Re: Extracting the video signal from a 38.9MHz TV IF

On Wed, 5 Aug 2009 11:05:41 +0100, Terry Casey
<k.type@xxxxxxxxxxxxxxx> wrote:

In article <ev5i75ti2ed1015ui8sji5p33qg34ja4ln@xxxxxxx>,
quiettechblue@xxxxxxxxx says...

On Mon, 3 Aug 2009 10:57:03 +0100, Terry Casey
<k.type@xxxxxxxxxxxxxxx> wrote:

In article <0mt9751sd5s1k4u2b2dlmp8qbgjgv05o4t@xxxxxxx>,
quiettechblue@xxxxxxxxx says...

On Fri, 31 Jul 2009 16:31:02 +0100, Terry Casey
<k.type@xxxxxxxxxxxxxxx> wrote:

In article <00b81b96$0$4795$c3e8da3@xxxxxxxxxxxxxxxxx>, usenet09
@philpem.me.uk says...

Hi guys,

Lastly, does anyone know of a reliable reference (or indeed more than
one reference) for this type of technology? As in, TV, video and so
forth (maybe radio as well, though I'm already aware of the existence of
the ARRL Handbook). I've seen "Basic Television and Video Systems" by
Grob which looked like it might be worth a punt (or the £5 Amazon wanted
at least), but some other references would be useful.


None I can recall although I'm sure there are lots (I never read one
because I learn't my TV and electronics stuff the 'drip-feed' way from
the age of about 12 - nearly 20 years before teletext and SAWs
appeared!)


Geez, i may have started both earlier and younger, under ten and about
50 years ago. Damn, half a century in electronics already.

At that age my interests were magnets/solenoids/electromagnets and
motors - electrical, rather than what I would call electronics.

Oh, and that was over 55 years ago ...

Yes. I did say may have.

Oh, and i loved rebuilding clocks and other complex mechanicals at the
time as well. I had a big advantage as my dad was an EE and brought
home such toys as transistors and even early monolithic opamps since
the middle 1950s. Plus we had really good surplus houses in the area
at the time, not to mention Lafayette and Olson's many other
electronics stores within bicycle distance by the time i was 12. I
was buying parts "will call" at Newark by the time turned 16. Heady
days. I claim that i understood color TV before my dad did (though
not the same kind of understanding).

Unfortunately, my circumstances were a bit different to yours as my dad
died when I was 3? and my mum was bringing me and my brother up on a
widowed mother's pension. So, no money and no 'state of the art' goodies
as presents ...

... however, when news of my interests got around, I became the
recipient of a variety of discarded radio receivers of various vintages!

Funny how nobody gave a second thought the safety issues involved when a
youngster took thse things apart and plugged them into the 240V mains
supply ...!

Somebody presented me with a large chassis for some completely anonymous
piece of equipment - no valves or anything obvious to identify it and
partly incomplete but it was obviously (fairly) new and became the donor
of a great many resistors and caps for a multitude of projects. I also
had a couple of useful shops near my secondary school for most of the
bits I couldn't otherwise scavenge ...

... Oh! And like you, I was also interested in clocks and other
mechanical devices ...

About as kindred spirits as timing, location, and circumstances would
allow. I grew up in silicon valley. Currently in California. You?

--
Transmitted with recycled bits.
Damnly my frank, I don't give a dear
----------
.

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