Tektronix 465 oscilloscope gamble
Вставка
- Опубліковано 15 лип 2024
- I picked up this scope listed as "not working for parts only" for less than $50. Let's check it out. If it's a winner, it will become my main workbench scope.
If you'd like access to support the channel and gain access to bonus content, please consider becoming a Patreon here: / bandersentv - Наука та технологія
465B My favourite since 1975 !!!
Bob, I picked up a 465 a few months ago. I've heard about how good they are for radio work and I couldn't be more pleased! I got it from the original owner who was an electronics tech and he took very good care of it. Thanks for the great video!
I used this model when I worked as a bench tech at Tek back in the early 80s. They're great scopes. I now have a Tek TDS420 scope, and I think I wish I had a 465. They are simple, sort of, and work well.
I bought a TDS420 and it all worked for a while until the dreaded ACQ test failed. I started recapping, but something let the magic smoke out. Pretty sure it was the S87C751 (8051 series) microprocessor. Now i'm looking for a new Acq. board. Will the calibration be all off if I just change the board?
Have both the 465 and 200Mhz 475, over 20 years and no problems.
I just watched the video and realised that my new Tek 454 Time Delay Position knob wasn't working properly. The back dial portion was stuck and only the front dial/knob that you grab was turning. I just gave it a wiggle and low and behold, it's now turning. Subbed! Thanks!
You have two of them now, both working. Anything wrong with either one, you can fix through comparison. There's a ton of service info as well. You've got two working 465's. After watching the rest of the vid, that new 465 is perfect. Change out some of the caps perhaps. My Tek 422 is still running its originals and still works fine, still calibrated as well. It was built in 1966. Tek made their own parts back then - you may not really need to replace those Tantalums. Pull one out and test it. Happy scoping!
Nothing better to look at than a blue-filtered CRT screen in my opinion! Thing of beauty.
I have a Tek 465 and a 475 both partially working, along with a 7603 and a Sony-Tek 314. Also a Leader LS1020 as a basic 20 MHz tool.
It's a bit of a fetish with me. 🤣
Last year I junked 2 hitachi 21 inch superscans because I've run out of real estate and I regret it now. :)
I used to use one of those in the lab. The DSOs were new and pricey back then but there were a bunch of analog teks on the shelf.
Nice find for the money you paid, I am sure you will be happy with it. I have almost the same scope on my bench (it is a 475, the 200 MHz version). I worked at two different places that used these over my career and never had a complaint with them.
I still have one that we bought new in 1972. We serviced Advent Videobeam Projectors and this is the scope that Advent wanted us to have.
I would definitely suggest anybody get at least a dual-channel scope if they're going to be working on TVs. You can put one probe on a good copy of the video signal and use it as a good trigger. Whatever you touch with the second probe is then in perfect sync. For that matter dedicated TV sync modes are a plus for TV work.
I recently got a Tek 475 at a ham fest for free. It has a shorted high voltage multiplier, so I will have to rebuild that.
The scope was filthy, but all of the knobs and feet are still there.
I have a few, simple awesome.. TY sir!
Excellent find! They probably listed it as "for parts or not working" because they probably did not know how to test it, and it had been obtained by the seller in unknown working condition.
My 465B, 485, five 7603’s, six 77-78-79-71xx’s and three Tek curve tracers still run on their original caps. (I’m not a minimalist!) One scope “popped” what I suspect to be a tantalum, but doesn’t display any symptom. Not saying other units don’t need recapping, but they used good parts in that era.
Somewhere in cyberspace ... if my memory serves me... there's a vid of Stan Griffiths (W7NI, S.K.)... Tektronix legend, replacing a shorted tantalum, and bringing a scope back to life. I think it was even a 400 series. I'm with you on the capacitors. Tektronix didn't use consumer electronics grade capacitors, like you find in old radios and TVs. Tantalums were too expensive for that. If a tantalum shorted out, it's often a sign that something else stressed it.
I have one too in the B model that I need to service as well. I need a scope with a Z-drive which it has.
I loved my 465... R.I.P.
I like the old scope too, but just the depth alone. It just takes so much desk space.
But i like to do what you do with it, maybe i can repeat it on mine. Watched some videos on it after this and seems to be a lot of work to do properly. Apparently some transistors in the trigger circuits tend to go bad and have to be replaced, then clean everything. And then it should be calibrated, which i don't have the equipment for .
At least i learned from the video what the deal with the pull out time base button is. Never knew that...😂
Really not an issue as most of my other equipment is as deep or deeper. HP RF generators are monsters.
Might get my 465 out and work on it again. I tried to fix it and gave up on it.
Nice video on a 465 scope would like to have one maybe one day
Nice scope, I have the 2213A 60 mhz and it works great for anything I do but will probably sell it and get a 465. The 455 isn't a bad scope either.
455 is more reparable.... except it uses a Tektronix custom IC for the triggering. 2213A ... and all the 2200 scopes, are light, and have a nice display... but don't have the same quality as the 400 series scopes. If you have a working 2213A keep it.
Those look nicer rhen my old Hitachi V-212 wish I had a better one
I use mine every day.
I have a Tek CG-5011 calibration generator if you would like to use it, just take a drive up to madison wi
so I have a Tektronix 475 with DN 44 I got very cheap, I found acme revival but is still feel unconfident with sending it out to the.
I can get the beam spot to shin but not more than that.
/ 85 per hour and a flat rate of 89 if no repairs are done but if its less than it cost its the best option I have.
it will also have to be shipped over 1200 miles, I guess I'm just looking for an excuse to fix it some other way.
I can say I don't think anything is smoked or popped.
That's tough considering you can get a working one for around $200. Try fixing it yourself to save money.
Well, I know I'm woefully ender qualified or equipped to make quality repairs. And don't even fully know its capabilities yet I saved it from going in a dumpster and am glad to report back that I did get the calibration to show its trace today.
Youtu video have made me concerned that some old components may just self destinat in this old machine with almost sertan known components.
Nice..so are you saying that if you have a 465 scope without the original probes you cannot get 10x with after market probes ?
PeaceFromOz.
Oh the probes will still be x10, but the knob setting will be off
Tek 465 very serviceable... try to get the tunnel diode for the sweep generator.
I don't follow. Tunnel diode for what sweep gen?
@@bandersentv Tunnel diodes are used in the 465 A/B Trigger Generators, which are part of the triggered sweep portion of the horizontal sweep generator in the 465.
Very disappointing to see you putting the scope "face-down" on the ground 🙈
I think the button on the probe connector is only used with on-screen display scopes so machine will know if probe is in direct or low capacity/x10 position.
It has an effect on what positions are available on the control. You can't use the upper ranges if it is not present
@@bandersentv The pin is on the 10X probe. It only illuminates the lamp., on the higher voltage settings. 465 is 5 V/div max, with a 1X probe connected. All the pin does is indicate you are using a 10X probe. (You can still use any 10X probe, without the ring pin, and it will be 50 V /division. 1/10 of 50 is 5.) See the specifications for the 465... it's 5V/div max.
@@willthecat3861 Thanks for the clarification. Nice to see the proper range illuminated though. Also, I see real P6105 probes are pretty cheap these days.
@@bandersentv Yes... often one or more of those little incandescent range indicator lamps are burned out. It's a real PITA to replace them... If I remember, you have to take out the vertical board, and open the attenuator? Anyway, that's a plus, that they light up, on yours. When ever I using a 465, I like to see them too.
Video signals with digital scopes, especially early ones - yuck! Now when you got digital video signals (like from an 80s arcade machine), unless you get the timebase /just/ right, you can't even make out that it *is* a video signal. On an analog scope, I can see that it's a video signal at a glimpse, even if the timebase is way off.
My workhorse scope is a Tek 7603 with vector graphics OSD.
(on the plus side, my late 90s HP scope has an almost arcade exact port of Centipede as an easter egg)
There must be a solution to that. Do they even sell analogue scopes these days? If not then certainly it is possible to get a video signal nicely on a modern scope.
@@bzuidgeest From what I've seen, modern scopes are no problem. I was talking about late 90s digital scopes.
@@senilyDeluxe i see, they have come a long way
Oh no... you didn't remove the case by putting the 465 controls down... without any padding/foam/pillow. That's 25 pounds on plastic knobs, and control switches. Who does stuff like that.
No, the weight was on the handle
@@bandersentv The blue protective cover that came with these is used when removing the case. I know most often they are missing.
Thanks, I'll try to find one. I saw a guy on FB 3D printed one.
@@thomaskitz1185 No. That's plastic... and that's how most of them get broken. Foam or pillow... it's not rocket science... and everyone has a pillow? No?
@@bandersentv Hi bandersentv.... me thinks at 33:35 there's no handle (with the case removed) ... and unless it's a magic trick... your resting the scope on its face. That's a 465 no no.
Sorry..... Affordable ???
these things are in the order of $400 - $600 WITHOUT SHIPPING
Where the heck are you looking? Go to eBay where I got this. Many under $100. Do not pay over $200 for one unless it is mint and fully serviced
@@bandersentv
Where am i looking ?
OK
Ebay
Gumtree
Facebook Market Place
EEV Blog Forum
as for 465's there are only 2
All above the price that i'd be willing to pay for them
as for the rest of the cro's
Most of them are shit
Honestly i'm asking myself, why is there is a CRO shortage
Don't get a 465, just because you see it in the vid. These are quite old now (some from 1972!) The 465B is circa 1980. These are for people who like to fix oscilloscopes... way more than they like to use them.
Dunno about that. I've been using my other 465 off and on for 20 years without any repairs. This one seems to work fine as is.
@@bandersentv Yes... they work until they don't. (... like a lot of older Tek gear.... like a lot of older gear period.) 465 were well made; but, they are starting to get too old now... especially, if they have high hours on them. They can be quite challenging to repair, especially if they develop trigger problems, or H.V. problems. If the CRT, or the power transform go, it's not a fix... it's parts. For the stuff I see you do on this channel, people wanting to do it too, don't need a dual time base, delaying 100 MHz oscilloscope There are plenty of 10, 20, and 40 MHz analog scopes that are much easier to use, and that people will actually use. IMO, leave these for people who actually need them.
Wrong channel for me , i hat this sabe tudo guy
Try Mr Carlson's Lab