Re: [ti-99/4a] Modulators (was Even more questions.)
- this is the problem with Composite video (or FBAS) signal, which are pure analog
and modulated. The european R-Y, B-y and Y consoles are more stable, because all
signals are mixed inside the modulator. You may try to trim the oscillator
circuitry inside the main-board, but you need a very good equipment.
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Subject: [ti-99/4a] Modulators (was Even more questions.)
Speaking of modulators - I hooked up an extra console, with cassette, in the
Living Room to play games. I was getting a bad picture with one of my newer
modulators, so I hooked up my original, the one with the red LED, and it was
Then, I tried hooking up my 32kx16 console, and it was horrible!
It just goes to show - some modulators just go bad over the years, and some
TI's video circuitry as well. The right combo will put out a near-perfect
But a direct-connect is better.
> ----------For users/owners of TI-99/4A and compatibles everywhere!
> From: Andy Frueh[SMTP:andyfrueh@...]
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> Subject: RE: [ti-99/4a] Even more questions.
> Assuming the RF modulator is to blame, you might also have some luck using
> TI monitor cable with a VCR, and running the signal through the line-in
> of the VCR.
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>Are you sure that the 32kx16 isn't causing interference? I mean,if it's
>not shealded well enough, it could be causing TV interference, andyou're
>TV would pick that up along with the modulator's signal. I guessyou try
>to test that by running the TI with no video connected, and flip onthe TV
>and see if you see any noise.<snip>
Well, it is shielded by the same shielding used around the CPU. I
suspect the video circuitry needs "fiddling" (a technical term)