Re: Apple Graphics Tablet

[Michael J. Mahon <mjmahon@aol.com>]

Alex Freed <alex_news@alexfreed.com> wrote:
> On 6/19/2012 4:46 PM, Michael J. Mahon wrote:
>> 
>> The RCA 630TS, the reference design for the first commercial set, used a
>> PLL. Of course, based on pulling a crystal oscillator, as were all color TV
>> sets.
> 
> Looks like the 630TS did not have a color carrier recovery PLL for a
> simple reason that it was a black and white set from 1946 :)
> 
> http://antiqueradio.org/RCA630TSTelevision.htm
> 
> The tube V24 "Horiz. oscillator control" suggests that it probably had a
> PLL for the horizontal stage. So you are right here.

Absolutely right!  Somehow I came up with the reference B&W design instead
of the CT-100 color design. ;-)

I once had a 12" 630TS, so it has a lot of my neurons hooked up to it. ;-).
Having separate audio and video IF strips made it a real chore to align!

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon