DPS 375 Digital Timebase Corrector fails during YouTube Short

[@TTVEaGMXde]

The capacitor must be a ceramic multilayer capacitor based on the shape of the housing (oval). You can also tell by the fact that something like this practically never breaks. The device was built after the 12th week of 1990. The black BNC cable reminds me very much of the cables included with the NV-H75 Video Recorders from Panasonic.

[@ConsumerDV]

I've never worked with Umatic or Dub connectors but I've read about them. My understanding is that it carries pretty much the same signal that is recorded on tape - luminance and chrominance in color-under fashion, and this was exactly the point - to keep it as undisturbed as possible from one VTR to another as Umatic was rather crappy, modified off a home video format. S-Video is different is that chrominance is modulated with either 3.58 MHz (NTSC) or 4.43 MHz (PAL). In both SVideo and Dub luminance - the "Y" part - is compatible, but chrominance is different, hence converters between Dub and SVideo that someone was making and selling fifteen or so years ago in the UK. I've come across schematics how this can be done if one wanted to make it. Anyway, the point is that Dub does carry chrominance part of the signal. If I understand correctly, the indication at 1:56 means Y/C443 is basically PAL S-Video, Y/C685 is low-band Umatic (although quick googling tells me it should be 686 kHz; Betamax is 688 kHz, IDK whether a couple MHz makes difference), Y/C924 is Umatic SP.

[@TTVEaGMXde]

U-matic recorders already have a mixer that converts the signal from the video tape to 4.43 or 3.58 MHz. I would rather try to see if you can use an OPA690 to tap the color signal before the mixer for the CVBS signal. The forwarding to the CVBS mixer must of course be interrupted. Colin probably wants to use the TBC's digital line memory for the DOC (Dropout Compensation). I'm not in a hurry and can wait to see whether AI recognizes dropouts and doesn't repeat the last usable line over and over again. AI can also use the previous and subsequent images. Someone has already demonstrated this manually on YT.

[@BG101UK]

Nice that this "short" isn't also a "narrow" !! 😺 (I despise BlinkerVision™ videos!).

[@video99couk]

I wish KZbin would allow "right way round" videos to be classified as shorts.

[@BG101UK]

@@video99couk I had no idea they didn't. Classic case of pandering to the idiots who don't realize we have horizontal vision, and may not be watching on such an easily-rotatable device anyway.

[@160rpm]

I feel like the missing color signal could be a source of endless headaches if you didn't know that it just needed the composite signal as well

[@video99couk]

It certainly confused me the first time I tried to hook up U-matic with a Dub cable.

[@laustinspeiss]

Read about Genlock

[@CameraTim-DAMMITDOTcom]

That's odd. In all the time I've used dub connections on Umatics and 1/2 inch VCRs *it* was the only video cable needed. There should be Y, C, ground, and some kind of sync, framing, or head switching, pulse going through it. You wouldn't want external composite video, too, because of signal timing differences between dub Y & C and combined 4.43 and luma in the composite video. I'd be a bit suspicious of the TBC having an input switching fault. Another thing that springs to mind is having a common reference between the two TBCs. If there a big timing difference between them that can do odd things, though that's usually a peculiarity of 16 line ones not full frame TBCs.

[@Capturing-Memories]

There is no full chroma signal in the DUB connector, it has the chroma under signal which is useless, You must have a different setup or a custom mod that taps chroma from somewhere else on the board.

[@CameraTim-DAMMITDOTcom]

@@Capturing-Memories for dubbing you don't want the full chroma signal, you want the chroma-under signal. And various TBCs intended for U-matics can directly accept it. It looked like that TBC had the option for it, since it actually has dub inputs AND outputs, and the input mode lists three different freqencies for the Chroma input 4.43 Mhz, 685 kHz and 924 kHz. Or was at least intended to have the options for it (it may depend on how many options are fitted).

[@CameraTim-DAMMITDOTcom]

and since he's using a TBC as a source, it may require configuring to output colour-under chroma at the right frequency, too

[@Knaeckebrotsaege]

Someone here got shadowbanned by YT. It shows "3 replies" before posting this, but there's only one from "Capturing-Memories", so the other 2 comments (or commenters?) got shadowbanned, ie only the poster can see the comment, nobody else, to give the illusion that the comment went through when it actually didn't. easy to verify via incognito mode in the browser

[@Capturing-Memories]

@@Knaeckebrotsaege This is when you have the urge to censor but you don’t want to pay people to do it so you slap in a shitty algorithm to do the human job, to get your post in you have to code it so the machine will not understand it, strange times we’re living in.

[@caius4124]

Hello. I recently acquired this device BetaCam Sony UVW-1400A , it had been idle since 2007. The first time I turned it on, some buttons stayed lit, and the head was spinning even without any tape inside. On the second day I turned it on again, this time I managed to put a tape in, it fitted normally in the mechanism, but I couldn't play it, neither forward nor backward. It was like something was trying to play the tape, but nothing happened. On the third day, after cleaning somes of the mechanisms and checking the bottom, I turned it on again and now the problem from the first day returned, the tape no longer goes in, the buttons turn on without the tape inside and the head spins non-stop, after about 1 minute the device turns off. Any suggestions? Could it still be some dirty sensors inside? Second day testing the device ---> kzbin.infoDqbb3iafdQw

[@snap_oversteer]

I don't think I've ever seen ceramic capacitor blow up like that, did it smell the same as burning tantalum caps?

[@video99couk]

I've never smelled a burning up tant. It was just a burnt up electronic smell.

[@barrieshepherd7694]

In my experience Tants go bang and blast bits of plastic all around - never seen a Tant just burn.

[@retropcs88]

I've seen plenty of ceramic caps go, albeit mostly smd ones. They like to short and then blow up if your power supply is strong enough. Happens in laptops and phones