CT-100 color sync issue?

[miniman82]

Did you get the one I sent you?

[Phil Nelson]

Originally Posted by miniman82

Did you get the one I sent you?

I did, thanks. I was able to find a new one after all, so I can return this one to you.

Regards,

Phil

[yagosaga]

Is there a chance to tune or detune the reactance control until the color bars are in sync?

[Phil Nelson]

Originally Posted by yagosaga

Is there a chance to tune or detune the reactance control until the color bars are in sync?

You can access the top of the reactance transformer, 2T124 in the RCA manual ( http://antiqueradio.org/RCACT-100Tel...Service_Manual ). Is this what you're referring to? That adjuster is named A40 in step 37 of the Sams alignment instructions, http://antiqueradio.org/art/temp/RCA...structions.jpg .

Turning that control while watching the screen, I can change the number of bars but not eliminate them.



I wonder if the frequency is too far off to bring into locking range by that means . . . .

Phil

[old_coot88]

Originally Posted by Phil Nelson

You can access the top of the reactance transformer, 2T124.... Is this what you're referring to?

Phil, that adjustment should bring the osc. into sync. See if it will lock in solid, or if it still has 'weak' sync. Bill(oc)

[Phil Nelson]

I'm not entirely sure what you mean by weak sync, but I can get it to lock on a set of horizontal color bands. They don't roll vertically. Moving that adjuster in one direction makes more bands. Moving it in the other direction makes fewer bands. In between the stable points, the bands roll. Continuing in the fewer-bands direction, the adjuster runs out of travel before you reach the Good Place.

Maybe something fishy upstream . . . ?

Phil

[old_coot88]

Phil, what does it do with the original crystal in place?

[miniman82]

Originally Posted by Phil Nelson

I did, thanks. I was able to find a new one after all, so I can return this one to you.

If I needed it, I wouldn't have sent it to you. Go ahead and keep it.