EWD Celle is the old Telefunken factory in Celle, Lower Saxony. EWD is Electronic-Werke Deutschland. They closed somewhen in the 90s.
@mattstvbarn
7 ай бұрын
Ahh. That is a fantastic bit of insight. I had googled it to no avail! The unit appears to have come from the Helmut Singer company via a shifty looking Polish website. An interesting journey!
@eduardocarvalho1547
7 ай бұрын
@@mattstvbarn If you google "ewd celle" you should get 2 articles in the first page, one from TAZ and the other from the Spiegel, both from 1988/89, regarding the closure of the factory. I can't post the links since yt deletes it.
@algemeennut6683
7 ай бұрын
@@mattstvbarn wikipedia about Telefunken factory locations does mention it, though one needs luck. I just googled Fernseherwerk since I knew Celle to be in Germany, and that produced Telefunken alright.
@der.Schtefan
7 ай бұрын
@@mattstvbarn If you want more info: The Telefunken factory in Celle opened in the 1960s. Along the years many manufacturers basically did what Boeing did with "Spirit Aerosystems" by spinning of the factories into separate companies, much like nowadays most European white-ware from all manufacturers comes from one factory in Czechia. In 1987, NEWEG (Telefunken Celle) and DEWEG (fused together via many routes from the "Nordmende" brand factory) merged to EWD. Your unit is thus from the old Telefunken factory in Celle, which at that time was then merged into EWD Celle. To my knowledge they closed end 1992. So this unit was in use somewhere between 1987 and 1992 in Celle. If they had it pre 1987 and changed the text, or bought it then, is unclear. Nowadays the only thing that remains is the Telefunkenstraße (Telefunken Street) in Celle, leading to only a DIY store, furniture store, etc. You can find info in German on the Celle newspaper archive behind a paywall, the German Wikipedia burried in some articles regarding Normende, and the German company registry in Freiburg.
@mattstvbarn
7 ай бұрын
@@der.Schtefan interesting bit of history. It feels more special now. By the way I have another generator from Germany which says DTB VILLINGEN. Any idea where that might have come from?
@ThomasSchuhmacher-tm6xf
7 ай бұрын
Thank you for this video. I felt transferred to the mid 90's, when I startet to work at Philips video recorder development and production plant in Vienna, Austria. (At this time the company was called ir3 (international reception recording replay) founded by Philips and Grundig). We had some of the pattern generators in the central transmitter room for the production test lines and some in the laboraties where we designed new vcr's and their features. And you are right, the bars left and right are for testing the PAL (phase alternating line) colour system. When you are familiar with the system, you can see if your settings of the PAL decoder are correct (then the colours should be very dim) or not. Pah, that was long ago....
@mzflighter6905
6 ай бұрын
Whoah! What a nice story. Could you share some more details about developing VCRs?
@mattbailey1515
7 ай бұрын
Great Video! As an enthusiast of old tech, analog TV isn't something I've ever looked too deeply at so I found this really interesting. Also, the production value of this video is right up there with channels with half a million subscribers or more. Wishing you all the best, and I'm glad the algorithm brought me here, you have a new subscriber
@bayareapianist
6 ай бұрын
Back in 80s, my brother and i started making a simple B/W patern generator to fix and de gauss the CRTs. These machines were incredibly expensive, as much as an apartment. Later i tried to add a SRAM to add text and geometrical shapes. But my C64 came around and i stopped playing with electronics 😅
@steenhansen8
6 ай бұрын
The Danish team (Philips PTV, Philips Proff Television) was located in Copenhagen. I worked there briefly early in 1983.
@mattstvbarn
6 ай бұрын
Amager? Would have been cool to set foot inside that place!
@steenhansen8
6 ай бұрын
@@mattstvbarn Amager, yes. A part of the Copenhagen area. It was a cool, albeit very old-school place but super clever people and a great atmosphere.
@robvandeschepop8595
6 ай бұрын
The mysterious youtube selection mechanism gave me this video in my recommended list. This TV pattern brings back memories of my youth. I grew up in the 60's with black and white tv as my parents already had tv in the 50's. In '68 my dad bought a (Grundig?) colour tv because end of '67 the Netherlands switched to colour tv transmissions.. At the time tv transmissions only started 18i:45 with this pattern for 5 minutes, followed by 5 min a blank and white clock, and 18:55 a childrens program (Pipo de Clown, later de Fabeltjeskrant). From the 70's onward, during the day sometimes on of the two nets would transmit this pattern (or the PM5544 pattern) during the afternoon. In 1985 I started to work for Philips T&M Almelo. this site was later taken over by Fluke, Pemstar and now Benchmark. From the mid 90's onward I've been involved in developing the Philips/Fluke scopeMeter series (123, 190 series I, II and III). Some models are equipped with TV triggering and in order to test this I had a PM5518 on my desk. Thank you for the video!
@slypig24
6 ай бұрын
I found this episode very interesting. thank you for sharing your knowledge.
@dennisdecoene
5 ай бұрын
I have no idea why I found this interesting but I did!
@renejensen5656
6 ай бұрын
Ohh, bring back memories. We had 2 of this units for our station id for many years, and also ITS inserters from Phillips, we had the TXT and clockoption in both of them. Have repared them several times. We later exchanged the units with the 1RU PTV versions, and when we builded our new facilities we had the DK Technologies 1RU unit. The main reference are the colorfreq on 4.443361875 Mhz that are the base for the 15.625 khz horizontal osc and the 50 hz vertikal osc. The main Xtal osc need at least 1 hour to heat up.
@torsj42
6 ай бұрын
Great video! Just a detail: I think the yellow strips on the b&w control board supplies both ground and 5V. The strip also function as a distributed decoupling capacitor for the power supply to all the TTL chips.
@echelonrank3927
6 ай бұрын
what the strips do is make a low impedance path to a real capacitor elsewhere. the actual capacitance of the strips is almost nothing.
@whitcwa
6 ай бұрын
@14:40 15734.264 is for NTSC. PAL is 15625. The counter reads high because of vertical serrations and equalizing pulses.
@denelson83
6 ай бұрын
If your horizontal sync frequency is 15.734 kHz, you are dealing with an NTSC signal. PAL's horizontal sync frequency is 15.625 kHz. So you have a sync frequency from NTSC with a subcarrier frequency from PAL. Very weird. The CBC in Montreal also used the NTSC variant of this type of Philips circle pattern generator, with several modifications: The colour difference "ears" on the sides of the pattern were replaced with colour difference "bars" next to the edge castellations and _behind_ the grid, -(R-Y) on the left and +(B-Y) on the right. The six-step luminance staircase was replaced by an eleven-step staircase, modulated with 180° colour burst, and instead of five frequency gratings, it used six, like the BBC's Test Card G, but with sine waves of 0.5, 1, 2, 3, 3.58 and 4.2 MHz. In the reflection check strip below the top text box, there was an extra bright pulse on black next to the existing dark pulse on white. Finally, the text in the top box said "MONTREAL", and in the bottom box it said "SRC/CBC". Here is the Montreal test pattern in its full glory. kzitem.info/news/bejne/yIBs1HWYbH-ml34 (Everyone seems to forget about Canada… 😅)
@MissNorington
7 ай бұрын
21:15 ... I feel that pain! (Awesome and informative video as usual)
@GothGuy885
6 ай бұрын
very interesting! I like that all the different circuits are modular, so if a problem were to arise, it would just be a matter of powering down, and popping a new module in its place. rather then everything on one PC Board. which would be a nightmare to do diagnostics on and repair. I liked and Subbed 😀👍
@625line
5 ай бұрын
I have a Original PM5544 Generator from BASF Factory in Ludwigshafen.
@whitcwa
6 ай бұрын
@39:35 Those strips are not just ground busses. They are also decoupling capacitor strips.
@telocho
6 ай бұрын
I can add the following experience watching the test pattern in The Netherlands. Like in many countries, the transmitters are operated by the ptt (government post&telephone company). So there are in fact two pattern generator per network: one from the ptt (who did the most hours per day) and a pattern generator from the main control at the broadcast institute, which usually was on air maybe ten minutes before a start of regular programming. The main noticable difference between the two patterns is of course in the text: the ptt would say "ptt- ned.1" for instance and the broadcast switching center would have "nederland 1". But, there are more differences. I have observed that until the eighties, the caption was in small letters, not in capitals. In the mid eighties it changed to capitals. It must have been a decommissioning of the PM5544 and switch to a PM5534? Second: the circle of the later version was more perfect round, the original seventies one had less anti-aliasing (vertical and horizontal resolution), so clearly a more crude circle raster was put in the eprom. Last but not least, a clock was never used in our broadcast generators. I presume, each transmitter had it's own PM5534, second one for spare, and there were around 10 transmitters to cover the country with three channels each makes around 30 units. And the broadcast controller one was at the AVVC Hilversum, another six (two per channel). And a couple more I presume as standby units here and there. Cable companies also used it on off duty channels with their own ident, since most transmitters shut off after the last transmission until the morning, must be at the head end.
@mattstvbarn
6 ай бұрын
@telocho Quite a range of different generators was used in the Netherlands. PM5534: www.vintage-radio.net/forum/attachment.php?attachmentid=58738&d=1321553581 PM5655: kzitem.info/news/bejne/mo2v0npjcpWajY4 github.com/inaxeon/PTV_Preservation/blob/main/PM5655/Images/nl3.jpg Tektronix TPG-625: kzitem.info/news/bejne/2XhvyWuefaSgmaQ Ah yes then there is that one with the tiny text (not sure what it is, probably non-Philips - possibly an old ShibaSoku but yet to confirm it): kzitem.info/news/bejne/yXeOp5-Aj3ZyjYo As for the actual PM5544 I have not come across a definitve recording of it from NL yet.
@telocho
6 ай бұрын
@@mattstvbarn Yes... there was a PM5534 for sale last weekend which a sticker on it 'nederland 2 reserve" or something alike, must have been the one saved from the Lopik transmitter since it was sold by the broadcast museum there. The ptt ofcourse had to re-adjust business after privatisation and maintanance of the transmitters went to nozema, that is why most nineties recordings have nozema in the top black bar andnot ptt. The one coming from the studio/broadcast company would not have the nozema logo. The weird small logo was used in the late seventies at least and part of my earliest memory as a child around that time.
@mattstvbarn
6 ай бұрын
@@telocho oh yes. I have an item from that sale which will be demonstrated in future. I heard the PM5534 wasn't sold in the end.
@GeraldBastelica
6 ай бұрын
Very intersting video. What is the EPROM programmer you are using?
@mattstvbarn
6 ай бұрын
For which EPROM? There were two in the video
@GeraldBastelica
6 ай бұрын
@@mattstvbarn For one, one can clearly read it is a Dataman-48UXP. So my question is for the other, with a shark drawing on it.
@ocsrc
6 ай бұрын
I used to work at a Satellite Relay Center and I would have to schedule time on the satellites for different users and I would have to put up test cards and " head and tail " feeds I HATED WHEN THE PHONE WOULD RING I had so many jerk that would call the control room TOC problem line number I had on some of the feeds. Especially if it was a controversial figure doing a " Satellite Media Tour " The absolute worst one was Howard Stern So many jerks calling the problem line and I would have to spend time listening to them and I would ask for their ID and then they would say something offensive and I would hang up. This day the roll over lines were full and it rolled out and called the manager and I got called on the emergency line and I hated that line ringing because I knew it was one of my 30 bosses. And he was yelling at me like I was not answering the phone. I told him what was happening and I was getting thousands of calls and hour on the problem line I actually had the urge to put the private line for calling the site where the broadcast was originating and let him feel the hell I was going through, but I didn't do it. There were a lot of really cool things that I got to see working there. I miss those things.
@harrymartin1661
6 ай бұрын
This was SABA, Celle near Hannover. EWD was coming from SABA after 1986, they changed often the name after selling it 1981 to Thomson and 1986 to Telefunken... long history and very complex.
@mikeselectricstuff
6 ай бұрын
39:37 I think those strips may be busbars carrying both ground and supply, and have internal capacitance for decoupling
@mattstvbarn
6 ай бұрын
That you have time to watch a small channel like this at all, let alone 39:37 of a video... I salute you!
@mattstvbarn
6 ай бұрын
I had another look. The bottom strip is just a ground, but the middle and top ones appear to be two conductors sandwiched together. Sounds like a decent theory!
@musicfreakcc
6 ай бұрын
30:08 Here's another North American Philips pattern. This one is from CBC/Radio Canada Montreal. kzitem.info/news/bejne/yIBs1HWYbH-ml34
@mattstvbarn
6 ай бұрын
That is quite an interesting one. Looks like a PM5534 which has had a number of modifications...
@TTVEaGMXde
7 ай бұрын
Telefunken had a Factory in Celle. Germany, Lower Saxony
@lucasniebling7336
6 ай бұрын
It should be Electronic-Werke Deutschland GmbH (EWD) in Celle from 1987 to 1993
@LeoStarrenburg
6 ай бұрын
Aah, the Philips grey 'PM' lab equipment ! Set up next to an SUV-sized Tektronix on the trolley and not a single computer in sight as the PDP-11 was in it's special room. I can see it as if it was yesterday, those were the days ...
@LiquidAudio
6 ай бұрын
What a lovely old piece! I have quite a bit of older Philips test and measurement equipment, my favourite is probably my PM6654C high-resolution counter.
@MartinE63
6 ай бұрын
An interesting video! I’m vintage enough to have used the commercial grade PM5518 to test monitors in the 1980’s. I’ve also come into contact with the 1702AQ EPROM, the latter being used in a Ferranti SCADA system originally designed around 1977 or so that used an Intel 8008 processor. We were still installing these systems on the GB (England & Wales) electrical grid system until the mid to late 1980’s Repair to component level carried on until around 1994 when the processor boards essentially became obsolete. We had the means to program the 1702AQ using a National Semiconductor development platform (used mainly to design a 6800 based trunked radio system) Significant parts of the SCADA system, mainly the I/O boards, remained in use until about 2000 ish.
@oldblueshirtguy
7 ай бұрын
19:30 Not only does Stan have the only surviving test card G generator, he also seems to have acquired more than one of the wonderful but extremely rare "Club Fruit" biscuits.
@MrJohnBos
6 ай бұрын
I used to work in the TV broadcast studio space back in the late 70's. It is amazing how fast and far the technology has come and how inexpensive things have gotten compared to what they used to cost. Time base correctors, switchers, chroma keyers, text generators, frame stores and special effects generators used to cost hundreds of thousands of dollars, now you can get all in one box for $300. Unreal.
@goggo-bp9oj
7 ай бұрын
A fascinating unit there Matt. I am like you and have a tremendous admiration for Philips test equipment, high quality and beautifully built. I have a high interest in the PM5544 Pattern and have some Rohde & Schwarz SFF and SAF generators which will generate this and can insert the text in top, side and bottom boxes by menu adjustment. these do not have a clock facility unfortunately. you are very lucky to find that facility! I also have an interesting generator by the japanese company, Eiden. Model 3116A. This also has the PM5544 pattern, but no text on pattern facility. There is teletext though. Its also a very accomplished all channel RF modulator to professional world standards including Nicam. Both these models are built to a very high standard. I also have an Eiden 121b RF modulator (well 4 of them) 2 work well but the other 2 have faults. Eiden will not provide any service information at all. These modulators were built to a very high standard and sold early 90s for £20000! I should add that I am a vintage TV enthusiast as well, with the Telefunken sets from the 70s being a particular favourite. After all, Telefunken did invent the PAL system.
@mattstvbarn
7 ай бұрын
What era are the R&S generators from?
@goggo-bp9oj
6 ай бұрын
@@mattstvbarn Hi Matt it’s Difficult to say. No dates on the manuals or units. I would say late 90s to the early 2000s. I will research this.
@theantipope4354
6 ай бұрын
14:09 PAL Horizontal line timing is 15.625KHz (exactly 64us per line), & should be rock stable, so yeah, yours is definitely off, & it explains why your TV is making Bad Noises as the Hor oscillator & EHT generator try to cope with it.
@arrbam02
7 ай бұрын
Great video, enjoyed all 45.52 👍
@jean-michelbocal6766
6 ай бұрын
Radio-Canada Montréal (CBFT) used a PM5544
@Wurlyscope
6 ай бұрын
Thank you the video. I think it took time to settle upon the first turn-on, because of old electrolytic capacitors throughout the circuit boards.
@musiqtee
7 ай бұрын
It’s a meandering thought to be an old’ish engineer having used electronics of this vintage - without realising ‘vintage’ as the obvious future for anything at the time. The ‘industry’ was exactly that - stuff was incredibly expensive, but almost never tied to other financial expectations. You’d be expected to service units within the company, the producers did a lot to educate and document knowledge - without recurring expenditure from lease, IP licensing or forced maintenance outsourcing. I know, is what I say relevant? I think so, because this made workplaces “fuzzy” and by that maybe a little meaningful. Being curious wasn’t a career move, and many side aspects of “work” wasn’t monetised. If one wanted to be silly (a paid nerd), some spent time at work without pay to do just what this video shows now - educating yourself outside of the financial value of gaining experience. Better, worse, silly, wasted time? Yes, all of that. You could still naïvely buy your first apartment from that wasted time, without downpayment. Rhetorically, are we _really_ better off “saving time” today…? 🤓
@echelonrank3927
6 ай бұрын
these days there are service guys who rock up with a laptop which can restore equipment to working order in minutes. all for a "modest" few thousand dollars. but they dont let u keep that laptop !
@Robbie68K
4 ай бұрын
Thanks for sharing. I have one of these myself that was used by Dutch television in Hilversum. It still works, I only had to replace the bulb in the power switch.
@STCTLB-ArchivesAndMore
2 ай бұрын
This test card used to broadcast on the albanian television during communist times until 2012
@pstonard
6 ай бұрын
Excellent video Matt! Great to learn more about my "orphan PM5534" instrument. You have inspired me to move forward with restoring it, it's an NTSC version. Cheers from Portland, Oregon, USA.
@mattstvbarn
6 ай бұрын
Wow. That is cool. Never heard of one surviving! Out of interest which two OQxxxx chips are on your sync generator board?
@pstonard
6 ай бұрын
@@mattstvbarn I’ll know more when I bring it out of storage. I have a path forward on a Sony BVM monitor restoration/upgrade project (also in storage) There’s some construction ahead, starting with building a couple of extender cards for the PM5534.
@mattstvbarn
6 ай бұрын
@@pstonard Extenders were also on my to-do list! Probably best drop me an email to let me know how you get on. It's on the about tab of my channel.
@pstonard
6 ай бұрын
Will do!
@monopalle5768
6 ай бұрын
THIS is what TV was like, EVERY DAY, until like 5pm..... One channel had a BEEEEEP tone playing, the other had RADIO...... And I'm only like 40......
@SuniaKhamya
5 ай бұрын
33:24 You're saying JTV used to use the PM5538 in Jordan _but I figured it out anyway. JTV is Jordan Television (JTV) which was founded in 1968 as the national television station of Jordan and In 1985, Jordan Radio and Jordan Television merged to form. Jordan Radio and Television Corporation (JRTV)_
@joshm7769
6 ай бұрын
That was very interesting, thanks for the video! I had no idea that circle shape was created digitally using an eprom.
@AndreasLindholm
6 ай бұрын
This testpattern was also used by SVT, the swedish equivalent of BBC
@TVArchives-e560
23 күн бұрын
Hi Matt’s, Have you come back to upload clips on KZitem yet? I miss you so much.
@Exciteonium
6 ай бұрын
15.625 Khz Line rate , 4.433 Mhz Chroma Burst
@Indiskret1
6 ай бұрын
Wonderful video! Much obliged. 😊
@jtsiomb
7 ай бұрын
The Greek national TV broadcaster (ERT) also used to have the test pattern with the color bars removed: kzitem.info/news/bejne/x59sqmStcKCrmI4 I thought we always used PAL here, but apparently ERT initially started with SECAM in 1979, and only switched over to PAL in 1992. Our TVs back then were PAL/SECAM compatible, so I never knew the difference.
@michaelbauers8800
5 ай бұрын
This was fascinating, and impressive given the era it came out. How does that B&W pattern board work? Large scale integration digital logic chips? Custom? Or can it do everything with just a bunch of standard gate chips wired a certain way?
@michaelbauers8800
5 ай бұрын
I learned a bit of how circles could be generated with somewhat basic digital logic. Using registers to count some sort of timer, and then looking up the needed data in some ROM. I love this older tech, because it's fascinating how they solved problems in non trivial ways. Once you can write code, and I like to write code ( I get paid) the process is kinda basic to do certain things, like making a circle.
I want to create a replica of the PM5534 pattern generator. Which file should I use?
@FunkOne78
25 күн бұрын
Hi Matt, where are you located, i might have something that would interest you 😊
@mattstvbarn
25 күн бұрын
Berkshire, UK
@PplsChampion
6 ай бұрын
10:36 how did you copy the chips?
@mattstvbarn
6 ай бұрын
48UXP for the PROMs. For the 1702a it is a programmer I designed/built
@BritishBeachcomber
6 ай бұрын
Those were the days. When complicated stuff required complicated electronics. I used to design that stuff. Now it's just a CPU and a few passive components.
@paulstubbs7678
6 ай бұрын
I also had run with an ancient eprom, mine was an MM5204, for which I made an Arduino based box to read them. Luckily I didn't have to write one, not that I'd ever be able to get a blank.
@fredfred2363
6 ай бұрын
Hard to believe that that entire rack mounting box can now be implemented to the same quality in something the size of a small keyring. And cheap too... Interesting vid.
@TVArchives-e560
Ай бұрын
I remember that The PM5544 test card was also used in Serbia in the 80s and 90s. The public broadcaster, RTS (before that RTB) used PM5544 and the top box was the clock while the bottom box was the text which said “JRT BGRD”. I believe it was the text character from the PM5543 teletext generator and it was generated from the PM5544 generator.
@mattstvbarn
Ай бұрын
@@TVArchives-e560 if the clock was in the top box it is unlikely to have been an original Philips generator. By that time many other companies made them for less money.
@TVArchives-e560
Ай бұрын
@@mattstvbarn kzitem.info/news/bejne/q3qZynx_ZoqGfX4si=E6_peoL85_rA3wax This PM5544 used by RTB (later RTS) in Serbia (former Yugoslavia) from late-1970s until 1990s
@TVArchives-e560
Ай бұрын
@@mattstvbarn I haven't seen you upload any clips on KZitem for a long time, and I'd like you to try uploading a clip.
@jj74qformerlyjailbreak3
6 ай бұрын
I would love to find one of these in the wild. Yea they are on eBay everyday, however if I'm real real still and quite one will walk up on me for bagging. 😂 No shots fired.
@kippie80
6 ай бұрын
Could it simply be capacitor reforming that was happening?
@der.Schtefan
7 ай бұрын
Disabling the central pattern is interesting for a TV factory or a repair shop, where the geometry of the whole TV area is checked, e.g. on the factory floor.
@mattstvbarn
7 ай бұрын
But you don't normally need to mortgage your home to do so ;-)
@AndyDoz
7 ай бұрын
Excellent video. Thanks. Needs more camera angles ;)
@mattstvbarn
7 ай бұрын
Let me figure out how to operate just the one camera first :)
@herauthon
6 ай бұрын
Industrieele rails met insteek modules..
@paulstubbs7678
6 ай бұрын
Interesting case, I have a near identical unit, just shallower. My box is a radio isotope metal thickness gauge, definitely not a Philips device. So were Philips into case manufacturing, selling them to anyone, or were they buying in the cases? Oh, and glad you didn't shorten it (or the worse one of lengthening a video with static pics & 'elevator music')
@mattstvbarn
6 ай бұрын
I have seen the case used by other Philips divisions but not other companies yet..
@paulchisholm9392
6 ай бұрын
Thanks for the video. A very expensive piece of equipment back in the day. I bought a brand new Vauxhall Astra for £5000 back in 1984.
@echelonrank3927
6 ай бұрын
there used to be a pattern generator kit in 2005 sold for around $150, that did the same thing this generator does minus the text.
@pstonard
6 ай бұрын
Nice Video, Well done!
@GavinR824
7 ай бұрын
I remember the Ten network in Australia having a square Philips style test pattern when they were setting up the new Perth transmitter in the late 80s. No idea what generated it, but I have seen that style live. kzitem.info/news/bejne/sqB_2XhmcJGidJg
@testcardsandmore1231
7 ай бұрын
That's the Telefunken FuBK test card.
@enginerd80
6 ай бұрын
This is a little offtopic, but for me it was new information that this one pattern was apparently used quite widely around the world. I live in Finland, and when I was a kid in the 80's and 90's I could only see Finnish and some Swedish TV channels (when weather conditions were suitable), and I saw that the Finnish channels had one type of a test pattern (as shown for example on kzitem.info/news/bejne/pWtrn6ZqfGSaaHo ) and the Swedish channels had another type of test pattern (the kind shown on this video). So back then I assumed that in each country or even TV network there would be just their own kind of test pattern. This makes me wonder if the same kind of pattern as in Finland was used elsewhere, and what equipment was used to generate it. In the old days, due to tariffs and currency conversion rates it used to be expensive to import things to Finland from abroad, so there's also some kind of possibility that it was originally some kind of homebrewn system. 🤔 Edit: apparently the video linked in this video's description shows something about what was used in Finland, but that video doesn't end up showing the actual pattern (maybe because the device is broken), so I don't know if that's what I had in my mind...
@mattstvbarn
6 ай бұрын
The guy from Finland does show the output of the PM5570, but it is not as exciting to look at because the output of that generator would never go on air. It is for a different purpose!
@enginerd80
6 ай бұрын
@@mattstvbarn Ah, okay, so it just wasn't for generating the picture I had in my mind. After watching this video I was heading to bed, so I just quickly skimmed the other video through and didn't see the familiar picture. Though, the broadcast test pattern did include a part with similar-looking stripes as in the other video, so perhaps some of the same or similar components were included as part of the broadcast test pattern generator 🤔.
@Richardincancale
7 ай бұрын
Looked like an electrolytic capacitor reforming after having a long holiday. [edit: but the fault seemed to move with the chip - weird!]
@mattstvbarn
7 ай бұрын
It is weird alright. If I hit the chip with freeze spray it fails instantly. The "good" OQ5506 on the other hand doesn't care.
@MatthijsvanDuin
6 ай бұрын
@@mattstvbarn aging or some form of mild electrical damage pushed some of its characteristics just a bit out of spec?
@aspiewithattitude3213
7 ай бұрын
I keep watching your videos and how the PM5544 got it's colours are interesting with the technology that was only available today. It's funny that I managed to crack the codes on the PM5544 test pattern just using Photoshop. How ironic? Through the use of visual arts, not through complex mathematical decoding like how I may see how the PM5544 test card was most likely to be created in 1966.
@aspiewithattitude3213
7 ай бұрын
My father told me when I was young and before he died when I was 30, maths rules over art. I decoded the PM5544 with art instead of maths. I grew fascinated with the test card from the age of 2 in 1982, in my formative years.
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