was needed !! =joke ... I knew the pull knob zoomed, but I didn't know when you turn it it magically pops up a new mini version, and all the other tricks u showed .... hmm . now thinking about it > whats the deal with the var , is there some magic special reasons they exist more than merely shrinking ?
The VAR control on the horizontal timebase is for those rare occasions where you don't need a calibrated sweep speed, but rather need to display a specific time-duration of a waveform which would require a time/div setting that falls between two of the calibrated positions on the knob.
Hi, I am reading that some (better) analog scopes have delay line so one can see the actual trigger signal, or even some part before? I think, if somebody, you should know about that feature? So you maybe would like to elaborate on that. And if they do not have it, if we would have a external analog delay, we could feed the original signal into the external trigger input and the delayed signal to a regular channel. Old TV's used (only PAL maybe, not sure) a delay line, but my knowledge about that ends there. And no idea what handy part could be used here for (not to have to use a big lumpy coil). I am getting tomorrow a blown-up 2445 that I will try to resurrect from the dead. I hope only one of the RIFA's blown up and the rest hopefully stayed undamaged, fingers crossed 🤞 Greets! Edit: if I calculated it right, 10m of coax would give a nice 50ns delay 🤔 That is actually not so bad. Edit 2: I see that an Tektronix external delay line like DL-11 is still not very cheap 😁
Yes, many do have a delay line for that purpose. Some also have an output that provides a buffered copy of the signal at one of the inputs. This could also be fed back into another input as another source of a delayed signal to see more of the pre-trigger waveform.
@w2aew okay, Good to know 👍 then you probably delay the copy of the input signal externally and trigger on that on the second ch. The original input signal is then "further in time".
Hey! I got a Tek 2465A, it appears to me that the focus is not perfect! I'm afraid to try the calibration of the focus trimpots. Have you ever done it ?
I love my Tektronix 2465 DMS, but since I never understood completely A/B Sweep Delay .... until I saw your video! You are a wealth of information and thank you for helping others like me by making your videos! My scope isn't as sharp - display isn't as crisp as yours - what would be some steps I can take to remedy that? Stay sage and healthy!
Great video. I have a 2246 with an odd symptom I wonder if you had seen before. The Voltmeter function of the scope is intermittent, and when it doesn't work it displays "Ouch. Turn Volts/Div CCW" even with no signal in. I can't find anything in the service manual and thought with you vast experience that maybe you had experienced this symptom before? Thanks for the wonderful content.
Sorry, I don't have any experience with the 2246. Sounds like the voltmeter is thinking it is getting over-ranged. The experts on the TekScopes group may have some experience to share.
I just bought a 2445 for $186 on eBay including shipping. Did I get burned or a good deal? I currently have a Iwatsu SS-5710 but I've always wanted a Tektronix because they show information on the screen like the volts/div and the sec/div and my Iwatsu doesn't do it.
Great video! I have Tek 2465 DMS that isn't working well. Any suggestions where to look to fix it? Sometimes I get trace on all 4 channels but sometimes they go away, Also the text/numbers at the top + bottom aren't always visible, they go to some electronics heaven but if I wiggle stuff, sometimes I get ti to stay on. Also, when I push the "beam finder" button, everything shrinks, so all 4 channels are about 2" long and the text is just small pixels - all in the center. Thanks for sharing and teaching here!
Hi. One question about the crt. How much better would be the micro-channel plate CRT in 2467(B) compared to the "standard" crt? Especially with those high bandwidth scopes. In anyway one would maybe wanted to spot some glitches and I was wandering if the u-channel plate would provide much more chance to see it...???
Hi mate. I was wondering if you have an opinion on whether you should operate your analog oscilloscope on no timebase mode (beam stationary) or any mode that would leave a constant electron beam on a single area. Will it burn the phosphor behind the glass? I purchased my analog oscilloscope last night and the seller has taken very good care of it and told me not to let the trace stay stationary. I believe him, I just don't know how paranoid I need to be and how many seconds/minutes before it will overheat. The model is a Pintek PS-605
It is difficult to say. A static dot can certainly cause damage. How quickly is a product of the dot intensity and duration (and the quality of the CRT). Best practice is to NOT have a static dot if possible, at least have it sweeping. And use the minimum brightness/intensity needed to get the job done.
@@w2aew Thanks mate. Sorry I was a way and didnt get a chance to reply. You are 100% correct. I finished reading through the manual and it says to avoid keeping the sweep too slow and only use high intensity when needed, and not for too long. Thanks mate. I'm learning from your videos
Quick question. I'm assembling my electronics workbench (aimed at RF - primarily HF but it would be nice to cover up to the 70 cm band) and I need to pick a scope. Any suggestions that wont break the bank? As we are on the topic, a video on how to put together a instrument setup for RF test, repair and design without selling you kidney and first-born would be great!
That's a quick questions that doesn't have a quick answer. A decent scope is helpful. I like analog to look at RF envelopes, etc. Digital scopes add FFT capability for rudimentary spectrum analysis, as well as a ton of other features. Good RF power meter is typically needed. An RF signal source can be very helpful. Even an SDR based spectrum analyzer can be quite useful. There are a lot of amateur grade RF equipments (analyzers, VNA, siggen, etc.) based on small microcontrollers, DDS chips, SDR receivers, etc. that can be very useful in test/repair/design.
w2aew The RF power meter I did not think of. On the other hand I do fancy some of those TX test sets - Marconi has a model that is kinda ’afordable’ second hand. There are also some reasonably afordable simple siggens out there - also from Marconi. Also realized that the scope should have 50 ohm inputs. Anyways, thanks for the input.
@@w2aew Mine was 15000 czk = $690 - bought from a service company after a refurb with a one year warranty. I bought it as a replacement for my 466 + 44 which was unfortunately stolen. Thanks for the video, I'm smarter again. Nice day 🙂 Tom
Thank you for this Alan. I've got a 2467B and had been trying to find out what other features I'm missing out on. This makes it so much easier. One thing I've also got to ask about the 2400 series is why does the ground terminal use a banana jack over the clip on method used today and on the cal signal on top for probe cal. Does it offer a dual purpose?
Gives you a way to tie scope ground to your equipment / circuit ground - especially useful for low frequency applications where you can then omit the probe ground connection.
Hi Sir I get 2465B from my dear friend ho died from cancer few month before... i have problem with oscilloscope and for legacy and memory i wont repair.. can you help me to fine manual and anther stuff... best regards..
Copied from another forum: If you want to check how much the scope has been used, you can run the Diagnostic Exerciser EXER 05. It will tell you the total operating time and the power cycle count. Here's how you run this: Press and hold the delta-V and delta-t buttons, then press Trigger SLOPE (while still holding down delta-V and delta-t). Release all buttons. Then press the upper/lower Trigger MODE buttons until EXER 05 is selected. Then press the upper Trigger COUPLING button to run EXER 05. You can exit the exerciser with the lower Trigger COUPLING button and return to normal scope operation with the A/B TRIG button.
@@w2aew my machine is baby... me2... in this field... i ask and they block me.. I do not why.. I read... ask... I just start print manuals PDF... HR ON 8116 PWR ON/OFF 2177 i just find weak spot is u800 like I have on board... :( i do not know what I can to do last longer...
While this family of scopes does have a microprocessor, the delaying timebase capability also existed in several Tek scopes that had no uP at all - pure elegant analog design.
I don’t understand why shortening the A sweep would help with B sweep intensity. If there are separate beams for A and B sweep, it shouldn’t matter. If one beam is drawing both, surely it can’t draw both sweeps at the same time - it must draw first sweep A and then wait for another trigger, delay and sweep B, so the length of sweep A shouldn’t affect the intensity of sweep B in this case either.
A bright beam is "blinding" the operator's eye in regards to the less bright beam. This effect is visible on the video. Else said: if you turn off the brighter beam, the dimmer beam is easier to see
The scope only has 1 beam. It doesn't draw both at the same time but (I think, not sure) it does not wait for another trigger to draw the delayed B sweep. The incoming signal is fed through a delay line to get the delay. Meaning the exact position and portion of the waveform you select on the screen to be displayed as trace B is actually what the scope draws as trace B, it's that exact signal.
google sucks: this is time base..... not frequency base :) two total different world. When the clock is better then a pancake? Or.... car vs watermelon
As for example this NTSC signal with an Oscilloscope you can see how the puslses relate to each other in time, Vertical,Horizontal, signal etc where if you used a Spectrum Analyser you would just see the frequencies in the signal with no information on how they relate. Oscilloscopes display Amplitude vs Time and Spectrum Analysers display amplitude frequency.
Thank you so much for this lesson. I recently purchased a 2465B and had no Idea how to use this feature. Over the next week, I have to get on the bench and practice this until I am comfortable using it. Can't wait.
Excellent video. I just added a 2465B to my bench and am amazed as to what these old analog scopes can do. Thanks!
I for one marvel at the inventiveness of engineers of yesteryear, who couldn't just throw a faster processor and more ram at a problem. Some of the things they came up with were just stunning.
As a software dev, creating software these days are a million times easier then 30 years ago as well.
Wow. Still have a lot to learn about my 2467. Thanks for the demonstration.
Nice. I just got my hands on type 453 oldie scope. Still learning these triggering features. Seems I also got this delay thing you speak of.
I have a 2445a and I never knew about this! I'm amazed!
Old scopes always amaze me. I can't even start to figure out how they fit all of those features in a unit with old school component technology. I have a Tek 2465 at home I just fire up now and then to play with.
twjonckheere I also have a 2465 just recently reconditioned. replaced all the electrolytics and resoldered all the hot spots on the power and deflection boards. sad to say I wasn't able to repair the 2nd channel. it's reading so far off from calibration when dc coupled. tektronix is the best analog scope I ever ever used so far. the triggering is super and the intensity of the trace is sharp even when signals are so high in frequency and in fast rise times. full packed with features too.
i bought a second hand scope , the 350Mhz version. After seeing your vid, i finally know all the features of it, and that the scope is functionning perfectly still. Tthanks :)
I have a 2467 with the CTT option and I've just discovered that it gives you a couple of extra tricks. First, the CTT will measure the time delta between triggered B sweeps. Second, with the CTT option, it's possible to set up separate slope and trigger levels for each of the B sweeps. In combination, you could e.g. use this to measure the length of a pulse by triggering on the fall/rise.
Tek had this technology nailed! I'm still using my Tek R7844 and Tek 7834 each equipped with 2) 7B92A delay time bases every day alongside a contemporary imported DSO. Also use a Tek 2247A portable.👍
Love that sharp analog display. Beautiful instrument.
If you like that one - you'd really love the 2467, or even the 485.
What an extremely complex feature for an analog scope, would never have expected such an old scope to have such a complicated feature.
Most of the better old scopes have this feature. My 80's vintage Tektronics 2215A has delayed sweep.
Dantali0n, I can't imagine how they achieve this on an analogue scope.
It is 8 times the power (double the 6db value). Every 3db is a 2:1 ratio in power, every 6db is a 4:1 change in power). Keep in mind, this is for power, not amplitude. A 3db increase is double the power, but and increase in amplitude (voltage) of 1.414, a 6db increase is 4 x the power, but double the amplitude.
I see these kinds of features as something for engineers to spend their time thinking about and working on before they had to spend all their time debugging software and fighting with a compiler that won't install and doesn't work right and that sort of thing. What else are you gonna with all that brain power?
I have that 'scope and realise how much of it's potential I've missed - great video, will try this out tomorrow!
I have a 2465B, love it, also have a TDS350 but still use the analogue more, and now I know another function to further keep me away from digital scopes!! I think this series of scopes were some of the best made!!
3 years later.. is the 2465B still holding up okay? I'm going to recap the PSU in my unit
@@alexsinclair2012 gets used almost daily, I have never had any issues with it (touch wood!!).
Always enjoy your videos Alan. I just was given a 2445A, that was is need of some care. Turns out it works just fine, but some prior owner, broke off the shafts of the vernier controls for both VOLT/DIV channels. Fortunately I got them back to the calibrated position, but not enough shaft left to attach a knob on. I also own the 2465 (300 Mhz) and it is my go to scope even though I have a modern digital scope.I just think Tektronix made the best scopes and their durability is a testament their quality.
Fortunately, you rarely need to move those controls off of the Cal position. I've heard some folks that have replaced the shaft with a small piece of metal tubing or even a small fiberglass rod from a hobby supply shop.
@@w2aew
Yes, that is my experience. I thought about the fixes you mentioned, after looking inside, only the metal tubing seems practical unless I want to take the the Vertical section apart. I am a retired engineer (Rutgers) and a ham (Extra class K7MLG and have been repairing vintage radios and test equipment to keep busy.
Again I really enjoy your videos they are the most accurate and enlightening on oscilloscopes.
Tektronix is great.Tthe way they managed the company and how the engineers were working at their full potential amaze me
A button for everything. The real beauty of these scopes. So easy to change modes and see what's happening without going into menus! Although I do prefer the vertical position knobs to be closer to the scaling knobs. ;-)
Yep, no stupid menu diving.
Love my 2465. Love your videos. Thanks for sharing this. Amazing what Tek was doing so long ago!
Thanks for this Alan. I used to use my Phillips scope to view video with the delayed time base, now I know how to do it on my 2465A. Excellent well explained video as usual.
I have a 2467B and will be awesome if you can do much more videos exploring these beasts.
I thought this kind of functions is exclusive to the digital oscilloscope. Very interesting. Thank you.
Even the 60MHz Tek 2215 has some of these functions.
Wow I never knew my old 2465 could do this, thanks for the very clear explanation.
Always i say that are incredible the characteristics of these analog equipments. I imagine the team behind the construction and the responsabilities of the engeneer in chief. Very thanks for sharing Alan.
Another part of the puzzle explained. Thanks Alan!
I've read through my owners manual a couple of times, but it's hard to learn things about scopes without actually putting it into practice.
An excellent showcase of a complex feature! We test these scopes at my workplace, and the timebase testing has always been difficult to understand. Your explanation has helped me understand it so much better.
Excellent tutorial. Thanks for taking the time.
Nice video Alan. Amazing what we forget due to technology. Have a great day.
Thank you for the insight. Awesome design
Clear and easy to understand video , nice shot of the front of the 'scope ;-)
Thanks Alan! There's a lot of ability to my scope that I haven't taken the time to learn about.
I guess a lot of people are not going to use these tricks for much longer but it is a good demonstration on how instruments can be designed to be smart.
And explains some of the complexity of the device and why there are gazillions of parts on the boards inside, nowadays that would just be a bit of software I guess.
Another very well presented video. Very useful content.
Thank You !!!!!
That was a good one, very nice, thanks for sharing.
Show us more, these scopes are great
Nice video Alan.
Tek did and do make some outstanding scopes.
That's a nice example, I'de be proud to own that.
I think I would prefer to use it than my two modern DSO's. Siglent SDS1102CML and SDS1104X-E. both of which together, probably don't cost as much as your TEK2445B.
Amazing features, thank you!
Благодаря за видеото! Thanks for video!
Thankyou. Very informative.
This is one of my favorite trigger modes and I miss not having it on the lower end scopes.
Thanks for showing how to pull the knob, I thought my old 2465 had issues.
Is any chance you could do the video, about the techniques used to measure/spot short, single pulses on analog scope (Tektronix 2465b or similar)
Great video!!!! Really like your videos.
Useful video
Great as always. May be do an episode about how the delays are used to make meaningful measurements. Even something goofy like how a switching transistor in a power supply works. The "delay" of the inductive aspect of the transformer winding is interesting. Can we make a quality guess without a Clive style teardown by looking at the different individual windings? Crazy I know, but that's the sort of stuff we tried to do in '85.
I"ll jot that down. I have a few videos that use the delaying timebase to make "real" measurements already. One shows how to use the delaying timebase to accurately measure frequency. Another shows the use of the delaying timebase to help characterize an RF power detector. There are probably a few others too.
Excellent
Best video for My morning coffee:) 2445B series is the MUST have analog scopes. I still hunting for a nice piece, but nobody wanna sell it :) I found one NOS! Price? 3500 bucks! Eh... thanks!
There are a bunch on ebay for under $300.
bandersentv In original, new, unopened box? I don’t think so..... ultra rare!
My 2465A DV that I bought on eBay for around $400 is in nearly mint condition.
Robert Calk Jr. but not New, never used :)
Maybe I’am a bit picky? Nope! One time I will get one NEW in original box, for a reasonable price. I still hunting!
To quote Marko from Tropoia in the movie Taken, "Good luck." lol
Useful! Thank you.
Just scored a Tek 2430A. I hope it works is well as the old 485 I got a few weeks ago. Becoming an old Tektronix junkie 😝 I need to stop looking at scope deals on eBay. Got the 2430A for $45, $55 to ship lol. Running out of bench space.
great vid ty
Is this only on the B series or was this also available on the A and original?
All of them have this.
how can i stop the triggering sweep on a 7hz wave?, like it is too damn slow so that i can count the peaks. how can i save it on memory?
Analog oscilloscopes like this have no memory. The only way to "save" it is to take a picture (which is why we had scope cameras back in the day).
@@w2aew thank you, any recomendado modelo of camera for this scope?
Cool !! I just got my scope 2 years ago. All sorts of cool stuff !! I use the analog one for when I need more perception. Like when a waveform has more complicated structures. In a digital scope the refresh rate is dismal, so catching non-periodic anomalies Is damn near impossible... I really wish the old scope had more on screen measurements and COLOR .. jeez different color traces . who woulda thought that was needed !! =joke ... I knew the pull knob zoomed, but I didn't know when you turn it it magically pops up a new mini version, and all the other tricks u showed .... hmm . now thinking about it > whats the deal with the var , is there some magic special reasons they exist more than merely shrinking ?
The VAR control on the horizontal timebase is for those rare occasions where you don't need a calibrated sweep speed, but rather need to display a specific time-duration of a waveform which would require a time/div setting that falls between two of the calibrated positions on the knob.
Why are these scopes a little more expensive? now we can see why! For their age, superb scopes indeed.
Hi, I am reading that some (better) analog scopes have delay line so one can see the actual trigger signal, or even some part before? I think, if somebody, you should know about that feature? So you maybe would like to elaborate on that. And if they do not have it, if we would have a external analog delay, we could feed the original signal into the external trigger input and the delayed signal to a regular channel. Old TV's used (only PAL maybe, not sure) a delay line, but my knowledge about that ends there. And no idea what handy part could be used here for (not to have to use a big lumpy coil). I am getting tomorrow a blown-up 2445 that I will try to resurrect from the dead. I hope only one of the RIFA's blown up and the rest hopefully stayed undamaged, fingers crossed 🤞 Greets! Edit: if I calculated it right, 10m of coax would give a nice 50ns delay 🤔 That is actually not so bad. Edit 2: I see that an Tektronix external delay line like DL-11 is still not very cheap 😁
Yes, many do have a delay line for that purpose. Some also have an output that provides a buffered copy of the signal at one of the inputs. This could also be fed back into another input as another source of a delayed signal to see more of the pre-trigger waveform.
@w2aew okay, Good to know 👍 then you probably delay the copy of the input signal externally and trigger on that on the second ch. The original input signal is then "further in time".
Hey! I got a Tek 2465A, it appears to me that the focus is not perfect!
I'm afraid to try the calibration of the focus trimpots. Have you ever done it ?
Slightly different subject. Do you know where I could find a replacement fan for the 2465A?
Any information would be appreciated.
Thanks.
I love classic analog Tektronix scopes! My 2465A is the pride of my collection. One of these days maybe I'll snag a 2465B or 2467B...
:-)
I love my Tektronix 2465 DMS, but since I never understood completely A/B Sweep Delay .... until I saw your video! You are a wealth of information and thank you for helping others like me by making your videos! My scope isn't as sharp - display isn't as crisp as yours - what would be some steps I can take to remedy that? Stay sage and healthy!
Careful adjustment of focus and astigmatism controls might help. Also, it tends to look sharper on video...
@@w2aew Thanks! I'm watching Keith Noneya video how to calibrate focus... He is also very good and I subscribe him also.
Great video. I have a 2246 with an odd symptom I wonder if you had seen before. The Voltmeter function of the scope is intermittent, and when it doesn't work it displays "Ouch. Turn Volts/Div CCW" even with no signal in. I can't find anything in the service manual and thought with you vast experience that maybe you had experienced this symptom before? Thanks for the wonderful content.
Sorry, I don't have any experience with the 2246. Sounds like the voltmeter is thinking it is getting over-ranged. The experts on the TekScopes group may have some experience to share.
These Ole Tekz R00l!
Tho come to think of it, this one's not _that_ old... 😉
I just bought a 2445 for $186 on eBay including shipping. Did I get burned or a good deal? I currently have a Iwatsu SS-5710 but I've always wanted a Tektronix because they show information on the screen like the volts/div and the sec/div and my Iwatsu doesn't do it.
Thats a nice scope, I would say that you got a good deal.
Great video! I have Tek 2465 DMS that isn't working well. Any suggestions where to look to fix it? Sometimes I get trace on all 4 channels but sometimes they go away, Also the text/numbers at the top + bottom aren't always visible, they go to some electronics heaven but if I wiggle stuff, sometimes I get ti to stay on. Also, when I push the "beam finder" button, everything shrinks, so all 4 channels are about 2" long and the text is just small pixels - all in the center. Thanks for sharing and teaching here!
How are you, thanks for all your very helpful videos. Do you have any information about how to troubleshoot a 2465b and how to calibrate it?
The service manual is your best source for this information.
Ok, thanks again!
I want to get a used analog Tek scope in Australia, but gosh they are so expensive.
Hi. One question about the crt. How much better would be the micro-channel plate CRT in 2467(B) compared to the "standard" crt? Especially with those high bandwidth scopes. In anyway one would maybe wanted to spot some glitches and I was wandering if the u-channel plate would provide much more chance to see it...???
The MCP gives you a couple orders of magnitude faster writing rate - able to see single-shot events at 1ns/div.
A++
Hi mate. I was wondering if you have an opinion on whether you should operate your analog oscilloscope on no timebase mode (beam stationary) or any mode that would leave a constant electron beam on a single area. Will it burn the phosphor behind the glass? I purchased my analog oscilloscope last night and the seller has taken very good care of it and told me not to let the trace stay stationary. I believe him, I just don't know how paranoid I need to be and how many seconds/minutes before it will overheat. The model is a Pintek PS-605
It is difficult to say. A static dot can certainly cause damage. How quickly is a product of the dot intensity and duration (and the quality of the CRT). Best practice is to NOT have a static dot if possible, at least have it sweeping. And use the minimum brightness/intensity needed to get the job done.
@@w2aew Thanks mate. Sorry I was a way and didnt get a chance to reply. You are 100% correct. I finished reading through the manual and it says to avoid keeping the sweep too slow and only use high intensity when needed, and not for too long. Thanks mate. I'm learning from your videos
Helo Alan,it worth buyng a autumotive usb picoscope for ham radio aplication
Quick question. I'm assembling my electronics workbench (aimed at RF - primarily HF but it would be nice to cover up to the 70 cm band) and I need to pick a scope. Any suggestions that wont break the bank? As we are on the topic, a video on how to put together a instrument setup for RF test, repair and design without selling you kidney and first-born would be great!
That's a quick questions that doesn't have a quick answer. A decent scope is helpful. I like analog to look at RF envelopes, etc. Digital scopes add FFT capability for rudimentary spectrum analysis, as well as a ton of other features. Good RF power meter is typically needed. An RF signal source can be very helpful. Even an SDR based spectrum analyzer can be quite useful. There are a lot of amateur grade RF equipments (analyzers, VNA, siggen, etc.) based on small microcontrollers, DDS chips, SDR receivers, etc. that can be very useful in test/repair/design.
w2aew The RF power meter I did not think of. On the other hand I do fancy some of those TX test sets - Marconi has a model that is kinda ’afordable’ second hand. There are also some reasonably afordable simple siggens out there - also from Marconi. Also realized that the scope should have 50 ohm inputs. Anyways, thanks for the input.
Hi Alan,
Interesting piece of test equipment. I was wondering what they would cost, and a refurbished one goes for about $1300. 73 WB3BJU
You can often find 2445 or 2465 for under 400-500 dollars these days.
@@w2aew Mine was 15000 czk = $690 - bought from a service company after a refurb with a one year warranty. I bought it as a replacement for my 466 + 44 which was unfortunately stolen.
Thanks for the video, I'm smarter again.
Nice day 🙂 Tom
Thank you for this Alan. I've got a 2467B and had been trying to find out what other features I'm missing out on. This makes it so much easier. One thing I've also got to ask about the 2400 series is why does the ground terminal use a banana jack over the clip on method used today and on the cal signal on top for probe cal. Does it offer a dual purpose?
Gives you a way to tie scope ground to your equipment / circuit ground - especially useful for low frequency applications where you can then omit the probe ground connection.
Mine came with a little steel piece that has a male end for the banana plug, and the other end I can screw or clip onto.
Hi Sir I get 2465B from my dear friend ho died from cancer few month before... i have problem with oscilloscope and for legacy and memory i wont repair.. can you help me to fine manual and anther stuff... best regards..
Many manuals are available here: w140.com/tekwiki/wiki/2465B
hi, how to see power on hours and cycle counts?
Copied from another forum:
If you want to check how much the scope has been used, you can run the Diagnostic Exerciser EXER 05. It will tell you the total operating time and the power cycle count. Here's how you run this:
Press and hold the delta-V and delta-t buttons, then press Trigger SLOPE (while still holding down delta-V and delta-t). Release all buttons. Then press the upper/lower Trigger MODE buttons until EXER 05 is selected. Then press the upper Trigger COUPLING button to run EXER 05. You can exit the exerciser with the lower Trigger COUPLING button and return to normal scope operation with the A/B TRIG button.
@@w2aew my machine is baby... me2... in this field... i ask and they block me.. I do not why.. I read... ask... I just start print manuals PDF... HR ON 8116 PWR ON/OFF 2177 i just find weak spot is u800 like I have on board... :( i do not know what I can to do last longer...
@@zeljkoadzic1692 just make sure to keep the fan in good working order and always run it with the case on to get proper airflow.
Were these scopes aided by some CPU or it is just pure analog electronics? It's pure magic if it is.
While this family of scopes does have a microprocessor, the delaying timebase capability also existed in several Tek scopes that had no uP at all - pure elegant analog design.
Well its digital design too, the state-machine for the sweeping would have involved a variety of flipflops and gates to do the work.
I don’t understand why shortening the A sweep would help with B sweep intensity. If there are separate beams for A and B sweep, it shouldn’t matter. If one beam is drawing both, surely it can’t draw both sweeps at the same time - it must draw first sweep A and then wait for another trigger, delay and sweep B, so the length of sweep A shouldn’t affect the intensity of sweep B in this case either.
There's only one beam in these (and most other) scopes.
A bright beam is "blinding" the operator's eye in regards to the less bright beam. This effect is visible on the video. Else said: if you turn off the brighter beam, the dimmer beam is easier to see
Simple, a shorter A sweep makes both beams to be drawn more often and thereby brighter.
The scope only has 1 beam. It doesn't draw both at the same time but (I think, not sure) it does not wait for another trigger to draw the delayed B sweep. The incoming signal is fed through a delay line to get the delay. Meaning the exact position and portion of the waveform you select on the screen to be displayed as trace B is actually what the scope draws as trace B, it's that exact signal.
HAY
i don't have this kind of OSCILLOSCOPE
Can you please give us example(s) of circumstances wherein this particular tool would be more useful than a spectrum analyzer for instance?
google sucks: this is time base..... not frequency base :) two total different world.
When the clock is better then a pancake? Or.... car vs watermelon
As for example this NTSC signal with an Oscilloscope you can see how the puslses relate to each other in time, Vertical,Horizontal, signal etc where if you used a Spectrum Analyser you would just see the frequencies in the signal with no information on how they relate. Oscilloscopes display Amplitude vs Time and Spectrum Analysers display amplitude frequency.
I like to use it to find some event (B) which happens after some other event (A). If A happens a lot but I may need to see the one after B.
It is basically the analog version of the zoom features found on many digital scopes.