5 Jun
2003
5 Jun
'03
1:56 a.m.
Its an RGB
-> NTSC modulator for the Apple IIc. It also came with a
game/TV switch box, but I don't know if that was originally part of the
package, or just a seperate item that was included in the auction.
COOL
I don't know anythng about them, but have been curious for some time.
Please report all you know, post picts, play with it, etc.
OTOH maybe I am thinking about the thing for the IIc+ 
5 Jun
5 Jun
2:09 a.m.
For that matter... why make the modulator at all?!? If
the IIc
has composite video, why bother with an RGB to composite?
Sounds like a build-your-own macTV for people who want to
use their own TV/monitor for the computer. I have one of these
boxes for VGA->NTSC... they're inexpensive now. An RGB to
NTSC converter may more properly be called a "scan converter",
"modulator" is typically the name given to NTSC -> RF over coax.
You can use a scan converter And a modulator together
ComputerRGB -(scan converter)-> NTSC -(modulator)-> TV.
John A.
6:32 a.m.
boxes for VGA->NTSC... they're inexpensive
now. An RGB to
NTSC converter may more properly be called a "scan converter",
"modulator" is typically the name given to NTSC -> RF over coax.
To me, a 'scan converter' has to convert the scanning rates -- say
between European and USA TV, or between VGA video and TV.
A box which converts TV-rate RGB video to an NTSC composite signal is an
'NTSC colour enocder', and I susepct is technically (at least in part) a
modulator [1].
[1] It amplitude- and phase- modulates the 3.58 colour subcarrier for one
thing...
-tony
6:30 a.m.
On Thu, 5 Jun 2003, chris wrote:
Sellam indicated that he thinks the modulator came
with all IIc's, but I
have to question... Why? The IIc already has a composite video out, so
why also ship with the modulator.
To make it easier to hook into a television. Trust me on this one.
I would not be surprised if the Computer/TV slide
switch shipped with
all IIc's, much like they shipped with all Atari 2600's. Just a cheap
item to toss in so people can connect it to their TV set. But including
an apparently redundant function modulator, that just seems silly.
Don't make me pull out an original Apple //c Packing List ;)
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
* Old computing resources for business and academia at www.VintageTech.com *
6:32 a.m.
Sellam indicated that he thinks the modulator came
with all IIc's, but I
have to question... Why? The IIc already has a composite video out, so
why also ship with the modulator.
I am confused. Composite video is 'baseband' video, right? You either
connect that to the composite video input on a TV/monitor, or feed it
into a modulator to turn it into a modulated RF carrier you can connect
to the aerial (antenna) connection of a TV set.
A modulator doesn't seem to be redundant if you have composite video and
a live-chassis TV with no video input socket.
-tony
7:33 a.m.
chris wrote:
<Snip>
Most televisions in the late 70's - early 80's came with RF in only. If
you wanted comp in, you had to buy a "monitor".
Back then, VCRs weighed 50 lbs and cost around $500.
Jim Davis.
I am thinking
about the thing for the IIc+
Sellam indicated that he thinks the modulator came with all IIc's, but I
have to question... Why? The IIc already has a composite video out, so
why also ship with the modulator.
For that matter... why make the modulator at all?!? If the IIc has
composite video, why bother with an RGB to composite? Does the IIc+ not
have the composite?
I would not be surprised if the Computer/TV slide switch shipped with all
IIc's, much like they shipped with all Atari 2600's. Just a cheap item to
toss in so people can connect it to their TV set. But including an
apparently redundant function modulator, that just seems silly.
-chris
<http://www.mythtech.net>
8:58 a.m.
Most televisions in the late 70's - early 80's
came with RF in only. If
And many of them had a live ('hot') chassis so it was non-trivial to add
a composite video input...
you wanted comp in, you had to buy a
"monitor".
Back then, VCRs weighed 50 lbs and cost around $500.
On the other hand, they still work 20 years later, unlike the modern
plastic crap I see for sale.
-tony
11:47 a.m.
Tony Duell wrote:
No kidding, I must have six cheap VCRs in various states of disrepair.
OT: I still have a 2X sony
clamshell scsi CD rom drive from the early 80's, Still works. Paid
$300. I have dozens of broken, cheap
CDROM drives, some less than a year old. Too bad warranty shipping cost
more then replacement cost.
Jim.
Most
televisions in the late 70's - early 80's came with RF in only. If
And many of them had a live ('hot') chassis so it was non-trivial to add
a composite video input...
you wanted comp in, you had to buy a
"monitor".
Back then, VCRs weighed 50 lbs and cost around $500.
On the other hand, they still work 20 years later, unlike the modern
plastic crap I see for sale.
-tony
1:27 p.m.
----- Original Message -----
From: "Tony Duell" <ard(a)p850ug1.demon.co.uk>
To: <cctalk(a)classiccmp.org>
Sent: Friday, June 06, 2003 6:17 AM
Subject: Re: Cool little modulator
Quite.
Most
televisions in the late 70's - early 80's came with RF in only. If
And many of them had a live ('hot') chassis so it was non-trivial to add
a composite video input... > you wanted comp in, you had to buy a
"monitor".
> Back then, VCRs weighed 50 lbs and cost around $500.
Or more.
On the other hand, they still work 20 years later,
unlike the modern
plastic crap I see for sale.
I still have a circa 1980 Sony Beta that's 8" high 14" deep and about
18" long
and it weighs a *lot*, however, it still works. (I saved it from a scrapyard and
replaced
the only faulty component - a fuse - some 10 years back.)
Geoff in Oz
6 Jun
6 Jun
10:13 a.m.
I still have a circa 1980 Sony Beta that's 8"
high 14" deep and about 18" long
and it weighs a *lot*, however, it still works. (I saved it from a scrapyard and
replaced
Betamax is _modern_ :-)... I have a pair of 1972-vintage Philips N1500s
still in working condition (and still, AFAIK, with the original heads --
the only things I've had to replace are the belts and one transistor). I
have some even older Sony reel-to-reel VTRs, but those have had head
replacements (done the hard way, using betamax head tips on the original
beam...)
I really must sort out my Philips V2000 machines. It is said they give a
very good picture, and I must also admit that some of the features, like
'dynamic track following' with the heads mounted on peizo-actuators,
appear to the hacker in me :-)
Of course I have the service manuals for all of the above, but then I
would, right :-)
-tony
11:26 p.m.
>>I am thinking about the thing for the IIc+
Most televisions in the late 70's - early 80's
came with RF in only. If
you wanted comp in, you had to buy a "monitor".
Back then, VCRs weighed 50 lbs and cost around $500.
Jim Davis.
I still have my RCA XL100 19" color monitor from that era, and have avoided
rf connections ever since (though less now).
What I am thinking of is rgb for the IIc+, thats a bit more rare.
7869
days inactive
7871
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10 comments
7 participants
participants (7)
-
allain＠panix.com -
ard＠p850ug1.demon.co.uk -
cb＠mythtech.net -
geoffrob＠stmarks.pp.catholic.edu.au -
jpdavis＠gorge.net -
mikeford＠socal.rr.com -
vcf＠siconic.com