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Television Standards Converters, Modulators etc Standards converters, modulators anything else for providing signals to vintage televisions. |
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12th Feb 2006, 10:18 am | #21 | |
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Re: Watching TV on vintage sets...
Quote:
You should place an emitter follower at it's output. Kind regards Darius |
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12th Feb 2006, 10:51 am | #22 |
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Re: Watching TV on vintage sets...
Hi, I made a little drawing attached how an emitter follower looks like.
The LM1881 has a lot of usefull outputs: Pin 1 negative going composite sync output Pin 3 negative going vertical sync output Pin 5 Burst/ Back Porch output Pin 7 odd/even frame detect output At the 74121 you have a vertical blanking output, positive going at pin 6 and negative going a pin1. If you don't need the colour trap L1 C16/17 Q12 can operate as an open collector inverter, input at JP7. Kind regards Darius |
12th Feb 2006, 12:11 pm | #23 | |
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Re: Watching TV on vintage sets...
Quote:
To ppppenguin: only the line output unit used valves. All other units are transistorised. But there is no IC. On some capacitors I read the time stamp of 2/69. A switch for external or internal sync is not identified. Unusual are -18 volts at the grid of the crt. I would expect 60 - 80 volts positive here, and the brightness control has no effect. I will check the path of the brightness control current. Kind regards Eckhard |
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22nd Feb 2006, 10:24 am | #24 |
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Re: Watching TV on vintage sets...
Good morning,
for removing Macrovision in the vertical flyback, please don't load D3. Kind regards Darius |
22nd Feb 2006, 3:04 pm | #25 | |
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Re: Watching TV on vintage sets...
Quote:
did you already test it with a Macrovision DVD? Kind regards, Eckhard |
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22nd Feb 2006, 3:55 pm | #26 | |
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Re: Watching TV on vintage sets...
Quote:
Darius |
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2nd Mar 2006, 12:34 pm | #27 |
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Re: Watching TV on vintage sets...
http://bs.cyty.com/menschen/e-etzold.../uvb/uvb_e.htm
The UVB has a website now. Kind regards Darius |
31st Jul 2006, 8:17 am | #28 | |
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Re: Watching TV on vintage sets...
Quote:
Some words about Macrovision and the UVB. Removing Macrovision is illegal. The UVB does not remove Macrovision. It limits the bright parts during the V- blanking periode to ensure that the vertical flyback is not visible on vintage TV sets. Macrovision is still present after the UVB and will be detected form DVD recorders etc. Kind regards Darius |
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31st Jul 2006, 6:50 pm | #29 | |
Tetrode
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Re: Watching TV on vintage sets...
Quote:
Darius is this kit sill available? It'll be nice to be able to watch TV with out all the junk in the flyback Richard |
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1st Aug 2006, 7:13 am | #30 | |
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Re: Watching TV on vintage sets...
Quote:
Darius |
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1st Aug 2006, 4:52 pm | #31 | |
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Re: Watching TV on vintage sets...
Quote:
There are add-on boxes that do just that. I have one of them. Enables me to make videotape copies of DVDs or other macrovision encoded videotapes if I were so inclined. However its primary purpose is to stabilize the video enough so I can feed it through an RF modulator and then tune in on my television through VHF channel 3. |
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3rd Aug 2006, 9:12 am | #32 |
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Re: Watching TV on vintage sets...
What a brilliant design, do yuo plan to make these available at all?
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3rd Aug 2006, 6:32 pm | #33 | |
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Re: Watching TV on vintage sets...
Quote:
Kind regards, Darius |
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4th Aug 2006, 9:11 am | #34 |
Rest in Peace
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Re: Watching TV on vintage sets...
Well either really, it would just be so useful. How do any of us place an order with you?
Peter. |
4th Aug 2006, 6:37 pm | #35 | |
Tetrode
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Re: Watching TV on vintage sets...
Quote:
PM Darius I've ordered mine Richard |
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5th Aug 2006, 9:27 am | #36 |
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Re: Watching TV on vintage sets...
Good morning,
the UVB makes only sense with NTSC or PAL vision signals. And it is able to add the (V-) sync pedestals that were common in USA 525 and german 625. In 405 you don't have to remove teletext or colour. This should be done by your standard converter. If you want to build a modulator it makes sense for every standard. It is able to make the biasing for an NPN or PNP "transconductance modulator". In 405 a V-sync pedestal reduces vertical flyback lines too. Kind regards Darius |