|
Television Standards Converters, Modulators etc Standards converters, modulators anything else for providing signals to vintage televisions. |
|
Thread Tools |
13th Dec 2019, 9:59 am | #1 |
Tetrode
Join Date: Nov 2017
Location: Bromsgrove, Worcestershire, UK.
Posts: 63
|
Test cards and what?
Firstly, I feel I must apologise for asking more questions than actually contributing to this board, but I don't have sufficient knowledge or experience of most subjects but I was GPO trained in telecoms and understand most basic principles of electronics and thermionic emission. Having said that, I enjoy this site even if I don't understand a lot of it.
So my question (finally) to the 405/625 TV community is: are you guys able to watch broadcast TV on your old sets via some kind of receiver/converter. I think I've seen reference to playing video so I imagine it's possible to convert Freeview? Please don't be afraid to get technical - I'll cope |
13th Dec 2019, 10:09 am | #2 |
Dekatron
Join Date: May 2003
Location: Edinburgh, UK.
Posts: 3,274
|
Re: Test cards and what?
|
13th Dec 2019, 10:29 am | #3 |
Dekatron
Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 9,433
|
Re: Test cards and what?
If you want to use Freeview, many only have an HDMI output, these converters will convert HDMI to UHF 625.
https://www.radios-tv.co.uk/communit...or/#post-98833 The Aurora and Hedgehog convert 625 to 405 has Peter states, you just need to be sure exactly your requirements.
__________________
Frank |
13th Dec 2019, 11:10 am | #4 |
Dekatron
Join Date: Feb 2005
Location: West Cumbria (CA13), UK
Posts: 6,130
|
Re: Test cards and what?
And before the advent of the Aurora and Hedghog, there were the likes of the Domino, Pineapple and Dinosaur - all now extinct (or at least no longer in production).
In addition to using standards converters for instantaneous conversion from 625-line to 405-line signals, some older VHS recorders were able to record and play back 405-line signals, owing to the fact that they recorded a complete frame of video without any cognisance of the frame's internal structure. Later machines perform processing of the signal, such as substituting "drop-outs" from adjactent lines, which wouldn't work with the different structure of 405-line frames.
__________________
Mending is better than Ending (cf Brave New World by Aldous Huxley) |
13th Dec 2019, 4:07 pm | #5 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,147
|
Re: Test cards and what?
Just to prove the point. This picture was taken a couple of nights ago from a live transmission. The receiver is an unmodified 1953 15" Ekco 405 line receiver model TC196.
The standards converter in this case an AURORA, simply connected to the aerial socket. The Ekco is tuned to channel 1 Band one, the BBC Television Service London station originally at Alexandra Palace [later Crystal Palace] Regards, John. |
13th Dec 2019, 5:04 pm | #6 |
Dekatron
Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 9,433
|
Re: Test cards and what?
Hi John,
How did you feed the signal to the Aurora?
__________________
Frank |
14th Dec 2019, 3:46 pm | #7 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,147
|
Re: Test cards and what?
The AURORA accepts any standard 625 line video input from a Freeview box,
VCR, DVD player, camera etc. It Accepts sound and vision via RCA phono plugs. It also has a 'built in' test card that you can change to your preference. J. |
17th Dec 2019, 11:14 am | #8 |
Heptode
Join Date: May 2009
Location: Birmingham, West Midlands, UK.
Posts: 708
|
Re: Test cards and what?
.....and to enhance your experience with old TVs... how about a nostalgic
(but accurate) screensaver clock for your computer. http://625.uk.com/tv_logos/flash4.htm Just a note these are 'Flash' files as I know some people have an objection/distrust to Flash. |
17th Dec 2019, 3:27 pm | #9 |
Nonode
Join Date: Sep 2017
Location: Stockport, Cheshire, UK.
Posts: 2,004
|
Re: Test cards and what?
I used to look at 625.uk.com quite often but it's hardly been updated in the last few years.
__________________
Hello IT: Have you Tried Turning It Off & On Again? |