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Television Standards Converters, Modulators etc Standards converters, modulators anything else for providing signals to vintage televisions. |
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3rd Aug 2004, 7:00 pm | #21 |
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Re: Specs and Feedback needed for converter
I've looked to update my very old standards converter for some time. Mine does a very good job, but it dates back a few years and is very bulky with a separate modulator on Channel 1 only. What I would ideally like to replace it with is a smaller standards converter with a modulator which could be switched between Channels 1&4 and even perhaps any of the channels 1-5. I have considered ordering a Domino standards converter for a long time but I have waited until either a Channel 4 modulator was offered individually or else a model was launched that could switch between channels 1 and 4 or any channel from 1-5. Having a modulator which would cover a number of channels would, for me, be something which would make me seriously consider updating my current standards converter and modulator.
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3rd Aug 2004, 8:05 pm | #22 |
Rest in Peace
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Location: Newcastle, Tyne and Wear, UK.
Posts: 188
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Re: Specs and Feedback needed for converter
Hi all, a switchable modulator would indeed be useful because as the collection inevitably grows the early sets are not tuneable which means either another modulator or re-tuning the existing one In my case i have a Pineapple 2 fed from a Thompson digi-box with internal home brew modulator which works well and integrates into the domestic scene fairly well being all contained in a slim vcr sized case The digi-box is used normally and the Pineapple switched in when a nostalgia trip is required . A switchable modulator would add much more versatility to any system, i look forward with anticipation . Another thought ! as we are all going digital shortly we are receiving,tuning and processing these signals digitally is it not possible to use these signals to directly drive a standards converter? i must point out at this point that i know very little about digital electronics . My own set-up is Digital-Analogue-Digital-Analogue : in fact i have christened it DADA.....seems a shame to convert and re-convert any ideas? Mikeymushradio
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3rd Aug 2004, 9:23 pm | #23 |
Hexode
Join Date: Jul 2004
Location: Michigan USA
Posts: 325
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Re: Specs and Feedback needed for converter
Hi Mikey,
It is inevitable that we will need to make an HD digital standards converter in the not to distant future. Once NTSC and PAL end for good, we'll have to down convert HD signals to our old sets. DVI and 1394 seem to be the digital interfaces of choice right now for HD TV. Although these interfaces can be more expensive than an A/D interface currently is, it would eliminate the digital to analog to digital to analog conversion. Although this seems to be a cumbersome chain, we're really not losing that much since we start with a higher resolution standard and then down convert, usually go through a modulator anyway. Darryl
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Aurora video standards converters: http://www.tech-retro.com/Aurora_Design/Video_Home.html |
3rd Aug 2004, 10:39 pm | #24 | |
Tetrode
Join Date: Aug 2003
Location: Cambridge, Cambridgeshire, UK.
Posts: 91
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Re: Specs and Feedback needed for converter
Quote:
I have the opposite problem to you, in that I don't have a standards converter - YET! Last edited by Paul Stenning; 29th Dec 2004 at 1:48 pm. |
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4th Aug 2004, 7:31 am | #25 |
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Location: Solingen, Germany
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Modulators *[was Specs/Feedback for converter]
Hi all
I want to run a few TV's at the same time . If you have a Birmingham set and a London set you can not do this with a switchable thing . At 625 I have a switchable modulator (with dip switches for every standard and frequency). But I added some fixt to run different TV's without switching . I think with one modulator which makes Birningham and London you can run all 405 equipment at the same time without switching . A lot of stages in a modulator can be used for both modulators so it is not as much comlicated as building two modulators . Question to the people who want to build a finished thing: How much would you spend for such a modulator? Kind regards Darius (I think we should move this discussion to the modulator thread... ) Best I can do is modify the title TTFN, Jon, your friendly neighbourhood moderator Last edited by Station X; 30th Dec 2004 at 5:10 pm. Reason: Import |
4th Aug 2004, 2:46 pm | #26 |
Hexode
Join Date: Jul 2004
Location: Michigan USA
Posts: 325
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Re: Specs and Feedback needed for converter
Interesting point Darius. I also like to run a few sets at a time once in a while, so having multiple outputs would be nice, although it does raise the complexity. Would there be any issues with cross talk between the two circuits?
Darryl
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Aurora video standards converters: http://www.tech-retro.com/Aurora_Design/Video_Home.html |
4th Aug 2004, 3:51 pm | #27 |
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Re: Specs and Feedback needed for converter
Being able to have Channels 1 & 4 on individually or together would certainly be VERY useful, that way you could have as many sets on at once as you wanted.
Currently I feed VHF and UHF signals all around the house along the same co-axial system, this includes Channel 1, standard over-the-air BBC & ITV, Sky, Freeview and 2 VCR's using standard aerial distribution amplifiers. The signal at each set is very good on VHF and all UHF channels, so I don't see any problem with sending a Channel 4 signal aongside a Channel 1 signal. Ideally it would be best if a modulator were available where you could switch on Channel 1, Channel 4 or both together. Over to the technical guys......... |
4th Aug 2004, 4:09 pm | #28 |
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Location: Solingen, Germany
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Re: Specs and Feedback needed for converter
Gidday all,
Yes, you are right Darryl you have to use a filter at each modulator output like I did. I am able to build and agly the filters. Cheers, Darius |
4th Aug 2004, 7:57 pm | #29 |
Rest in Peace
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Location: Newcastle, Tyne and Wear, UK.
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Re: Specs and Feedback needed for converter
Hi Darius
i]How much would you spend for such a modulator?i] Any idea how much such a modulator would cost to design and build? i am sure several people would buy a good quality 2 channel unit . I know i would be interested. Mikeymushradio |
5th Aug 2004, 7:32 am | #30 |
Retired Dormant Member
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Location: Solingen, Germany
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Re: Specs and Feedback needed for converter
Good morning,
design costs nothing. Material ca. 50 Euro if you don't use XTAL's. It is the work cutting the metal soildering the components make and agly the coils with the analyzer etc. I am sure it will take two days or so to build one. I'll start building a London/Birmingham modulator next time and pose the development here... Kind regards Darius I started a new thrad for the London/Birmingham modulator... |
6th Aug 2004, 8:43 pm | #31 |
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Re: Specs and Feedback needed for converter
You can count me in for ordering if one becomes available.
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