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Trash Picked Philips PM3214 Oscilloscope

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Look what I found on the sidewalk today! Of course, I couldn't leave this nice vintage Philips PM3214 oscilloscope behind. Watch me inspect the unit for the first time. Will it still work? Oh, the suspense!
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Опубликовано:

5 сен 2024

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Комментарии : 71

@felixcat4346 7 лет назад

I'm surprised your neighbors didn't have a yard sale. You are one lucky boy!

@JanBeta 7 лет назад

+Joseph Nicholas Thanks. I can only guess that nobody knew what it was (it's a rather poor neighborhood here). Luckily I fetched it before someone started kicking it around. :)

@Mikotti 6 лет назад

I found Philips PM3212 today and its working. It was laying in trash with VCRs, DVD players etc

@JanBeta 6 лет назад

Nice! I still don't get why people are trashing these fine machines.

@forevercomputing 6 лет назад

Jan Beta to me, trashing means to destroy

@jaycee1980 6 лет назад

well, it is destroying them if you put them out in the garbage..

@MrMaxeemum 6 лет назад

I was moving house about 2 years ago to the other side of the world, I had a similar vintage oscilloscope and decided to get rid of it rather than pay to get it shipped. I couldn't give it away. I tried some friends who were hobbyists and they didn't want it due to the size. Analogue oscilloscopes are absolutely fab, I ended up throwing it away, it broke my heart. I hope someone like you picked it up. just because it's old doesn't mean it won't do the job. That goes for people also.

@JanBeta 6 лет назад

Yes, I just love these old scopes. They are so well made compared to the stuff they produce today. And very useful for a lot of stuff, too. Hope your scope has found a new home. And you're right, it also goes for people. :)

@alphahr 6 лет назад

I just bought one of these off of EBay for $50 including shipping. Can't wait to check mine out when it arrives

@MichaelBeeny 7 лет назад

Lucky you! All I ever find in the rubbish is an old dirty chair or cabinet.

@JanBeta 7 лет назад

Apparently, I found it next to a big pile of broken furniture. When I found it, some people were already taking some lamps and looking through the other stuff. Luckily for me nobody knew what the scope was so I got it (they probably thought it was some sort of very obsolete portable television or something). :)

@Tool-Meister 7 лет назад

There was a rechargeable battery option for the 3212 & 3214. They are double insulated so are free from the mains ground. One of my all-time favorite low frequency scopes. I spent the entire 1970's working for Tektronix and NA Philips so had many to choose from.

@JanBeta 7 лет назад

Wow, didn't know about the battery option. I knew that you could power it with DC, though. Mine even has two banana jacks retrofitted to the back plate by a previous owner. It's a very cool scope. I hope I manage to get it back to its original glory. :)

@Tool-Meister 7 лет назад

there's a PM3217 on eBay for $50.00. I'd buy it, but I already have a 100MHz DSO and a really nice Tektronix 200Mhz 475 so it would strictly be nostalgia rather than a true need on my part....

@Anvilshock 7 лет назад

Hey Steven, would you happen to have any advice regarding a faulty power supply section of a 3214 then? The switching transistors in the oscillator part (V217 and V218 on page 90 in the manual, 2x BD237) become extremely hot after a short period of the scope running. Any pointers would be greatly appreciated. Thanks!

@Tool-Meister 7 лет назад

Anvilshock either the switching frequency is way off or there's a short down stream.

@Anvilshock 7 лет назад

Thanks. That would arguably have to be within the PS itself as it exhibited this behaviour even when fully disconnected, no?

@mimirbox 6 лет назад

I have the 50MHz version of this scope. It is probably about 35 years old now. It still works and it is still a good scope.

@JanBeta 6 лет назад

Yes! These are awesome machines from another time when things were actually built to last.

@campbellmorrison8540 5 месяцев назад

Excellent find, I think one needs both an analogue and digital scope. That scope will do most of what you need and what you put into it is what you see, unlike a digital scope. However a digital scope will hold the image and an analogue one wont so they both have their place in my opinion.

@JanBeta 5 месяцев назад

I agree! Analog scopes are better for some use cases indeed. I mostly use a DSO these days and have it set up on my bench permanently. The analog scope comes out whenever I work on analog circuits like audio amps or the like. Much easier to see oscillations etc on the analog one.

@cuentos.narrados 3 года назад

Really nice find Jan, i cannot believe it, i came here from the Argentinean "ebay", a guy is selling this exact model and he linked this video. The scope he's selling is not working and asking 1/3 of a monthly min wage lol. Greetings from Argentina.

@JanBeta 3 года назад

Wow, that's a steep price for a non-working 70s scope for sure. I got really lucky with this find. I guess it's down to the people who threw it out not knowing what it was. I'm definitely not living in a posh part of the town here. :D

@cuentos.narrados 2 года назад

@@JanBeta hey man i finally got a free fully working scope! it's really nice compared to my computer based one (6022be), i have to clean all the pots because it's really twitchy. so i came back to these videos and saw my old comment LOL.

@senilyDeluxe 2 года назад

I found a PM3305 digital storage scope in the e-waste two days ago. It basically works but it probably needs new capacitors as there's a weird modulation in brightness and focus. The digital portion has an entire 8085 based retrocomputer (8k RAM, 4k ROM) tacked to the side with 1983 date codes so it's probably one of the earlier models. It did blow up for the previous owner though (RIFA madness).

@VintageProjectDE 7 лет назад

Nice find! I absolutely love the good old Philips scopes. Unfortunately I never found one myself.

@JanBeta 7 лет назад

+Thilo Niewoehner It's not very often that I make such a great find. I have still some more cleaning and servicing to do on this one. Maybe there's gonna be another video.

@VintageProjectDE 7 лет назад

Jan Beta Well, dumpster finds are indeed extremely rare. I was looking for a PM3055 or similar models (I think there also was a 100MHz channel version of this series) on ebay, and finally gave up. The few you can find are too expensive for my liking, taking into account the usual faults they have.

@Jessterrr 7 лет назад

Lucky day for you. Never dealt with Phillips o'scopes but I suspect that you can get the user manual, maintenance manual, and schematics and calibration procedure for it just like any other brand of the era. Good luck with it!

@JanBeta 7 лет назад

+Jess Lewis Thanks! I indeed found all the manuals with little effort. There's a follow-up video to this one where I clean the scope and give it some more testing. Works pretty well although I didn't do any calibration yet. :)

@Jessterrr 7 лет назад

Jan Beta Those boards look intimidating with the components packed in so tightly. Its outstanding that you were able to save it. I have a scope but I still want better neighbors with better garbage.

@JanBeta 7 лет назад

Yeah, I still don't know why it was thrown out. Even if it was crusty it still works just fine. I can only assume somebody mistook it for some really old CRT TV or something like that (even though I would have picked that up, too).

@datacreed 4 года назад

I guess I should go trash-picking more often in my city. :)

@basileus9343 7 лет назад

Wow. I got a pm3212 and the vertical rotating switches are problematic, the amplitude and waveforms shape tend to change. Seems like you have the same problem on the timebase rotary switch. I cleaned my verticals with pencil rubber and lots of patience. Unfortunately i couldnt reach the rearmost contact without disassembling the metal shield around it and i left it as it is. Some v/div positions are still quite dodgy. I hope its because of the the contact i couldnt reach and not wear like some people told me. congrats for the find. ;)

@JanBeta 7 лет назад

+Basileus s Thanks, yeah some of the switches are really hard to reach properly. I still have a lot of cleaning to do on this scope. Works quite a bit better than in the video already, though.

@MiniWarzone 6 лет назад

What a nice find. I wonder who on earth was throwing it away...

@JanBeta 6 лет назад

I can only guess that someone thought it was some strange kind of obsolete TV set. I was really lucky to be the first person to pass by that identified it, I guess.

@GTI1dasOriginal Год назад

..ancient? You mean durable. Designed and built to last. Service friendly. Repairable. Those are the words you were looking for.

@JanBeta Год назад

I totally agree! It just also happens to be relatively ancient as well. ;) (That said, it still works to this day and served me well in several repairs in the meantime).

@romangloman6953 9 месяцев назад

Jan I also found this same unit in a dumpster. It also powers up. Here's the question, the power cord is not grounded. Any suggestions as to how to modify this to provide the ground protection? Thanks!

@JanBeta 9 месяцев назад

This model is not grounded to mains earth from factory as far as I can see. Mine doesn‘t have a grounded mains cable.

@airingcupboard 6 лет назад

Good video. Really enjoy your stuff Jan.

@JanBeta 6 лет назад

Thank you! :)

@eddiestocker4826 6 лет назад

Danke Sehr fuhr Ihre wichtige auskunft, es schoen war, Prima. Eddie.

@JanBeta 6 лет назад

Haha, sehr gut! :)

@eddiestocker4826 6 лет назад

Very useful video, I have one of these (not used for a few years) I switched it on and something popped and smoked inside but it still worked. I couldn't work out how to get the case off, those two screws in the back would turn a little each way then go tight, but seeing the video helped me understand why "as it is using captivated nuts inside". Anyhow, got it open and found that it was just the small mains suppression capacitor feeding the mains trannie, chopped it out and off it went, Vwalla ;o). Eddie.

@JanBeta 6 лет назад

Oh, cool! Glad this was helpful to you. I cleaned and restored mine to (nearly) its original glory now. It still works a treat. Very well made scope. :)

@fortnitegod2647 6 лет назад

Well some folks have all the luck. Great find there and working too. Its probably got nicotine in the switches. Good vid there Jan 😁....kim

@NuGanjaTron 4 года назад

"Captivated nuts inside" sounds like a pretty painful condition. ;^) It's also a nice catchphrase to rival those silly "Intel inside" stickers. Philips should have put them on these scopes.

@Anvilshock 7 лет назад

Got one, too. Sadly, the power supply is crapped, it switches on but eventually the switching transistors overheat (the ones to the left of the yellow capacitors at 1:57, with the round inductor and the 4 resistors inbetween) and the voltages go askew. Not sure how to go about this other than buy another one and either use that one instead or swap the power supply. Pity. It's a nice scope.

@JanBeta 7 лет назад

These were designed to have a rechargeable battery option, so it is probably quite easy to connect an external power source like a lab supply and power the scope from that. Mine even has retrofitted banana jacks in the back for that purpose. I would guess that it can be powered from either 12V or 24V DC to be useable from a car/truck battery. I didn't try that yet though. Repairing the power supply would of course also be possible if you can get matching parts (which can be a pain with transistors that old) but I think it's way easier to try to power it externally. I'll try to do that with mine later and comment again.

@Anvilshock 7 лет назад

Unfortunately it's not that easy. It's not the mains input that failed, the transformer part that is mounted on the removable backplate, providing about 27 V AC. What you see at 1:57 provides all the different internal voltages, the DC, the HV for the beam acceleration and deflection, even some sawtooth, if I remember correctly. It's like an old-school switching power supply, based on a locking oscillator. It's that section that has a flaw somewhere, and I don't know enough about it to have a go at fixing. Tested most of the discrete components already. Diodes are fine, resistors are fine, caps look fine, too ... already replaced the transistors ... Couldn't test the transformers yet because they're an absolute bitch to desolder.

@JanBeta 7 лет назад

Oh, you're right of course. Didn't realize that it belongs to the "second stage" of the power supply. That's definitely a pain then and very difficult to repair. If you don't already have it, here's the service manual (pdf): app.box.com/s/r497wc41hfh4s33t6bba1nqbsr0umlrl

@Anvilshock 7 лет назад

First thing I downloaded, mate. Thanks though.

@JanBeta 7 лет назад

Haha, ok. ;)

@Very_Dark_Engineer 6 лет назад

You is lucky finder. In our "world" trash looks much more ... real)

@kpaxxapk6397 Год назад

I got my hands on a very similar scope (pm3217), were you ever able to fix the knobs? I have the same issue.

@JanBeta Год назад

Yes, I made a restoration/cleaning video. The scope still works fine to this day after cleaning. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-B-Dvgs8XV1g.html

@kpaxxapk6397 Год назад

@@JanBeta thanks

@yoerim360 5 лет назад

recently bought one of these (50mhz version) cheap but missing probes. any tips on what probes would fit and other cables to get for it? ordered a modern rigol too but could't resist the old skool

@jaycee1980 5 лет назад

Pretty much any scope probes would work with this - you are best getting 10:1 probes rated for at least 50Mhz. Even the cheapy ones from AliExpress should be OK

@ParanoidFactoid 7 лет назад

Nice score!

@JanBeta 7 лет назад

Thanks! It is. I cleaned it thoroughly and it works absolutely fine now. Just used it yesterday to troubleshoot my C64. :)

@Kennynva 6 лет назад

People today dont think like me and you...the world is a throw away world, and very few people reuse anything...so this happens..I enjoy repurposeing electronic items...it just bothers me to see things like this thrown away...because I think of all the people and parts that it took to make this scope...and someone just throws it away..I just dont get it.

@cuentos.narrados 3 года назад

Like si venis de Mercadolibre jaja