In article .com,
parahumanoid wrote:
DID search the web for this, but I only found some schematic
drawings on RF modulators, but the input on those is COLOR, LUM, AUDIO
rather than the expected AUDIO LEFT, AUDIO RIGHT, VIDEO. So I guess
they aren't what I need.
Please don't suggest buying one in RadioShack - I don't have
RadioSchack in my country (at least I am not aware of its presence on
our market).

Might then help if you stated your country.

Or reading 300 books after which I will be able to think
up a schematic of my own. I need a practical fix to a practical
problem. It's a small town with no such devices on the shelves (I
tried to do special order, but to no avail). We do have the radio
parts market here, though, so with proper schematics I want to try to
produce the modulator on my own.

In case it matters, both the signal source device (DVD deck) and the
TV set are PAL.

You'd need to say which type of PAL as there are several which would
effect the design of the modulator. Also you appear to want stereo. In the
UK 'PAL' stereo involves NICAM which is a digital signal on a sub carrier.
Other countries do have multiplex stereo, though.

To design and build a modulator from scratch is no mean task - and
*really* not worth the effort, given the cost of them to buy. If you
ignore stereo that broadens your choice of ready made ones - they are used
for games consols and security cameras as well as normal AV purposes.

Surely you must have somewhere that does mail order even although you
don't have an RS store? Or the DIY stores sell modulators for use with
security cameras. Check that it does have sound too, though.

If you live in the UK, Maplin is a rough equivalent to RadioShack.

--
*Why is the word abbreviation so long? *

Dave Plowman London SW
To e-mail, change noise into sound.