Console TV

[Console User]

Can someone tell me why I recently had to change my Tv from Channel 3 to Channel 4 with the use of my Converter Box to avoid certain commercials and bold black lettering from shaking on the picture? This is a 1986 RCA TV.

I had always used the Channel 3 setting before and had no problem until before Thanksgiving.

Could it be something with the Tuner on Channel 3 or just a glitch with the conversion on the box?

Thanks.