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Sweevo posted:You can almost certainly still get ribbons. All three settings would strike on the ribbon.
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Aug 3, 2022 13:54
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Crosspost cos I can't remember where I post LD stuff half the timeHumphreys posted:More Laserdiscs today!
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Aug 3, 2022 13:57
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Phanatic posted:More finds from my mother’s basement. Word of warning: the capacitors on old C64s can dry up, and if you plug one in with broken caps, you can brick it. The PSU is dangerous too, as it can start to produce a higher voltage than 5V as it gets old. A bad PSU frying the chips is a known cause of bricking for C64s. If you want to try your old computer again, there are some things you can do to make it safer. Just check a retrogaming thread a C64 forum.
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Aug 3, 2022 14:46
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I try to keep my collecting impulses under control by asking myself if I'd actually use it, and if not, is it somehow cool or unique enough to have for its own sake. So far, everything in my collection gets regular use except for the Edison cylinder, which was worth the ten bucks as a conversation piece.
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Aug 3, 2022 15:12
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CoolCab posted:i always find these kind of impulses a little sad because CRTs go bad, phosphors have an operational life. afaik no one has been making them for years and all the institutional knowledge and manufacturing equipment etc is long long gone. people will continue to hunt down the existing stock and run them until they fail, but that will happen eventually and they cannot be replaced. lovely CRTs were being made later but the high end stuff people want, the trinitons etc, were long long gone by the time they died. our generation will probably be the last to enjoy the technology, which despite being obsoleted for any number of practical reasons still haven't caught up in some ways.  I have two nice early 2000s CRTs that I didn't even pay for that I would like to keep using while I can. Eventually it's going to die, but so am I.
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Aug 3, 2022 19:24
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btw we have a brand-new CRT thread over in Retro Games. Come PYF 90s or early 2000s gaming CRTs https://forums.somethingawful.com/showthread.php?threadid=4007338 I need to dig my old KV14LT1 out of storage, it was fantastic for anything Dreamcast or older
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Aug 3, 2022 20:24
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axolotl farmer posted:Word of warning: the capacitors on old C64s can dry up, and if you plug one in with broken caps, you can brick it. The PSU is dangerous too, as it can start to produce a higher voltage than 5V as it gets old. A bad PSU frying the chips is a known cause of bricking for C64s.
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Aug 3, 2022 23:46
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Which reminds me that I have an ABC 80 sitting around - so slightly older but probably very similar problems. And the PSU is integrated into the monitor with signal and power over one weird plug. And it's way more niche, so it doesn't have the same sort of aftermarket. Still, I want to keep it working. I should probably find out if there are anyone anywhere that restores them and what they charge.
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Aug 4, 2022 04:50
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Computer viking posted:Which reminds me that I have an ABC 80 Cool!  There are knowledgable people in the facebook group Retrodatorer köpes/säljes/bytes who can help you. It's a really nice group, and mostly discussion rather than trade.
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Aug 4, 2022 09:56
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This is where Cockroft-Waltons are generated. https://twitter.com/ValerieH137/status/1555201410312052738?s=20&t=hPr09GHA9LuUHCAAstUbXQ
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Aug 4, 2022 17:24
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Gromit posted:I've had these in my cupboard forever, but they are both too small for me to ever bother using. Espresso cups? https://twitter.com/flexi0n/status/1555132026814078978
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Aug 6, 2022 14:46
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weird coincidence
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Aug 6, 2022 18:11
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Oops...
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Aug 7, 2022 13:17
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Did you feed it after midnight?
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Aug 7, 2022 16:07
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CRT chat! I have two color CRTs sitting around. First one is a very nice Sony Trinitron TV/VCR combination. The colors are super nice. It sees occasional use when i'm repairing old consoles or am checking out old video tapes.  Why yes, that is indeed a WM-D6 that just so happens to live next to it. The second one is a big old IBM PC monitor. I think it was a really good one, definitely the heaviest one we had. It has not been in use since 2005 or so. It's not really in the way, just quietly sitting there for that one day i either have the space to set up a full vintage PC setup, or when i feel like testing it and selling it in a time when most CRTs have been thrown away or broken/are unrepairable.  For a short while, i also had a B&O wide screen CRT tv in 2020. When i was a mailman, i saw it sitting on someone's porch. At that moment in time, i had space in my own apartment to put a TV, so i asked if i could have it, and i could. It worked perfectly, super nice colors although not as good as from the Sony. But the big picture made up for that, and it was pretty sharp too. I hauled it to my apartment with a cargo bike, one of those big traditional 3 wheel dealies. But when i got a divorce, i had to get rid of it because of a lack of space at my new place. Still kinda sad about it, it really was a great example of late, almost high end CRT tech. Aside from that, i have a beautiful Graetz Landgraf B/W radio TV combination. I am not a TV repairsman. I managed to get it working, but not exactly to its fullest potential. Whenever subtitles (or something else 100% white) appears on screen, all dim/shadowy things turn completely black.  not my picture. It's a huge thing, weighing 30 or 40kg or whatever. It's sitting on my floor, and the top of the cabinet is high enough to function as a table. About 60cm or so. It has tremendously big and good loudspeakers in it, so it's awesome to use as a radio too. I grabbed this one, because it was A. free and B. the biggest black and white tube TV i've ever seen. Really a top of the line model.  this is my picture. The image is razor sharp but it's kinda hard to make proper photos of a CRT. In real life you can see the individual scan lines. The issue with this thing is that it is too big for me to move by myself. If i want an old TV tech to look at it, i somehow have to load it up and take it there, and the people who still fix these (they are around, you just gotta know someone who knows someone) are kinda too old to help loading/unloading it, and so are my parents... I almost managed to snag a CRT tester from someone who 'wanted it to go to a good home or a museum' so i offered a couple of tenners and got laughed at. Stupid fucker, don't think for a second that museums are gonna pay *any* money for it. I wanna know how good the CRT is before investing any more time into it. Spare black and white CRTs definitely are starting to become more and more rare. The ones still around are all used, so you never quite know if it's a better one than you have. In any case, using an old CRT TV on occasion is not bad at all. Those tubes last quite a long time, easily 10.000 hours. If you use it occasionally on the weekends for a few hours, you won't be putting that much extra wear onto them. LimaBiker has a new favorite as of 19:17 on Aug 7, 2022 |
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Aug 7, 2022 19:09
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Niiiiice. I saved my parents 32" Panasonic. At the time it was the bees knees though it lacked SVideo. It has an annoying coil whine that gives me a headache after about an hour but I haven't been able to part with it yet. I'd love to just have a 7 ton 18" Trinitron or something more svelte.
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Aug 7, 2022 19:13
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That coil whine will disappear in 10 years or so. Or rather, you'll become unable to hear it. I have one ear that still hears the 15625hz scan frequency, and the other just doesn't. I'm 30 right now. Anyway, happy to hear someone else also has a heart for big old CRTs. I get the impression that it's now mostly the small 37cm ones that are surviving, because those are still somewhat easy to put somewhere. But those big ones are really part of the furniture in your house.
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Aug 7, 2022 19:18
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LimaBiker posted:Aside from that, i have a beautiful Graetz Landgraf B/W radio TV combination. I am not a TV repairsman. I managed to get it working, but not exactly to its fullest potential. Whenever subtitles (or something else 100% white) appears on screen, all dim/shadowy things turn completely black. When a scene gets really dark, does the image also get really muddy and low-contrast? If so, this behavior is probably just a design flaw of your set from the factory. On older B&W CRT sets the manufacturers would design them to do their processing only on the AC component of the video signal. That's mostly fine except it loses the reference to absolute black/white (which is the DC component of the signal) so the brightness/contrast controls end up being relative to the brightest part of the current image instead of being fixed to the full potential range of the video signal. More expensive and newer sets had a feature called "DC restoration" to restore the DC component of the signal after processing which mitigates this issue. You might even be able to mod that in to the set depending on how the video circuitry is designed. Mr.Radar has a new favorite as of 19:36 on Aug 7, 2022 |
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Aug 7, 2022 19:33
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Sorta. When i set up the TV with a picture of a shadowy scene without bright whites, in such a way that there's good detail in the shadows, the detailed shadows turn black when subtitles appear. Conversely, when i set up that same scene with the subtitles in screen so the shadows still show good detail, when the subtitles disappear the full blacks become grey, sometimes up to the point that flyback lines appear if i've cranked up the brightness a lot. The image size varies slightly, but not a lot - so i reckon the beam current doesn't cause the high voltage to sag. Full circuit diagram is in here, page 8: https://nvhrbiblio.nl/schema/Graetz_F39.pdf It would help me a lot to know if there indeed is no DC restoration in here. I know what it is, but i don't quite know how to recognize it. It does have 'regelspanningerzeugung', a control voltage system but i can't see if that's a AVC thing to regulate the amplification of the IF and RF stages, or whether that's something completely different. I kinda think it is meant to regulate something brightness wise. As far as i know, the contrast knob adjusts video amplification in the IF stages, but it's been a while since i really dove into the circuit. At least that was something that made me go 'Huh, that's an odd way...' Block diagram: 
LimaBiker has a new favorite as of 19:50 on Aug 7, 2022 |
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Aug 7, 2022 19:46
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I had a 32" flat crt trinitron that i bought in '02 or '03 and i loved it to death. I think it may have done 720i over component? I don't remember. I planned on keeping that thing forever and playing nes / snes on it but unfortunately it only lasted about titties has a new favorite as of 20:15 on Aug 7, 2022 |
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Aug 7, 2022 20:01
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titties posted:I had a 32" flat crt trinitron that i bought in '02 or '03 and i loved it to death. I think it may have done 720i over component? I don't remember. I also had one. It was great but huge and heavy. That was also the last TV I owned. Since then I've only watched and played things on computers.
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Aug 7, 2022 20:23
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Yeah my SGI coffee mug doesn't fit into my R4k Indigo at all.
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Aug 7, 2022 20:32
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On the whole? Nah. Collectors and historians can keep the CRTs. Old games on LCDs doesn't bother me enough to trade all the advantages of modern screens for a heavy brick of a monitor. Even if I dearly miss degaussing my screen.
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Aug 8, 2022 00:04
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One thing I don't miss is coil whine. I'll gladly put up with the vagaries of LCD to not ever hear that again.
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Aug 8, 2022 01:08
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Kwyndig posted:One thing I don't miss is coil whine. I'll gladly put up with the vagaries of LCD to not ever hear that again. I used a wireless charger pad for my phone all of two nights because of the coil whine type noise whenever it was working, and also stopped using a nice little power strip for the same reason. I just can't loving stand it.
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Aug 8, 2022 01:19
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* walking into a room to check out AV issues* "Hey the front office said -*hears the lighting system buzz* - holy poo poo do you live with that noise all day?!" *Looks at me like I'm crazy*
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Aug 8, 2022 01:22
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https://twitter.com/tcjennings/status/1556133914246348803?s=20&t=tRUunlGFfFp2-k2cfwQWCA
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Aug 8, 2022 02:14
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Dick Trauma posted:Did you feed it after midnight? No I fed myself too many beers and was on Japan Yahoo Auctions
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Aug 8, 2022 02:48
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One set of my grandparents bought a nice huge house in the 1950s and after the kids moved out, they didn't need half of it, so everything pretty stayed in statis for the last 30 years they owned it. Everything was kept clean, but nothing was ever added or removed, including dead teleivisions. When they finally downsized and sold everything, I grabbed the smaller of the dead TVs. After a certain amount of time, it's not junk but vintage, right? So I own a useless but interesting display piece that is a 1962 Sylvania. Here's an ad for one:  My grandparents also forked out the money for the stand, which I have as well. I've never plugged it in. I'm dumb about electronics and lack the boldness to try to open it up and check/fix the power source or the 60 years of dust sure to be in it.
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Aug 8, 2022 02:59
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That TV predates 1968, so radiation will be a factor.
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Aug 8, 2022 03:31
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watch out for vampires
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Aug 8, 2022 03:32
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Primary concern with electronics that old is the capacitors are probably leaking or dried out, or any vacuum tubes have leaked.
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Aug 8, 2022 03:36
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MRC48B posted:Primary concern with electronics that old is the capacitors are probably leaking or dried out, or any vacuum tubes have leaked. If the vacuum tubes leaked, I think they would just be tubes.
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Aug 8, 2022 04:55
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Depending on the availability of parts (I know some Russian guys were selling working vacuum tubes a while back) you could get it working again if it is dead. But that's getting real deep into the hobby of repairing CRTs.
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Aug 8, 2022 05:04
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There are probably factories in russia or china still making new manufacture clones of tubes designed about that time. Quite a few types are still in production for use in audio equipment. Got have that "warmer" sound response curve
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Aug 8, 2022 05:43
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Cojawfee posted:If the vacuum tubes leaked, I think they would just be tubes. 
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Aug 8, 2022 05:54
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I thought mp3 cds and their dedicated players were outdated and failed, but there was one for sale at aldi today:
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Aug 8, 2022 08:27
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VictualSquid posted:I thought mp3 cds and their dedicated players were outdated and failed, but there was one for sale at aldi today: Somewhere TechMoan is lurking around ready to buy one for a review.
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Aug 8, 2022 09:06
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VictualSquid posted:I thought mp3 cds and their dedicated players were outdated and failed, but there was one for sale at aldi today: this type of unit is a lot rarer than they used to be- my mother in law keeps one in the kitchen and when the previous one died a few years back there were about 2-3 choices available total she had to give up on having a cassette deck on it too
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Aug 8, 2022 09:12
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MRC48B posted:There are probably factories in russia or china still making new manufacture clones of tubes designed about that time. Quite a few types are still in production for use in audio equipment. Got have that "warmer" sound response curve RF frequency converter and most IF tubes are not made anymore, not anywhere. It's all audio stuff not usable in televisions. Even the audio tubes are usually not usable for TVs because TVs mostly use series chains for the filament voltage, which means they have a completely different filament voltage then comparable radio tubes. However, the sheer number of tubes manufactured (hundreds of millions, if not a couple billions) up until the late 1970s is enough to make sure that there is no shortage of RF and IF tubes for TVs, even though they have been out of production for decades. I can still just spend 40 euro at a webshop and have 10 fresh TV-specific tubes delivered to my door. Pre-war power tubes are getting scarce, and so are some 1960s FM broadcast reception tubes like the ECC85 because they were ran hard and used a lot by people who still listen to FM broadcast today. I have 2 or 3 sorta usable ones, but i also snagged a bunch of brand new, super cheap PCC85s which is the TV equivalent with an odd filament voltage. Modern electronics, however, means that you can easily put a little inverter below the radio chassis and run it with a TV tube. The reverse - running radio tubes in TVs - is much harder. Also some of the highly specialized tubes from the death throws of the tube industry, like the ECLL800 (phase inverter, dual output penthode) that have been produced only for a handful of years and had a short life span because of putting in 2 output penthodes in a tiny tiny balloon, are almost unobtanium. But those can often be replaced by a random ECC tube and 2x EL95, if the radio has physical space for it. So in general, some specific tubes are hard to get, but in many cases the ridiculous number produced and stocked means that you can almost always find a replacement. LimaBiker has a new favorite as of 11:26 on Aug 8, 2022 |
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Aug 8, 2022 11:20
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